WO2005118754A2 - 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof - Google Patents
1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof Download PDFInfo
- Publication number
- WO2005118754A2 WO2005118754A2 PCT/US2005/018881 US2005018881W WO2005118754A2 WO 2005118754 A2 WO2005118754 A2 WO 2005118754A2 US 2005018881 W US2005018881 W US 2005018881W WO 2005118754 A2 WO2005118754 A2 WO 2005118754A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- trifluoromethyl
- pentanone
- nonafluoro
- weight percent
- composition
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 134
- RMLFHPWPTXWZNJ-UHFFFAOYSA-N novec 1230 Chemical compound FC(F)(F)C(F)(F)C(=O)C(F)(C(F)(F)F)C(F)(F)F RMLFHPWPTXWZNJ-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000003507 refrigerant Substances 0.000 title claims description 73
- 238000005057 refrigeration Methods 0.000 claims abstract description 55
- 238000004378 air conditioning Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 35
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 150000002576 ketones Chemical class 0.000 claims abstract description 17
- 150000002148 esters Chemical class 0.000 claims abstract description 14
- PULPCFLUVFWKAF-UHFFFAOYSA-N 1,1-difluoro-n,n-dimethylmethanamine Chemical compound CN(C)C(F)F PULPCFLUVFWKAF-UHFFFAOYSA-N 0.000 claims abstract description 13
- AEVFFOPMCQULHD-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-(1,1,2,2,2-pentafluoroethylsulfanyl)ethane Chemical compound FC(F)(F)C(F)(F)SC(F)(F)C(F)(F)F AEVFFOPMCQULHD-UHFFFAOYSA-N 0.000 claims abstract description 11
- -1 phenanthracenes Chemical class 0.000 claims description 106
- 239000002904 solvent Substances 0.000 claims description 58
- 125000004432 carbon atom Chemical group C* 0.000 claims description 43
- 229930195733 hydrocarbon Natural products 0.000 claims description 43
- 239000004215 Carbon black (E152) Substances 0.000 claims description 39
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 33
- SPEUIVXLLWOEMJ-UHFFFAOYSA-N 1,1-dimethoxyethane Chemical compound COC(C)OC SPEUIVXLLWOEMJ-UHFFFAOYSA-N 0.000 claims description 22
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 22
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 22
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 22
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 claims description 22
- 125000001931 aliphatic group Chemical group 0.000 claims description 21
- 239000007850 fluorescent dye Substances 0.000 claims description 20
- 239000000975 dye Substances 0.000 claims description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims description 17
- 239000001257 hydrogen Substances 0.000 claims description 16
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 16
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 15
- 150000002596 lactones Chemical class 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 12
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 claims description 11
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 11
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 claims description 11
- 238000001704 evaporation Methods 0.000 claims description 11
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 claims description 11
- 239000013529 heat transfer fluid Substances 0.000 claims description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 11
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 10
- 150000001408 amides Chemical class 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- 150000002825 nitriles Chemical class 0.000 claims description 10
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 229920001774 Perfluoroether Polymers 0.000 claims description 8
- 150000008378 aryl ethers Chemical class 0.000 claims description 8
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims description 8
- KFUSEUYYWQURPO-OWOJBTEDSA-N trans-1,2-dichloroethene Chemical group Cl\C=C\Cl KFUSEUYYWQURPO-OWOJBTEDSA-N 0.000 claims description 8
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical group FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000000460 chlorine Chemical group 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 7
- QUPDWYMUPZLYJZ-UHFFFAOYSA-N ethyl Chemical compound C[CH2] QUPDWYMUPZLYJZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000011737 fluorine Chemical group 0.000 claims description 7
- 229910052731 fluorine Chemical group 0.000 claims description 7
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 6
- 125000002723 alicyclic group Chemical group 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002516 radical scavenger Substances 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 230000000873 masking effect Effects 0.000 claims description 5
- 229920005862 polyol Polymers 0.000 claims description 5
- 150000003077 polyols Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 4
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 4
- VWCLQNINSPFHFV-UHFFFAOYSA-N 10-oxapentacyclo[12.8.0.02,11.04,9.015,20]docosa-1(14),2(11),4,6,8,12,15,17,19,21-decaene Chemical class C1=CC=C2C3=CC=C4OC5=CC=CC=C5CC4=C3C=CC2=C1 VWCLQNINSPFHFV-UHFFFAOYSA-N 0.000 claims description 3
- OALHHIHQOFIMEF-UHFFFAOYSA-N 3',6'-dihydroxy-2',4',5',7'-tetraiodo-3h-spiro[2-benzofuran-1,9'-xanthene]-3-one Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 OALHHIHQOFIMEF-UHFFFAOYSA-N 0.000 claims description 3
- 150000001454 anthracenes Chemical class 0.000 claims description 3
- 150000005840 aryl radicals Chemical class 0.000 claims description 3
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N benzo-alpha-pyrone Natural products C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 claims description 3
- XJHABGPPCLHLLV-UHFFFAOYSA-N benzo[de]isoquinoline-1,3-dione Chemical class C1=CC(C(=O)NC2=O)=C3C2=CC=CC3=C1 XJHABGPPCLHLLV-UHFFFAOYSA-N 0.000 claims description 3
- 125000002619 bicyclic group Chemical group 0.000 claims description 3
- 235000001671 coumarin Nutrition 0.000 claims description 3
- 125000000332 coumarinyl group Chemical class O1C(=O)C(=CC2=CC=CC=C12)* 0.000 claims description 3
- 150000002979 perylenes Chemical class 0.000 claims description 3
- 150000005075 thioxanthenes Chemical class 0.000 claims description 3
- 150000003732 xanthenes Chemical class 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 2
- 150000002443 hydroxylamines Chemical class 0.000 claims description 2
- CBOIHMRHGLHBPB-UHFFFAOYSA-N hydroxymethyl Chemical compound O[CH2] CBOIHMRHGLHBPB-UHFFFAOYSA-N 0.000 claims description 2
- 150000002905 orthoesters Chemical group 0.000 claims description 2
- 150000002989 phenols Chemical class 0.000 claims description 2
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims description 2
- 150000003573 thiols Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- LYGJENNIWJXYER-BJUDXGSMSA-N nitromethane Chemical group [11CH3][N+]([O-])=O LYGJENNIWJXYER-BJUDXGSMSA-N 0.000 claims 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract description 38
- 239000012530 fluid Substances 0.000 abstract description 10
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 abstract description 7
- 150000003254 radicals Chemical class 0.000 description 13
- AJDIZQLSFPQPEY-UHFFFAOYSA-N 1,1,2-Trichlorotrifluoroethane Chemical compound FC(F)(Cl)C(F)(Cl)Cl AJDIZQLSFPQPEY-UHFFFAOYSA-N 0.000 description 10
- 239000000654 additive Substances 0.000 description 10
- 125000001183 hydrocarbyl group Chemical group 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 8
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 125000005842 heteroatom Chemical group 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 5
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 5
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 5
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 5
- 238000010792 warming Methods 0.000 description 5
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 150000002170 ethers Chemical class 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 229930195734 saturated hydrocarbon Natural products 0.000 description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 4
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- UQRONKZLYKUEMO-UHFFFAOYSA-N 4-methyl-1-(2,4,6-trimethylphenyl)pent-4-en-2-one Chemical group CC(=C)CC(=O)Cc1c(C)cc(C)cc1C UQRONKZLYKUEMO-UHFFFAOYSA-N 0.000 description 3
- JNCMHMUGTWEVOZ-UHFFFAOYSA-N F[CH]F Chemical compound F[CH]F JNCMHMUGTWEVOZ-UHFFFAOYSA-N 0.000 description 3
- 229940123457 Free radical scavenger Drugs 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 150000004703 alkoxides Chemical class 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 125000002592 cumenyl group Chemical group C1(=C(C=CC=C1)*)C(C)C 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 125000003944 tolyl group Chemical group 0.000 description 3
- 125000005023 xylyl group Chemical group 0.000 description 3
- XMGQYMWWDOXHJM-JTQLQIEISA-N (+)-α-limonene Chemical compound CC(=C)[C@@H]1CCC(C)=CC1 XMGQYMWWDOXHJM-JTQLQIEISA-N 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- ZPVFWPFBNIEHGJ-UHFFFAOYSA-N 2-octanone Chemical compound CCCCCCC(C)=O ZPVFWPFBNIEHGJ-UHFFFAOYSA-N 0.000 description 2
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 2
- RHLVCLIPMVJYKS-UHFFFAOYSA-N 3-octanone Chemical compound CCCCCC(=O)CC RHLVCLIPMVJYKS-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- NMSQHDLIUSFSPZ-UHFFFAOYSA-N 5-methyl-1-pentylpiperidin-2-one Chemical compound CCCCCN1CC(C)CCC1=O NMSQHDLIUSFSPZ-UHFFFAOYSA-N 0.000 description 2
- FFWSICBKRCICMR-UHFFFAOYSA-N 5-methyl-2-hexanone Chemical compound CC(C)CCC(C)=O FFWSICBKRCICMR-UHFFFAOYSA-N 0.000 description 2
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000004322 Butylated hydroxytoluene Substances 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 2
- 229940095259 butylated hydroxytoluene Drugs 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- CGZZMOTZOONQIA-UHFFFAOYSA-N cycloheptanone Chemical compound O=C1CCCCCC1 CGZZMOTZOONQIA-UHFFFAOYSA-N 0.000 description 2
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 2
- ZAJNGDIORYACQU-UHFFFAOYSA-N decan-2-one Chemical compound CCCCCCCCC(C)=O ZAJNGDIORYACQU-UHFFFAOYSA-N 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- MQHNKCZKNAJROC-UHFFFAOYSA-N dipropyl phthalate Chemical compound CCCOC(=O)C1=CC=CC=C1C(=O)OCCC MQHNKCZKNAJROC-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 2
- TVQGDYNRXLTQAP-UHFFFAOYSA-N ethyl heptanoate Chemical compound CCCCCCC(=O)OCC TVQGDYNRXLTQAP-UHFFFAOYSA-N 0.000 description 2
- SHZIWNPUGXLXDT-UHFFFAOYSA-N ethyl hexanoate Chemical compound CCCCCC(=O)OCC SHZIWNPUGXLXDT-UHFFFAOYSA-N 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/04—Saturated compounds containing keto groups bound to acyclic carbon atoms
- C07C49/16—Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen
- C07C49/167—Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen containing only fluorine as halogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
- C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/102—Alcohols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/104—Carboxylic acid esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/108—Aldehydes or ketones
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/11—Ethers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
- C09K2205/122—Halogenated hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/132—Components containing nitrogen
Definitions
- the present invention relates to compositions for use in refrigeration and air conditioning systems comprising 1,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone (PEIK) and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N- dimethylamine, 1 ,1,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or mixtures thereof.
- PEIK nonafluoro-4-(trifluoromethyl)-3-pentanone
- the present invention relates to compositions for use in refrigeration and air-conditioning systems employing a centrifugal compressor comprising 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3- pentanone (PEIK) and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, perfluoro-N- methylmorpholine, 1,1,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or combinations thereof.
- the compositions of the present invention may be azeotropic or near azeotropic and are useful in processes for producing refrigeration or heat or as heat transfer fluids.
- the object of the present invention is to provide novel refrigerant compositions and heat transfer fluids that provide unique characteristics to meet the demands of low or zero ozone depletion potential and lower global warming potential as compared to current refrigerants.
- compositions selected from the group consisting of: 1 ,1 ,1 ,2,2,4,5, 5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dichloroethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,2-dichloroethylene; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thi
- the present invention further relates to the above listed compositions specifically for use in refrigeration or air conditioning systems including employing a centrifugal compressor.
- the present invention further relates to the above listed compositions specifically for use in refrigeration or air conditioning systems employing a multistage or 2-stage centrifugal compressor.
- the present invention further relates to the above listed compositions specifically for use in refrigeration or air conditioning systems employing a single pass/single slab heat exchanger.
- the present invention further relates to azeotropic or near azeotropic refrigerant compositions. These compositions are useful in refrigeration or air conditioning systems.
- the compositions are also useful in refrigeration or air conditioning systems employing a centrifugal compressor.
- the present invention further relates to processes for producing refrigeration, heat, and transfer of heat from a heat source to a heat sink using the present inventive compositions.
- DETAILED DESCRIPTION OF THE INVENTION Applicants specifically incorporate the entire contents of all cited references in this disclosure. Further, when an amount, concentration, or other value or parameter is given as either a range, preferred range, or a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. Where a range of numerical values is recited herein, unless otherwise stated, the range is intended to include the endpoints thereof, and all integers and fractions within the range.
- compositions of the present invention comprising 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (PEIK) and at least one chlorocarbon, alcohol, ketone, ether, ester, N- (difluoromethyl)-N,N-dimethylamine, 1 ,1 ,1 ,2,2-pentafluoro-2-
- the refrigerant compositions of the present invention may comprise a mixture of PEIK with combinations of any of the listed components.
- the refrigerant compositions of the present invention comprise compounds selected from chlorocarbons, alcohols, ethers, ketones, esters, N-(difluoromethyl)-N,N-dimethylamine, or 1 ,1 ,1 ,2,2-pentafluoro-2- [(pentafluoroethyl)thio]ethane.
- Representative chlorocarbons, alcohols, ethers, ketones, and esters are listed in Table 1.
- Representative compounds that may be components of the compositions of the present invention are listed in Table 1. TABLE 1
- compositions of the present invention have low or zero ozone depletion potential and low global warming potential .
- PEIK and the other compounds of the present invention alone or in mixtures will have global warming potentials lower than many HFC refrigerants currently in use.
- the compositions of the present invention that are mixtures may be prepared by any convenient method to combine the desired amounts of the individual components.
- the refrigerant or heat transfer compositions of the present invention include: 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N-(difluoromethyl)-N,N-dimethylamine; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1,1- dichloroethane; 1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1,1- dichloroethane; 1 ,1 ,1 ,2,2,
- the refrigerant or heat transfer compositions of the present invention may be azeotropic or near azeotropic compositions.
- An azeotropic composition is a liquid admixture of two or more substances that has a constant boiling point that may be above or below the boiling points of the individual components. As such an azeotropic composition will not fractionate within the refrigeration or air conditioning system during operation, which may reduce efficiency of the system. Additionally, an azeotropic composition will not fractionate upon leakage from the refrigeration or air conditioning system. In the situation where one component of a mixture is flammable, fractionation during leakage could lead to a flammable composition either within the system or outside of the system.
- a near azeotropic composition is a substantially constant boiling, liquid admixture of two or more substances that behaves essentially as a single substance.
- One way to characterize a near azeotropic composition is that the vapor produced by partial evaporation or distillation of the liquid has substantially the same composition as the liquid from which it was evaporated or distilled, that is, the admixture distills/refluxes without substantial composition change.
- Another way to characterize a near azeotropic composition is that the bubble point vapor pressure and the dew point vapor pressure of the composition at a particular temperature are substantially the same.
- a composition is near azeotropic if, after 50 weight percent of the composition is removed, such as by evaporation or boiling off, the difference in vapor pressure between the original composition and the composition remaining after 50 weight percent of the original composition has been removed is less than about 10 percent.
- the azeotropic refrigerant compositions of the present invention are listed in Table 2. TABLE 2
- compositions of the present invention may further comprise about 0.01 weight percent to about 5 weight percent of a stabilizer, free radical scavenger or antioxidant.
- a stabilizer free radical scavenger or antioxidant.
- additives include but are not limited to, nitromethane, hindered phenols, hydroxylamines, thiols, phosphites, or lactones. Single additives or combinations may be used.
- the compositions of the present invention may further comprise about 0.01 weight percent to about 5 weight percent of a water scavenger (drying compound).
- water scavengers may comprise ortho esters such as trimethyl-, triethyl-, or tripropylortho formate.
- the compositions of the present invention may further comprise an ultra-violet (UV) dye and optionally a solubilizing agent.
- UV ultra-violet
- the UV dye is a useful component for detecting leaks of the refrigerant composition by permitting one to observe the fluorescence of the dye in the refrigerant or heat transfer fluid composition at a leak point in or the vicinity of refrigeration or air-conditioning apparatus.
- One may observe the fluorosence of the dye under an ultra-violet light.
- Solubilizing agents may be needed due to poor solubility of such UV dyes in some refrigerants.
- ultra-violet is meant a UV fluorescent composition that absorbs light in the ultra-violet or "near" ultra-violet region of the electromagnetic spectrum.
- the fluorescence produced by the UV fluorescent dye under illumination by a UV light that emits radiation with wavelength anywhere from 10 nanometer to 750 nanometer may be detected.
- UV fluorescent dyes include but are not limited to naphthalimides, perylenes, coumarins, anthracenes, phenanthracenes, xanthenes, thioxanthenes, naphthoxanthenes, fluoresceins, and derivatives or combinations thereof.
- Solubilizing agents of the present invention comprise at least one compound selected from the group consisting of hydrocarbons, hydrocarbon ethers, polyoxyalkylene glycol ethers, amides, nitriles, ketones, chlorocarbons, esters, lactones, aryl ethers, fluoroethers and 1 ,1 ,1-trifluoroalkanes.
- Hydrocarbon solubilizing agents of the present invention comprise hydrocarbons including straight chained, branched chain or cyclic alkanes or alkenes containing 5 or fewer carbon atoms and only hydrogen with no other functional groups.
- hydrocarbon solubilizing agents comprise propane, propylene, cyclopropane, n-butane, isobutane, and n-pentane. It should be noted that if the refrigerant is a hydrocarbon, then the solubilizing agent may not be the same hydrocarbon.
- Hydrocarbon ether solubilizing agents of the present invention comprise ethers containing only carbon, hydrogen and oxygen, such as dimethyl ether (DME).
- Polyoxyalkylene glycol ether solubilizing agents of the present invention are represented by the formula R 1 [(OR 2 ) x OR 3 ] y , wherein: x is an integer from 1-3; y is an integer from 1-4; R 1 is selected from hydrogen and aliphatic hydrocarbon radicals having 1 to 6 carbon atoms and y bonding sites; R 2 is selected from aliphatic hydrocarbylene radicals having from 2 to 4 carbon atoms; R 3 is selected from hydrogen and aliphatic and alicyclic hydrocarbon radicals having from 1 to 6 carbon atoms; at least one of R 1 and R 3 is said hydrocarbon radical; and wherein said polyoxyalkylene glycol ethers have a molecular weight of from about 100 to about 300 atomic mass units.
- x is preferably 1- 2; y is preferably 1 ; R 1 and R 3 are preferably independently selected from hydrogen and aliphatic hydrocarbon radicals having 1 to 4 carbon atoms; R 2 is preferably selected from aliphatic hydrocarbylene radicals having from 2 or 3 carbon atoms, most preferably 3 carbon atoms; the polyoxyalkylene glycol ether molecular weight is preferably from about 100 to about 250 atomic mass units, most preferably from about 125 to about 250 atomic mass units.
- the R 1 and R 3 hydrocarbon radicals having 1 to 6 carbon atoms may be linear, branched or cyclic.
- R 1 and R 3 hydrocarbon radicals include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, terf-butyl, pentyl, isopentyl, neopentyl, fe/f-pentyl, cyclopentyl, and cyclohexyl.
- R 1 and R 3 are preferably aliphatic hydrocarbon radicals having 1 to 4 carbon atoms, most preferably 1 carbon atom.
- the R 2 aliphatic hydrocarbylene radicals having from 2 to 4 carbon atoms form repeating oxyalkylene radicals - (OR 2 ) x - that include oxyethylene radicals, oxypropylene radicals, and oxybutylene radicals.
- the oxyalkylene radical comprising R 2 in one polyoxyalkylene glycol ether solubilizing agent molecule may be the same, or one molecule may contain different R 2 oxyalkylene groups.
- the present polyoxyalkylene glycol ether solubilizing agents preferably comprise at least one oxypropylene radical.
- R 1 is an aliphatic or alicyclic hydrocarbon radical having 1 to 6 carbon atoms and y bonding sites
- the radical may be linear, branched or cyclic.
- Representative R 1 aliphatic hydrocarbon radicals having two bonding sites include, for example, an ethylene radical, a propylene radical, a butylene radical, a pentylene radical, a hexylene radical, a cyclopentylene radical and a cyclohexylene radical.
- R 1 aliphatic hydrocarbon radicals having three or four bonding sites include residues derived from polyalcohols, such as trimethylolpropane, glycerin, pentaerythritol, 1 ,2,3- trihydroxycyclohexane and 1 ,3,5-trihydroxycyclohexane, by removing their hydroxyl radicals.
- Representative polyoxyalkylene glycol ether solubilizing agents include but are not limited to: CH 3 OCH 2 CH(CH 3 )0(H or CH 3 ) (propylene glycol methyl (or dimethyl) ether), CH 3 ⁇ [CH 2 CH(CH 3 )0] 2 (H or CH 3 ) (dipropylene glycol methyl (or dimethyl) ether), CH 3 0[CH 2 CH(CH 3 )0] 3 (H or CH 3 ) (tripropylene glycol methyl (or dimethyl) ether),
- Amide solubilizing agents of the present invention comprise those represented by the formulae R 1 CONR 2 R 3 and cyclo-[R 4 CON(R 5 )-], wherein R 1 , R 2 , R 3 and R 5 are independently selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms; R 4 is selected from aliphatic hydrocarbylene radicals having from 3 to 12 carbon atoms; and wherein said amides have a molecular weight of from about 100 to about 300 atomic mass units. The molecular weight of said amides is preferably from about 160 to about 250 atomic mass units.
- R 1 , R 2 , R 3 and R 5 may optionally include substituted hydrocarbon radicals, that is, radicals containing non-hydrocarbon substituents selected from halogens (e.g., fluorine, chlorine) and alkoxides (e.g. methoxy).
- R 1 , R 2 , R 3 and R 5 may optionally include heteroatom-substituted hydrocarbon radicals, that is, radicals, which contain the atoms nitrogen (aza-), oxygen (oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms.
- amide solubilizing agents consist of carbon, hydrogen, nitrogen and oxygen.
- R 1 , R 2 , R 3 and R 5 aliphatic and alicyclic hydrocarbon radicals include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, ferf-butyl, pentyl, isopentyl, neopentyl, terf-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers.
- a preferred embodiment of amide solubilizing agents are those wherein R 4 in the aforementioned formula cyclo-[R 4 CON(R 5 )-] may be represented by the hydrocarbylene radical (CR 6 R 7 ) n , in other words, the formula: cyclo- [(CR 6 R 7 ) n CON(R 5 )-] wherein: the previously-stated values for molecular weight apply; n is an integer from 3 to 5; R 5 is a saturated hydrocarbon radical containing 1 to 12 carbon atoms; R 6 and R 7 are independently selected (for each n) by the rules previously offered defining R 1"3 .
- R 6 and R 7 are preferably hydrogen, or contain a single saturated hydrocarbon radical among the n methylene units, and R 5 is a saturated hydrocarbon radical containing 3 to 12 carbon atoms.
- R 5 is a saturated hydrocarbon radical containing 3 to 12 carbon atoms.
- amide solubilizing agents include but are not limited to: 1-octylpyrrolidin-2-one, 1-decylpyrrolidin-2-one, 1-octyl-5- methylpyrrolidin-2-one, 1-butylcaprolactam, 1-cyclohexylpyrrolidin-2-one, 1 -butyl-5-methylpiperid-2-one, 1 -pentyl-5-methylpiperid-2-one, 1 - hexylcaprolactam, 1-hexyl-5-methylpyrrolidin-2-one, 5-methyl-1- pentylpiperid-2-one, 1 ,3-dimethylpiperid-2-one, 1-methylcaprolactam, 1- butyl-pyrrolidin-2-one, 1 ,5-dimethylpiperid-2-one, 1-decyl-5- methylpyrrolidin-2-one, 1-dodecylpyrrolid-2-one, N,N-dibutylformamide and N,N-d
- Ketone solubilizing agents of the present invention comprise ketones represented by the formula R 1 COR 2 , wherein R 1 and R 2 are independently selected from aliphatic, alicyclic and aryl hydrocarbon radicals having from 1 to 12 carbon atoms, and wherein said ketones have a molecular weight of from about 70 to about 300 atomic mass units.
- R 1 and R 2 in said ketones are preferably independently selected from aliphatic and alicyclic hydrocarbon radicals having 1 to 9 carbon atoms.
- the molecular weight of said ketones is preferably from about 100 to 200 atomic mass units.
- R 1 and R 2 may together form a hydrocarbylene radical connected and forming a five, six, or seven-membered ring cyclic ketone, for example, cyclopentanone, cyclohexanone, and cycloheptanone.
- R 1 and R 2 may optionally include substituted hydrocarbon radicals, that is, radicals containing non-hydrocarbon substituents selected from halogens (e.g., fluorine, chlorine) and alkoxides (e.g. methoxy).
- R and R 2 may optionally include heteroatom-substituted hydrocarbon radicals, that is, radicals, which contain the atoms nitrogen (aza-), oxygen (keto-, oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms.
- heteroatom-substituted hydrocarbon radicals that is, radicals, which contain the atoms nitrogen (aza-), oxygen (keto-, oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms.
- no more than three non-hydrocarbon substituents and heteroatoms, and preferably no more than one, will be present for each 10 carbon atoms in R 1 and R 2 , and the presence of any such non- hydrocarbon substituents and heteroatoms must be considered in applying the aforementioned molecular weight limitations.
- R 1 and R 2 aliphatic, alicyclic and aryl hydrocarbon radicals in the general formula R 1 COR 2 include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, fetf-butyl, pentyl, isopentyl, neopentyl, fe/f-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers, as well as phenyl, benzyl, cumenyl, mesityl, tolyl, xylyl and phenethyl.
- ketone solubilizing agents include but are not limited to: 2-butanone, 2-pentanone, acetophenone, butyrophenone, hexanophenone, cyclohexanone, cycloheptanone, 2-heptanone, 3- heptanone, 5-methyl-2-hexanone, 2-octanone, 3-octanone, diisobutyl ketone, 4-ethylcyclohexanone, 2-nonanone, 5-nonanone, 2-decanone, 4- decanone, 2-decalone, 2-tridecanone, dihexyl ketone and dicyclohexyl ketone.
- Nitrile solubilizing agents of the present invention comprise nitriles represented by the formula R 1 CN, wherein R 1 is selected from aliphatic, alicyclic or aryl hydrocarbon radicals having from 5 to 12 carbon atoms, and wherein said nitriles have a molecular weight of from about 90 to about 200 atomic mass units.
- R 1 in said nitrile solubilizing agents is preferably selected from aliphatic and alicyclic hydrocarbon radicals having 8 to 10 carbon atoms.
- the molecular weight of said nitrile solubilizing agents is preferably from about 120 to about 140 atomic mass units.
- R 1 may optionally include substituted hydrocarbon radicals, that is, radicals containing non-hydrocarbon substituents selected from halogens (e.g., fluorine, chlorine) and alkoxides (e.g. methoxy).
- R 1 may optionally include heteroatom-substituted hydrocarbon radicals, that is, radicals, which contain the atoms nitrogen (aza-), oxygen (keto-, oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms.
- R 1 aliphatic, alicyclic and aryl hydrocarbon radicals in the general formula R 1 CN include pentyl, isopentyl, neopentyl, ferf-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers, as well as phenyl, benzyl, cumenyl, mesityl, tolyl, xylyl and phenethyl.
- nitrile solubilizing agents include but are not limited to: 1- cyanopentane, 2,2-dimethyl-4-cyanopentane, 1 -cyanohexane, 1- cyanoheptane, 1-cyanooctane, 2-cyanooctane, 1-cyanononane, 1- cyanodecane, 2-cyanodecane, 1-cyanoundecane and 1-cyanododecane.
- Chlorocarbon solubilizing agents of the present invention comprise chlorocarbons represented by the formula RCI X , wherein; x is selected from the integers 1 or 2; R is selected from aliphatic and alicyclic hydrocarbon radicals having 1 to 12 carbon atoms; and wherein said chlorocarbons have a molecular weight of from about 100 to about 200 atomic mass units.
- the molecular weight of said chlorocarbon solubilizing agents is preferably from about 120 to 150 atomic mass units.
- R aliphatic and alicyclic hydrocarbon radicals in the general formula RCI X include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, terf-butyl, pentyl, isopentyl, neopentyl, terf-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers.
- chlorocarbon solubilizing agents include but are not limited to: 3-(chloromethyl)pentane, 3-chloro-3-methylpentane, 1- chlorohexane, 1,6-dichlorohexane, 1-chloroheptane, 1-chlorooctane, 1- chlorononane, 1 -chlorodecane, and 1 , 1 , 1 -trichlorodecane.
- Ester solubilizing agents of the present invention comprise esters represented by the general formula R 1 C0 2 R 2 , wherein R 1 and R 2 are independently selected from linear and cyclic, saturated and unsaturated, alkyl and aryl radicals.
- esters consist essentially of the elements C, H and O, have a molecular weight of from about 80 to about 550 atomic mass units.
- Representative esters include but are not limited to: (CH 3 )2CHCH 2 OOC(CH 2 ) 2-4 OCOCH 2 CH(CH 3 )2 (diisobutyl dibasic ester), ethyl hexanoate, ethyl heptanoate, n-butyl propionate, n-propyl propionate, ethyl benzoate, di-n-propyl phthalate, benzoic acid ethoxyethyl ester, dipropyl carbonate, "Exxate 700" (a commercial C 7 alkyl acetate), "Exxate 800" (a commercial C 8 alkyl acetate), dibutyl phthalate, and tert-butyl acetate.
- Lactone solubilizing agents of the present invention comprise lactones represented by structures [A],
- lactones contain the functional group -C0 2 - in a ring of six (A), or preferably five atoms (B), wherein for structures [A] and [B], Ri through Rs are independently selected from hydrogen or linear, branched, cyclic, bicyclic, saturated and unsaturated hydrocarbyl radicals. Each Ri though R 8 may be connected forming a ring with another R-i through R 8 .
- the lactone may have an exocyclic alkylidene group as in structure [C], wherein Ri through Re are independently selected from hydrogen or linear, branched, cyclic, bicyclic, saturated and unsaturated hydrocarbyl radicals. Each Ri though R 6 may be connected forming a ring with another Ri through R 6 .
- the lactone solubilizing agents have a molecular weight range of from about 80 to about 300 atomic mass units, preferred from about 80 to about 200 atomic mass units.
- lactone solubilizing agents include but are not limited to the compounds listed in Table 4. TABLE 4
- Lactone solubilizing agents generally have a kinematic viscosity of less than about 7 centistokes at 40°C.
- gamma- undecalactone has kinematic viscosity of 5.4 centistokes and cis-(3-hexyl- 5-methyl)dihydrofuran-2-one has viscosity of 4.5 centistokes both at 40°C.
- Lactone solubilizing agents may be available commercially or prepared by methods as described in U. S. provisional patent application 10/910,495 (inventors being P. J. Fagan and C. J. Brandenburg), filed August 3, 2004, incorporated herein by reference.
- Aryl ether solubilizing agents of the present invention further comprise aryl ethers represented by the formula R 1 OR 2 , wherein: R 1 is selected from aryl hydrocarbon radicals having from 6 to 12 carbon atoms; R 2 is selected from aliphatic hydrocarbon radicals having from 1 to 4 carbon atoms; and wherein said aryl ethers have a molecular weight of from about 100 to about 150 atomic mass units.
- R 1 aryl radicals in the general formula R 1 OR 2 include phenyl, biphenyl, cumenyl, mesityl, tolyl, xylyl, naphthyl and pyridyl.
- R 2 aliphatic hydrocarbon radicals in the general formula R 1 OR 2 include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and terf-butyl.
- Representative aromatic ether solubilizing agents include but are not limited to: methyl phenyl ether (anisole), 1 ,3-dimethyoxybenzene, ethyl phenyl ether and butyl phenyl ether.
- Fluoroether solubilizing agents of the present invention comprise those represented by the general formula R 1 OCF 2 CF 2 H, wherein R is selected from aliphatic and alicyclic hydrocarbon radicals having from about 5 to about 15 carbon atoms, preferably primary, linear, saturated, alkyl radicals.
- Representative fluoroether solubilizing agents include but are not limited to: C 8 H 17 OCF 2 CF 2 H and C 6 H 13 OCF 2 CF 2 H. It should be noted that if the refrigerant is a fluoroether, then the solubilizing agent may not be the same fluoroether.
- Fluoroether solubilizing agents may further comprise ethers derived from fluoro-olefins and polyols.
- Representative fluoro-olefins are tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, and perfluoromethylvinyl ether.
- the polyols may be of the type HOCH 2 CRR'(C H 2 )z(CHOH) x CH 2 (CH 2 OH)y, wherein R and R' are hydrogen or CH 3 or C 2 H 5 and wherein x is an integer from 0-4, y is an integer from 0-3 and z is either zero or 1.
- Representative polyols are trimethylol propane, pentaerythritol, butane diol, and ethylene glycol.
- 1 ,1 ,1-Trifluoroalkane solubilizing agents of the present invention comprise 1 ,1 ,1 -trif luoroalkanes represented by the general formula CF 3 R 1 , wherein R 1 is selected from aliphatic and alicyclic hydrocarbon radicals having from about 5 to about 15 carbon atoms, preferably primary, linear, saturated, alkyl radicals.
- Representative 1 ,1 ,1- trifluoroalkane solubilizing agents include but are not limited to: 1 ,1 ,1- trif luorohexane and 1 ,1 ,1 -trif luorododecane.
- Solubilizing agents of the present invention may be present as a single compound, or may be present as a mixture of more than one solubilizing agent. Mixtures of solubilizing agents may contain two solubilizing agents from the same class of compounds, say two lactones, or two solubilizing agents from two different classes, such as a lactone and a polyoxyalkylene glycol ether.
- the present compositions comprising refrigerant and UV fluorescent dye, from about 0.001 weight percent to about 1.0 weight percent of the composition is UV dye, preferably from about 0.005 weight percent to about 0.5 weight percent, and most preferably from 0.01 weight percent to about 0.25 weight percent. Solubility of these UV fluorescent dyes in refrigerants may be poor.
- US patent no. RE 36,951 describes a method, which utilizes a dye powder, solid pellet or slurry of dye that may be inserted into a component of the refrigeration or air conditioning apparatus. As refrigerant and lubricant are circulated through the apparatus, the dye is dissolved or dispersed and carried throughout the apparatus. Numerous other methods for introducing dye into a refrigeration or air conditioning apparatus are described in the literature. Ideally, the UV fluorescent dye could be dissolved in the refrigerant itself thereby not requiring any specialized method for introduction to the refrigeration or air conditioning apparatus.
- the present invention relates to compositions including UV fluorescent dye, which may be introduced into the system in the refrigerant.
- compositions comprising refrigerant, UV fluorescent dye and solubilizing agent, from about 1 to about 50 weight percent, preferably from about 2 to about 25 weight percent, and most preferably from about 5 to about 15 weight percent of the combined composition is solubilizing agent in the refrigerant.
- the UV fluorescent dye is present in a concentration from about 0.001 weight percent to about 1.0 weight percent in the refrigerant, preferably from 0.005 weight percent to about 0.5 weight percent, and most preferably from 0.01 weight percent to about 0.25 weight percent.
- commonly used refrigeration system additives may be added, as desired, to compositions of the present invention in order to enhance performance and system stability.
- These additives are known within the field of refrigeration, and include, but are not limited to, anti wear agents, extreme pressure lubricants, corrosion and oxidation inhibitors, metal surface deactivators, free radical scavengers, and foam control agents,.
- these additives are present in the inventive compositions in small amounts relative to the overall composition.
- concentrations of from less than about 0.1 weight percent to as much as about 3 weight percent of each additive are used.
- additives are selected on the basis of the individual system requirements.
- These additives include members of the triaryl phosphate family of EP (extreme pressure) lubricity additives, such as butylated triphenyl phosphates (BTPP), or other alkylated triaryl phosphate esters, e.g. Syn- 0-Ad 8478 from Akzo Chemicals, tricresyl phosphates and related compounds.
- BTPP butylated triphenyl phosphates
- alkylated triaryl phosphate esters e.g. Syn- 0-Ad 8478 from Akzo Chemicals, tricresyl phosphates and related compounds.
- the metal dialkyl dithiophosphat.es e.g.
- zinc dialkyl dithiophosphate or ZDDP
- Lubrizol 1375 and other members of this family of chemicals may be used in compositions of the present invention.
- Other antiwear additives include natural product oils and asymmetrical polyhydroxyl lubrication additives, such as Synergol TMS (International Lubricants).
- stabilizers such as anti oxidants, free radical scavengers, and water scavengers may be employed.
- Compounds in this category can include, but are not limited to, butylated hydroxy toluene (BHT) and epoxides. Solubilizing agents such as ketones may have an objectionable odor, which can be masked by addition of an odor masking agent or fragrance.
- BHT butylated hydroxy toluene
- Solubilizing agents such as ketones may have an objectionable odor, which can be masked by addition of an odor masking agent or fragrance.
- odor masking agents or fragrances may include Evergreen, Fresh Lemon, Cherry, Cinnamon, Peppermint, Floral or Orange Peel, all available commercially, as well as d-limonene and pinene.
- Such odor masking agents may be used at concentrations of from about 0.001 % to as much as about 15% by weight based on the combined weight of odor masking agent and solubilizing agent.
- the present invention further relates to a method of using the refrigerant or heat transfer fluid compositions further comprising ultraviolet fluorescent dye, and optionally, solubilizing agent, in refrigeration or air conditioning apparatus. The method comprises introducing the refrigerant or heat transfer fluid composition into the refrigeration or air conditioning apparatus.
- the present invention further relates to a method of using the refrigerant or heat transfer fluid compositions comprising ultraviolet fluorescent dye to detect leaks.
- the presence of the dye in the compositions allows for detection of leaking refrigerant in the refrigeration or air conditioning apparatus. Leak detection helps to address, resolve or prevent inefficient operation of the apparatus or system or equipment failure.
- Leak detection also helps one contain chemicals used in the operation of the apparatus.
- the method comprises providing the composition comprising refrigerant, ultra-violet fluorescent dye as described herein, and optionally, a solubilizing agent as described herein, to refrigeration and air conditioning apparatus and employing a sutiable means for detecting the UV fluorescent dye-containing refrigerant.
- Suitable means for detecting the dye include, but are not limited to, ultra-violet lamp, often referred to as a "black light” or "blue light”. Such ultra-violet lamps are commercially available from numerous sources specifically designed for this purpose.
- the present invention further relates to a method of using the compositions of the present invention for producing refrigeration or heat, wherein the method comprises producing refrigeration by evaporating said composition in the vicinity of a body to be cooled and thereafter condensing said composition; or producing heat by condensing said composition in the vicinity of the body to be heated and thereafter evaporating said composition.
- Vapor-compression refrigeration systems include an evaporator, a compressor, a condenser, and an expansion device.
- a vapor-compression cycle re-uses refrigerant in multiple steps producing a cooling effect in one step and a heating effect in a different step. The cycle can be described simply as follows.
- Liquid refrigerant enters an evaporator through an expansion device, and the liquid refrigerant boils in the evaporator at a low temperature to form a gas and produce cooling.
- the low-pressure gas enters a compressor where the gas is compressed to raise its pressure and temperature.
- the higher-pressure (compressed) gaseous refrigerant then enters the condenser in which the refrigerant condenses and discharges its heat to the environment.
- the refrigerant returns to the expansion device through which the liquid expands from the higher-pressure level in the condenser to the low-pressure level in the evaporator, thus repeating the cycle.
- compressors There are various types of compressors that may be used in refrigeration applications.
- Compressors can be generally classified as reciprocating, rotary, jet, centrifugal, scroll, screw or axial-flow, depending on the mechanical means to compress the fluid, or as positive- displacement (e.g., reciprocating, scroll or screw) or dynamic (e.g., centrifugal or jet), depending on how the mechanical elements act on the fluid to be compressed. Either positive displacement or dynamic compressors may be used in the present inventive process.
- a centrifugal type compressor is the preferred equipment for the present refrigerant compositions.
- a centrifugal compressor uses rotating elements to accelerate the refrigerant radially, and typically includes an impeller and diffuser housed in a casing.
- Centrifugal compressors usually take fluid in at an impeller eye, or central inlet of a circulating impeller, and accelerate it radially outward. Some static pressure rise occurs in the impeller, but most of the pressure rise occurs in the diffuser section of the casing, where velocity is converted to static pressure.
- Each impeller-diffuser set is a stage of the compressor.
- Centrifugal compressors are built with from 1 to 12 or more stages, depending on the final pressure desired and the volume of refrigerant to be handled.
- the pressure ratio, or compression ratio, of a compressor is the ratio of absolute discharge pressure to the absolute inlet pressure.
- Pressure delivered by a centrifugal compressor is practically constant over a relatively wide range of capacities.
- Positive displacement compressors draw vapor into a chamber, and the chamber decreases in volume to compress the vapor. After being compressed, the vapor is forced from the chamber by further decreasing the volume of the chamber to zero or nearly zero.
- a positive displacement compressor can build up a pressure, which is limited only by the volumetric efficiency and the strength of the parts to withstand the pressure.
- a centrifugal compressor depends entirely on the centrifugal force of the high-speed impeller to compress the vapor passing through the impeller. There is no positive displacement, but rather what is called dynamic-compression. The pressure a centrifugal compressor can develop depends on the tip speed of the impeller.
- Tip speed is the speed of the impeller measured at its tip and is related to the diameter of the impeller and its revolutions per minute.
- the capacity of the centrifugal compressor is determined by the size of the passages through the impeller. This makes the size of the compressor more dependent on the pressure required than the capacity. Because of its high-speed operation, a centrifugal compressor is fundamentally a high volume, low-pressure machine.
- a centrifugal compressor works best with a low-pressure refrigerant, such as trichlorofluoromethane (CFC-11) or 1 ,2,2-trichlorotrifluoroethane (CFC- 113). Large centrifugal compressors typically operate at 3000 to 7000 revolutions per minute (rpm).
- Small turbine centrifugal compressors are designed for high speeds, from about 40,000 to about 70,000 (rpm), and have small impeller sizes, typically less than 0.15 meters.
- a multi-stage impeller may be used in a centrifugal compressor to improve compressor efficiency thus requiring less power in use.
- the discharge of the first stage impeller goes to the suction intake of a second impeller.
- Both impellers may operate by use of a single shaft (or axle).
- Each stage can build up a compression ratio of about 4 to 1; that is, the absolute discharge pressure can be four times the absolute suction pressure.
- An example of a two- stage centrifugal compressor system, in this case for automotive applications, is described in US 5,065,990, incorporated herein by reference.
- compositions of the present invention suitable for use in a refrigeration or air conditioning systems employing a centrifugal compressor comprise at least one of: 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dichloroethane; 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,
- compositions of the present invention are also suitable for use in a multi-stage centrifugal compressor, preferably a two-stage centrifugal compressor apparatus.
- the compositions of the present invention may be used in stationary air-conditioning, heat pumps or mobile air-conditioning and refrigeration systems.
- Stationary air conditioning and heat pump applications include window, ductless, ducted, packaged terminal, chillers and commercial, including packaged rooftop.
- Refrigeration applications include domestic or home refrigerators and freezers, ice machines, self- contained coolers and freezers, walk-in coolers and freezers and transport refrigeration systems.
- the compositions of the present invention may additionally be used in air-conditioning, heating and refrigeration systems that employ fin and tube heat exchangers, microchannel heat exchangers and vertical or horizontal single pass tube or plate type heat exchangers.
- microchannel heat exchangers may not be ideal for the low pressure refrigerant compositions of the present invention.
- the low operating pressure and density result in high flow velocities and high frictional losses in all components.
- the evaporator design may be modified.
- a single slab/single pass heat exchanger arrangement may be used. Therefore, a preferred heat exchanger for the low pressure refrigerants of the present invention is a single slab/single pass heat exchanger.
- compositions of the present invention are suitable for use in refrigeration or air conditioning systems employing a single slab/single pass heat exchanger: 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1,1,1 ,2,2,4,5,5,5-nonafIuoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1,1-dichloroethane; 1 ,1,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and
- compositions of the present invention are particularly useful in small turbine centrifugal compressors, which can be used in auto and window air conditioning or heat pumps as well as other applications.
- These high efficiency miniature centrifugal compressors may be driven by an electric motor and can therefore be operated independently of the engine speed.
- a constant compressor speed allows the system to provide a relatively constant cooling capacity at all engine speeds. This provides an opportunity for efficiency improvements especially at higher engine speeds as compared to a conventional R-134a automobile air-conditioning system.
- the advantage of these low pressure systems becomes even greater.
- Some of the low pressure refrigerant fluids of the present invention may be suitable as drop-in replacements for CFC-113 in existing centrifugal equipment.
- the present invention relates to a process for producing refrigeration comprising evaporating the compositions of the present invention in the vicinity of a body to be cooled, and thereafter condensing said compositions.
- the present invention further relates to a process for producing heat comprising condensing the compositions of the present invention in the vicinity of a body to be heated, and thereafter evaporating said compositions.
- the present invention further relates to a process for transfer of heat from a heat source to a heat sink wherein the compositions of the present invention serve as heat transfer fluids. Said process for heat transfer comprises transferring the compositions of the present invention from a heat source to a heat sink.
- Heat transfer fluids are utilized to transfer, move or remove heat from one space, location, object or body to a different space, location, object or body by radiation, conduction, or convection.
- a heat transfer fluid may function as a secondary coolant by providing means of transfer for cooling (or heating) from a remote refrigeration (or heating) system.
- the heat transfer fluid may remain in a constant state throughout the transfer process (i.e., not evaporate or condense).
- evaporative cooling processes may utilize heat transfer fluids as well.
- a heat source may be defined as any space, location, object or body from which it is desirable to transfer, move or remove heat.
- heat sources may be spaces (open or enclosed) requiring refrigeration or cooling, such as refrigerator or freezer cases in a supermarket, building spaces requiring air conditioning, or the passenger compartment of an automobile requiring air conditioning.
- a heat sink may be defined as any space, location, object or body capable of absorbing heat.
- a vapor compression refrigeration system is one example of such a heat sink.
- a vessel is charged with an initial composition at a specified temperature, and the initial vapor pressure of the composition is measured.
- the composition is allowed to leak from the vessel, while the temperature is held constant, until 50 weight percent of the initial composition is removed, at which time the vapor pressure of the composition remaining in the vessel is measured.
- Table 5 The results are summarized in Table 5 below.
- PEIK/t-DCE (31 .8 °C) 72.0/28.0 14.72 101.49 14.72 101.49 0.0% 85/15 14.62 100.80 14.03 96.73 4.0% 87/13 14.56 100.39 13.36 92.11 8.2% 88/12 14.52 100.11 12.82 88.39 11.7% 100/0 7.79 53.71 7.79 53.71 0.0% 60/40 14.70 101.35 14.67 101.15 0.2% 50/50 14.68 101.22 14.61 100.73 0.5% 48/52 14.68 101.22 14.28 98.46 2.7% 0/100 8.34 57.50 8.34 57.50 0.0%
- compositions of the present invention are azeotropic or azeotrope-like. Where an azeotrope is present, the data show compositions of the present invention have an initial vapor pressure higher than the vapor pressure of either pure component.
- Tip Speed to Develop Pressure can be estimated by making some fundamental relationships for refrigeration equipment that use centrifugal compressors.
- Equation 8 is based on some fundamental assumptions, it provides a good estimate of the tip speed of the impeller and provides an important way to compare tip speeds of refrigerants.
- Table 6 shows theoretical tip speeds that are calculated for 1 ,2,2-trichlorotrifluoroethane (CFC-113) and compositions of the present invention. The conditions assumed for this comparison are:
- EXAMPLE 3 Performance Data Table 7 shows the performance of various refrigerants compared to CFC-113. The data are based on the following conditions. Evaporator temperature 40.0°F (4.4°C) Condenser temperature 110.0°F (43.3°C) Subcool temperature 10.0°F (5.5°C) Return gas temperature 75.0°F (23.8°C) Compressor efficiency is 70%
- compositions of the present invention have evaporator and condenser pressures similar to CFC-113. Some compositions also have higher capacity and/or energy efficiency (COP) than CFC-113.
- COP energy efficiency
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Abstract
The present invention relates to compositions for use in refrigeration and air conditioning systems comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, 1,1,1,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or mixtures thereof, and which are also useful in systems employing a centrifugal compressor. The compositions of the present invention may be azeotropic or near azeotropic and are useful in processes for producing refrigeration or heat or as heat transfer fluids.
Description
TITLE OF INVENTION 1 ,1 ,1 ,2,2,4,5,5,5-NONAFLUORO-4-(TRIFLUOROMETHYL)-3- PENTANONE REFRIGERANT COMPOSITIONS AND USES THEREOF CROSS REFERENCED TO RELATED APPLICATION(S) This application claims the priority benefit of U.S. Provisional Application 60/575,037, fiied May 26, 2004, and U.S. Provisional Application 60/584,785, filed June 29, 2004. BACKGROUND OF THE INVENTION
1. Field of the Invention. The present invention relates to compositions for use in refrigeration and air conditioning systems comprising 1,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone (PEIK) and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N- dimethylamine, 1 ,1,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or mixtures thereof. Further, the present invention relates to compositions for use in refrigeration and air-conditioning systems employing a centrifugal compressor comprising 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3- pentanone (PEIK) and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, perfluoro-N- methylmorpholine, 1,1,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or combinations thereof. The compositions of the present invention may be azeotropic or near azeotropic and are useful in processes for producing refrigeration or heat or as heat transfer fluids.
2. Description of Related Art. The refrigeration industry has been working for the past few decades to find replacement refrigerants for the ozone depleting chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) being phased out as a result of the Montreal Protocol. The solution for most refrigerant producers has been the commercialization of hydrofluorocarbon (HFC) refrigerants. The new HFC refrigerants, HFC- 134a being the most widely used at this time, have zero ozone depletion potential and thus are not affected by the current regulatory phase out as a result of the Montreal Protocol.
Further environmental regulations may ultimately cause global phase out of certain HFC refrigerants as well. Currently, the automobile industry is facing regulations relating to global warming potential for refrigerants used in mobile air-conditioning. Therefore, there is a great current need to identify new refrigerants with reduced global warming potential for the automobile air-conditioning market. Should the regulations be more broadly applied in the future, an even greater need will be felt for refrigerants that can be used in all areas of the refrigeration and air-conditioning industry. Currently proposed replacement refrigerants for HFC-134a include HFC-152a, pure hydrocarbons such as butane or propane, or "natural" refrigerants such as C02 or ammonia. Many of these suggested replacements are toxic, flammable, and/or have low energy efficiency. Therefore, new alternatives are constantly being sought. The object of the present invention is to provide novel refrigerant compositions and heat transfer fluids that provide unique characteristics to meet the demands of low or zero ozone depletion potential and lower global warming potential as compared to current refrigerants.
BRIEF SUMMARY OF THE INVENTION The present invention relates to compositions selected from the group consisting of: 1 ,1 ,1 ,2,2,4,5, 5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dichloroethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,2-dichloroethylene; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and acetone; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and diisopropyl ether; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,2-dimethoxyethane;
1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and dimethoxymethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dimethoxyethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and tert-butyl methyl ether; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and isopropanol; 1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and n- propanol; 1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethyl formate; 1 ,11 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl acetate; and 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl formate. The present invention further relates to the above listed compositions specifically for use in refrigeration or air conditioning systems including employing a centrifugal compressor. The present invention further relates to the above listed compositions specifically for use in refrigeration or air conditioning systems employing a multistage or 2-stage centrifugal compressor. The present invention further relates to the above listed compositions specifically for use in refrigeration or air conditioning systems employing a single pass/single slab heat exchanger. The present invention further relates to azeotropic or near azeotropic refrigerant compositions. These compositions are useful in refrigeration or air conditioning systems. The compositions are also useful in refrigeration or air conditioning systems employing a centrifugal compressor. The present invention further relates to processes for producing refrigeration, heat, and transfer of heat from a heat source to a heat sink using the present inventive compositions.
DETAILED DESCRIPTION OF THE INVENTION Applicants specifically incorporate the entire contents of all cited references in this disclosure. Further, when an amount, concentration, or other value or parameter is given as either a range, preferred range, or a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. Where a range of numerical values is recited herein, unless otherwise stated, the range is intended to include the endpoints thereof, and all integers and fractions within the range. It is not intended that the scope of the invention be limited to the specific values recited when defining a range. The refrigerant compositions of the present invention comprising 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (PEIK) and at least one chlorocarbon, alcohol, ketone, ether, ester, N- (difluoromethyl)-N,N-dimethylamine, 1 ,1 ,1 ,2,2-pentafluoro-2-
[(pentafluoroethyl)thio]ethane or mixtures thereof. The refrigerant compositions of the present invention may comprise a mixture of PEIK with combinations of any of the listed components. The refrigerant compositions of the present invention comprise compounds selected from chlorocarbons, alcohols, ethers, ketones, esters, N-(difluoromethyl)-N,N-dimethylamine, or 1 ,1 ,1 ,2,2-pentafluoro-2- [(pentafluoroethyl)thio]ethane. Representative chlorocarbons, alcohols, ethers, ketones, and esters are listed in Table 1. Representative compounds that may be components of the compositions of the present invention are listed in Table 1. TABLE 1
The compounds listed in Table 1 are available commercially (from chemical supply houses such as Aldrich, Milwaukee, Wisconsin) or may be prepared by processes known in the art. 1,1,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone (PEIK) is commercially available from 3M™ (St. Paul, Minnesota). Compositions of the present invention have low or zero ozone depletion potential and low global warming potential . For example, PEIK and the other compounds of the present invention, alone or in mixtures will have global warming potentials lower than many HFC refrigerants currently in use. The compositions of the present invention that are mixtures may be prepared by any convenient method to combine the desired amounts of the individual components. A preferred method is to weigh the desired component amounts and thereafter combine the components in an appropriate vessel. Agitation may be used, if desired. The refrigerant or heat transfer compositions of the present invention include: 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N-(difluoromethyl)-N,N-dimethylamine; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1,1- dichloroethane;
1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans- 1 ,2-dichloroethylene; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and acetone; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and diisopropyl ether; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,2- dimethoxyethane; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and dimethoxymethane; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1- dimethoxyethane; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethanol; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethyl formate; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and isopropanol; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methanol; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl acetate; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl formate; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and tert- butylmethyl ether; and ,1 ,1 ,2,2,4,5,5, 5-nonafiuoro-4-(trifluoromethyl)-3-pentanone and n- propanol.
The refrigerant or heat transfer compositions of the present invention may be azeotropic or near azeotropic compositions. An azeotropic composition is a liquid admixture of two or more substances that has a constant boiling point that may be above or below the boiling points of the individual components. As such an azeotropic composition will not fractionate within the refrigeration or air conditioning system during operation, which may reduce efficiency of the system. Additionally, an azeotropic composition will not fractionate upon leakage from the refrigeration or air conditioning system. In the situation where one component of a mixture is flammable, fractionation during leakage could
lead to a flammable composition either within the system or outside of the system. A near azeotropic composition is a substantially constant boiling, liquid admixture of two or more substances that behaves essentially as a single substance. One way to characterize a near azeotropic composition is that the vapor produced by partial evaporation or distillation of the liquid has substantially the same composition as the liquid from which it was evaporated or distilled, that is, the admixture distills/refluxes without substantial composition change. Another way to characterize a near azeotropic composition is that the bubble point vapor pressure and the dew point vapor pressure of the composition at a particular temperature are substantially the same. Herein, a composition is near azeotropic if, after 50 weight percent of the composition is removed, such as by evaporation or boiling off, the difference in vapor pressure between the original composition and the composition remaining after 50 weight percent of the original composition has been removed is less than about 10 percent. The azeotropic refrigerant compositions of the present invention are listed in Table 2. TABLE 2
Azeotrope Azeotrope Component A Component B Concentration BP (°C) Wt% A Wt% B PEIK N(CH3)2(CHF2) 70.2 29.8 38.1 PEIK 1 ,1-dichloroethane 78.7 21.3 38.2 PEIK t-DCE 72.0 28.0 31.8 PEIK diisopropyl ether 85.3 14.7 40.3 PEIK 1 ,2-dimethoxyethane 92.6 7.4 42.0 PEIK dimethoxymethane 79.5 20.5 29.6 PEIK 1 , 1 -dimethoxyethane 85.5 14.5 44.4 PEIK ethanol 96.8 3.2 44.7 PEIK ethyl formate 82.3 17.7 34.1 PEIK isopropanol 96.7 3.3 45.6 PEIK methanol 97.0 3.0 43.5 PEIK methyl acetate 84.4 15.6 35.4 PEIK methyl formate 73.2 26.8 22.6 PEIK tert-butyl methyl ether 83.3 16.7 35.3 PEIK n-propanol 98.4 1.6 47.6
The near azeotropic refrigerant compositions and concentration ranges of the present invention are listed in Table 3.
TABLE 3
Near Azeotropic Concentration Range
Compounds (A B) wt% A/wt% B
PEIK/ N(CH3) 2(CHF2) 43-91/57-9 PEIK/ CF3CF2SCF2CF3 1-99/99-1 PEIK/1 ,1-dichloroethane 55-91/45-9 PEIK/t-DCE 48-87/52-12 PEIK/acetone 1-99/99-1 PEIK/diisopropyl ether 63-94/37-6 PEIK/1 ,2-dimethoxyethane 73-96/27-4 PEIK/dimethoxymethane 60-92/40-8 PEIK/1 ,1-dimethoxyethane 61-99/39-1 PEIK/ethanol 87-99/13-1 PEIK/ethyl formate 61-92/39-8 PEIK/isopropanol 85-99/15-1 PEIK/methanol 91-99/9-1 PEIK/methyl acetate 63-93/37-7 PEIK/methyl formate 53-90/47-10 PEIK/tert-butyl methyl ether 63-92/37-8 PEIK n-propanol 87-99/13-1
The compositions of the present invention may further comprise about 0.01 weight percent to about 5 weight percent of a stabilizer, free radical scavenger or antioxidant. Such additives include but are not limited to, nitromethane, hindered phenols, hydroxylamines, thiols, phosphites, or lactones. Single additives or combinations may be used. The compositions of the present invention may further comprise about 0.01 weight percent to about 5 weight percent of a water scavenger (drying compound). Such water scavengers may comprise ortho esters such as trimethyl-, triethyl-, or tripropylortho formate. The compositions of the present invention may further comprise an ultra-violet (UV) dye and optionally a solubilizing agent. The UV dye is a useful component for detecting leaks of the refrigerant composition by permitting one to observe the fluorescence of the dye in the refrigerant or heat transfer fluid composition at a leak point in or the
vicinity of refrigeration or air-conditioning apparatus. One may observe the fluorosence of the dye under an ultra-violet light. Solubilizing agents may be needed due to poor solubility of such UV dyes in some refrigerants. By "ultra-violet" dye is meant a UV fluorescent composition that absorbs light in the ultra-violet or "near" ultra-violet region of the electromagnetic spectrum. The fluorescence produced by the UV fluorescent dye under illumination by a UV light that emits radiation with wavelength anywhere from 10 nanometer to 750 nanometer may be detected. Therefore, if refrigerant containing such a UV fluorescent dye is leaking from a given point in a refrigeration or air conditioning apparatus, the fluorescence can be detected at the leak point. Such UV fluorescent dyes include but are not limited to naphthalimides, perylenes, coumarins, anthracenes, phenanthracenes, xanthenes, thioxanthenes, naphthoxanthenes, fluoresceins, and derivatives or combinations thereof. Solubilizing agents of the present invention comprise at least one compound selected from the group consisting of hydrocarbons, hydrocarbon ethers, polyoxyalkylene glycol ethers, amides, nitriles, ketones, chlorocarbons, esters, lactones, aryl ethers, fluoroethers and 1 ,1 ,1-trifluoroalkanes. Hydrocarbon solubilizing agents of the present invention comprise hydrocarbons including straight chained, branched chain or cyclic alkanes or alkenes containing 5 or fewer carbon atoms and only hydrogen with no other functional groups. Representative hydrocarbon solubilizing agents comprise propane, propylene, cyclopropane, n-butane, isobutane, and n-pentane. It should be noted that if the refrigerant is a hydrocarbon, then the solubilizing agent may not be the same hydrocarbon. Hydrocarbon ether solubilizing agents of the present invention comprise ethers containing only carbon, hydrogen and oxygen, such as dimethyl ether (DME). Polyoxyalkylene glycol ether solubilizing agents of the present invention are represented by the formula R1[(OR2)xOR3]y, wherein: x is an integer from 1-3; y is an integer from 1-4; R1 is selected from hydrogen and aliphatic hydrocarbon radicals having 1 to 6 carbon atoms and y bonding sites; R2 is selected from aliphatic hydrocarbylene radicals having from 2 to 4 carbon atoms; R3 is selected from hydrogen and aliphatic and
alicyclic hydrocarbon radicals having from 1 to 6 carbon atoms; at least one of R1 and R3 is said hydrocarbon radical; and wherein said polyoxyalkylene glycol ethers have a molecular weight of from about 100 to about 300 atomic mass units. In the present polyoxyalkylene glycol ether solubilizing agents represented by R1[(OR2)xOR3]y: x is preferably 1- 2; y is preferably 1 ; R1 and R3 are preferably independently selected from hydrogen and aliphatic hydrocarbon radicals having 1 to 4 carbon atoms; R2 is preferably selected from aliphatic hydrocarbylene radicals having from 2 or 3 carbon atoms, most preferably 3 carbon atoms; the polyoxyalkylene glycol ether molecular weight is preferably from about 100 to about 250 atomic mass units, most preferably from about 125 to about 250 atomic mass units. The R1 and R3 hydrocarbon radicals having 1 to 6 carbon atoms may be linear, branched or cyclic. Representative R1 and R3 hydrocarbon radicals include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, terf-butyl, pentyl, isopentyl, neopentyl, fe/f-pentyl, cyclopentyl, and cyclohexyl. Where free hydroxyl radicals on the present polyoxyalkylene glycol ether solubilizing agents may be incompatible with certain compression refrigeration apparatus materials of construction (e.g. Mylar®), R1 and R3 are preferably aliphatic hydrocarbon radicals having 1 to 4 carbon atoms, most preferably 1 carbon atom. The R2 aliphatic hydrocarbylene radicals having from 2 to 4 carbon atoms form repeating oxyalkylene radicals - (OR2)x - that include oxyethylene radicals, oxypropylene radicals, and oxybutylene radicals. The oxyalkylene radical comprising R2 in one polyoxyalkylene glycol ether solubilizing agent molecule may be the same, or one molecule may contain different R2 oxyalkylene groups. The present polyoxyalkylene glycol ether solubilizing agents preferably comprise at least one oxypropylene radical. Where R1 is an aliphatic or alicyclic hydrocarbon radical having 1 to 6 carbon atoms and y bonding sites, the radical may be linear, branched or cyclic. Representative R1 aliphatic hydrocarbon radicals having two bonding sites include, for example, an ethylene radical, a propylene radical, a butylene radical, a pentylene radical, a hexylene radical, a cyclopentylene radical and a cyclohexylene radical. Representative R1 aliphatic hydrocarbon radicals having three or four bonding sites include residues derived from polyalcohols, such as trimethylolpropane, glycerin, pentaerythritol, 1 ,2,3- trihydroxycyclohexane and 1 ,3,5-trihydroxycyclohexane, by removing their hydroxyl radicals.
Representative polyoxyalkylene glycol ether solubilizing agents include but are not limited to: CH3OCH2CH(CH3)0(H or CH3) (propylene glycol methyl (or dimethyl) ether), CH3θ[CH2CH(CH3)0]2(H or CH3) (dipropylene glycol methyl (or dimethyl) ether), CH30[CH2CH(CH3)0]3(H or CH3) (tripropylene glycol methyl (or dimethyl) ether),
C2H5OCH2CH(CH3)0(H or C2H5) (propylene glycol ethyl (or diethyl) ether), C2H5θ[CH2CH(CH3)0]2(H or C2H5) (dipropylene glycol ethyl (or diethyl) ether), C2H50[CH2CH(CH3)0]3(H or C2H5) (tripropylene glycol ethyl (or diethyl) ether), C3H7OCH2CH(CH3)0(H or C3H7) (propylene glycol n-propyl (or di-n-propyl) ether), C3H7θ[CH2CH(CH3)0]2(H or C3H7) (dipropylene glycol n-propyl (or di-n-propyl) ether) , C3H70[CH2CH(CH3)0]3(H or C3H7) (tripropylene glycol n-propyl (or di-n-propyl) ether), C4HgOCH2CH(CH3)OH (propylene glycol n-butyl ether), C4H90[CH2CH(CH3)0]2(H or C4H9) (dipropylene glycol n-butyl (or di-n-butyl) ether), C4H90[CH2CH(CH3)0]3(H or C4H9) (tripropylene glycol n-butyl (or di-n-butyl) ether), (CH3)3COCH2CH(CH3)OH (propylene glycol t-butyl ether), (CH )3CO[CH2CH(CH3)0]2(H or (CH3)3) (dipropylene glycol t-butyl (or di-t- butyl) ether), (CH3)3CO[CH2CH(CH3)0]3(H or (CH3)3) (tripropylene glycol t- butyl (or di-t-butyl) ether), C5H11OCH2CH(CH3)OH (propylene glycol n- pentyl ether), C4H9OCH2CH(C2H5)OH (butylene glycol n-butyl ether), C4H90[CH2CH(C2H5)0]2H (dibutylene glycol n-butyl ether), trimethylolpropane tri-n-butyl ether (C2H5C(CH20(CH2)3CH3)3) and trimethylolpropane di-n-butyl ether (C2H5C(CH2OC(CH2)3CH3)2CH2OH). Amide solubilizing agents of the present invention comprise those represented by the formulae R1CONR2R3 and cyclo-[R4CON(R5)-], wherein R1, R2, R3 and R5are independently selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms; R4 is selected from aliphatic hydrocarbylene radicals having from 3 to 12 carbon atoms; and wherein said amides have a molecular weight of from about 100 to about 300 atomic mass units. The molecular weight of said amides is preferably from about 160 to about 250 atomic mass units. R1, R2, R3 and R5 may optionally include substituted hydrocarbon radicals, that is, radicals containing non-hydrocarbon substituents selected from halogens (e.g., fluorine, chlorine) and alkoxides (e.g. methoxy). R1, R2, R3 and R5 may optionally include heteroatom-substituted hydrocarbon radicals, that is, radicals, which contain the atoms nitrogen (aza-), oxygen (oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms. In
general, no more than three non-hydrocarbon substituents and heteroatoms, and preferably no more than one, will be present for each 10 carbon atoms in R1"3, and the presence of any such non-hydrocarbon substituents and heteroatoms must be considered in applying the aforementioned molecular weight limitations. Preferred amide solubilizing agents consist of carbon, hydrogen, nitrogen and oxygen. Representative R1, R2, R3 and R5 aliphatic and alicyclic hydrocarbon radicals include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, ferf-butyl, pentyl, isopentyl, neopentyl, terf-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers. A preferred embodiment of amide solubilizing agents are those wherein R4 in the aforementioned formula cyclo-[R4CON(R5)-] may be represented by the hydrocarbylene radical (CR6R7)n, in other words, the formula: cyclo- [(CR6R7)nCON(R5)-] wherein: the previously-stated values for molecular weight apply; n is an integer from 3 to 5; R5 is a saturated hydrocarbon radical containing 1 to 12 carbon atoms; R6 and R7are independently selected (for each n) by the rules previously offered defining R1"3. In the lactams represented by the formula: cyclo-[(CR6R7)nCON(R5)-], all R6 and R7 are preferably hydrogen, or contain a single saturated hydrocarbon radical among the n methylene units, and R5 is a saturated hydrocarbon radical containing 3 to 12 carbon atoms. For example, 1 -(saturated hydrocarbon radical)-5-methylpyrrolidin-2-ones. Representative amide solubilizing agents include but are not limited to: 1-octylpyrrolidin-2-one, 1-decylpyrrolidin-2-one, 1-octyl-5- methylpyrrolidin-2-one, 1-butylcaprolactam, 1-cyclohexylpyrrolidin-2-one, 1 -butyl-5-methylpiperid-2-one, 1 -pentyl-5-methylpiperid-2-one, 1 - hexylcaprolactam, 1-hexyl-5-methylpyrrolidin-2-one, 5-methyl-1- pentylpiperid-2-one, 1 ,3-dimethylpiperid-2-one, 1-methylcaprolactam, 1- butyl-pyrrolidin-2-one, 1 ,5-dimethylpiperid-2-one, 1-decyl-5- methylpyrrolidin-2-one, 1-dodecylpyrrolid-2-one, N,N-dibutylformamide and N,N-diisopropylacetamide. Ketone solubilizing agents of the present invention comprise ketones represented by the formula R1COR2, wherein R1 and R2 are independently selected from aliphatic, alicyclic and aryl hydrocarbon radicals having from 1 to 12 carbon atoms, and wherein said ketones have a molecular weight of from about 70 to about 300 atomic mass units. R1 and R2 in said ketones are preferably independently selected from
aliphatic and alicyclic hydrocarbon radicals having 1 to 9 carbon atoms. The molecular weight of said ketones is preferably from about 100 to 200 atomic mass units. R1 and R2 may together form a hydrocarbylene radical connected and forming a five, six, or seven-membered ring cyclic ketone, for example, cyclopentanone, cyclohexanone, and cycloheptanone. R1 and R2 may optionally include substituted hydrocarbon radicals, that is, radicals containing non-hydrocarbon substituents selected from halogens (e.g., fluorine, chlorine) and alkoxides (e.g. methoxy). R and R2 may optionally include heteroatom-substituted hydrocarbon radicals, that is, radicals, which contain the atoms nitrogen (aza-), oxygen (keto-, oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms. In general, no more than three non-hydrocarbon substituents and heteroatoms, and preferably no more than one, will be present for each 10 carbon atoms in R1 and R2, and the presence of any such non- hydrocarbon substituents and heteroatoms must be considered in applying the aforementioned molecular weight limitations. Representative R1 and R2 aliphatic, alicyclic and aryl hydrocarbon radicals in the general formula R1COR2 include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, fetf-butyl, pentyl, isopentyl, neopentyl, fe/f-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers, as well as phenyl, benzyl, cumenyl, mesityl, tolyl, xylyl and phenethyl. Representative ketone solubilizing agents include but are not limited to: 2-butanone, 2-pentanone, acetophenone, butyrophenone, hexanophenone, cyclohexanone, cycloheptanone, 2-heptanone, 3- heptanone, 5-methyl-2-hexanone, 2-octanone, 3-octanone, diisobutyl ketone, 4-ethylcyclohexanone, 2-nonanone, 5-nonanone, 2-decanone, 4- decanone, 2-decalone, 2-tridecanone, dihexyl ketone and dicyclohexyl ketone. Nitrile solubilizing agents of the present invention comprise nitriles represented by the formula R1CN, wherein R1 is selected from aliphatic, alicyclic or aryl hydrocarbon radicals having from 5 to 12 carbon atoms, and wherein said nitriles have a molecular weight of from about 90 to about 200 atomic mass units. R1 in said nitrile solubilizing agents is preferably selected from aliphatic and alicyclic hydrocarbon radicals having 8 to 10 carbon atoms. The molecular weight of said nitrile solubilizing agents is preferably from about 120 to about 140 atomic mass
units. R1 may optionally include substituted hydrocarbon radicals, that is, radicals containing non-hydrocarbon substituents selected from halogens (e.g., fluorine, chlorine) and alkoxides (e.g. methoxy). R1 may optionally include heteroatom-substituted hydrocarbon radicals, that is, radicals, which contain the atoms nitrogen (aza-), oxygen (keto-, oxa-) or sulfur (thia-) in a radical chain otherwise composed of carbon atoms. In general, no more than three non-hydrocarbon substituents and heteroatoms, and preferably no more than one, will be present for each 10 carbon atoms in R1, and the presence of any such non-hydrocarbon substituents and heteroatoms must be considered in applying the aforementioned molecular weight limitations. Representative R1 aliphatic, alicyclic and aryl hydrocarbon radicals in the general formula R1CN include pentyl, isopentyl, neopentyl, ferf-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers, as well as phenyl, benzyl, cumenyl, mesityl, tolyl, xylyl and phenethyl.
Representative nitrile solubilizing agents include but are not limited to: 1- cyanopentane, 2,2-dimethyl-4-cyanopentane, 1 -cyanohexane, 1- cyanoheptane, 1-cyanooctane, 2-cyanooctane, 1-cyanononane, 1- cyanodecane, 2-cyanodecane, 1-cyanoundecane and 1-cyanododecane. Chlorocarbon solubilizing agents of the present invention comprise chlorocarbons represented by the formula RCIX, wherein; x is selected from the integers 1 or 2; R is selected from aliphatic and alicyclic hydrocarbon radicals having 1 to 12 carbon atoms; and wherein said chlorocarbons have a molecular weight of from about 100 to about 200 atomic mass units. The molecular weight of said chlorocarbon solubilizing agents is preferably from about 120 to 150 atomic mass units. Representative R aliphatic and alicyclic hydrocarbon radicals in the general formula RCIX include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, terf-butyl, pentyl, isopentyl, neopentyl, terf-pentyl, cyclopentyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and their configurational isomers. Representative chlorocarbon solubilizing agents include but are not limited to: 3-(chloromethyl)pentane, 3-chloro-3-methylpentane, 1- chlorohexane, 1,6-dichlorohexane, 1-chloroheptane, 1-chlorooctane, 1- chlorononane, 1 -chlorodecane, and 1 , 1 , 1 -trichlorodecane. Ester solubilizing agents of the present invention comprise esters represented by the general formula R1C02R2, wherein R1 and R2
are independently selected from linear and cyclic, saturated and unsaturated, alkyl and aryl radicals. Preferred esters consist essentially of the elements C, H and O, have a molecular weight of from about 80 to about 550 atomic mass units. Representative esters include but are not limited to: (CH3)2CHCH2OOC(CH2)2-4OCOCH2CH(CH3)2 (diisobutyl dibasic ester), ethyl hexanoate, ethyl heptanoate, n-butyl propionate, n-propyl propionate, ethyl benzoate, di-n-propyl phthalate, benzoic acid ethoxyethyl ester, dipropyl carbonate, "Exxate 700" (a commercial C7 alkyl acetate), "Exxate 800" (a commercial C8 alkyl acetate), dibutyl phthalate, and tert-butyl acetate. Lactone solubilizing agents of the present invention comprise lactones represented by structures [A], [B], and [C]:
[A] [B] [C]
These lactones contain the functional group -C02- in a ring of six (A), or preferably five atoms (B), wherein for structures [A] and [B], Ri through Rs are independently selected from hydrogen or linear, branched, cyclic, bicyclic, saturated and unsaturated hydrocarbyl radicals. Each Ri though R8 may be connected forming a ring with another R-i through R8. The lactone may have an exocyclic alkylidene group as in structure [C], wherein Ri through Re are independently selected from hydrogen or linear, branched, cyclic, bicyclic, saturated and unsaturated hydrocarbyl radicals. Each Ri though R6 may be connected forming a ring with another Ri through R6. The lactone solubilizing agents have a molecular weight range of from about 80 to about 300 atomic mass units, preferred from about 80 to about 200 atomic mass units.
Representative lactone solubilizing agents include but are not limited to the compounds listed in Table 4. TABLE 4
Lactone solubilizing agents generally have a kinematic viscosity of less than about 7 centistokes at 40°C. For instance, gamma- undecalactone has kinematic viscosity of 5.4 centistokes and cis-(3-hexyl- 5-methyl)dihydrofuran-2-one has viscosity of 4.5 centistokes both at 40°C. Lactone solubilizing agents may be available commercially or prepared by methods as described in U. S. provisional patent application 10/910,495 (inventors being P. J. Fagan and C. J. Brandenburg), filed August 3, 2004, incorporated herein by reference. Aryl ether solubilizing agents of the present invention further comprise aryl ethers represented by the formula R1OR2, wherein: R1 is selected from aryl hydrocarbon radicals having from 6 to 12 carbon atoms; R2 is selected from aliphatic hydrocarbon radicals having from 1 to 4 carbon atoms; and wherein said aryl ethers have a molecular weight of from about 100 to about 150 atomic mass units. Representative R1 aryl radicals in the general formula R1OR2 include phenyl, biphenyl, cumenyl, mesityl, tolyl, xylyl, naphthyl and pyridyl. Representative R2 aliphatic hydrocarbon radicals in the general formula R1OR2 include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and terf-butyl. Representative aromatic ether solubilizing agents include but are not limited to: methyl phenyl ether (anisole), 1 ,3-dimethyoxybenzene, ethyl phenyl ether and butyl phenyl ether. Fluoroether solubilizing agents of the present invention comprise those represented by the general formula R1OCF2CF2H, wherein R is selected from aliphatic and alicyclic hydrocarbon radicals having from about 5 to about 15 carbon atoms, preferably primary, linear, saturated, alkyl radicals. Representative fluoroether solubilizing agents include but are not limited to: C8H17OCF2CF2H and C6H13OCF2CF2H. It should be noted that if the refrigerant is a fluoroether, then the solubilizing agent may not be the same fluoroether. Fluoroether solubilizing agents may further comprise ethers derived from fluoro-olefins and polyols. The fluoro-olefins may be of the type CF2=CXY, wherein X is hydrogen, chlorine or fluorine, and Y is
chlorine, fluorine, CF3 or ORf, wherein Rf is CF3, C2F5, or C3F7. Representative fluoro-olefins are tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, and perfluoromethylvinyl ether. The polyols may be of the type HOCH2CRR'(C H2)z(CHOH)xCH2(CH2OH)y, wherein R and R' are hydrogen or CH3 or C2H5 and wherein x is an integer from 0-4, y is an integer from 0-3 and z is either zero or 1. Representative polyols are trimethylol propane, pentaerythritol, butane diol, and ethylene glycol. 1 ,1 ,1-Trifluoroalkane solubilizing agents of the present invention comprise 1 ,1 ,1 -trif luoroalkanes represented by the general formula CF3R1, wherein R1 is selected from aliphatic and alicyclic hydrocarbon radicals having from about 5 to about 15 carbon atoms, preferably primary, linear, saturated, alkyl radicals. Representative 1 ,1 ,1- trifluoroalkane solubilizing agents include but are not limited to: 1 ,1 ,1- trif luorohexane and 1 ,1 ,1 -trif luorododecane. Solubilizing agents of the present invention may be present as a single compound, or may be present as a mixture of more than one solubilizing agent. Mixtures of solubilizing agents may contain two solubilizing agents from the same class of compounds, say two lactones, or two solubilizing agents from two different classes, such as a lactone and a polyoxyalkylene glycol ether. In the present compositions comprising refrigerant and UV fluorescent dye, from about 0.001 weight percent to about 1.0 weight percent of the composition is UV dye, preferably from about 0.005 weight percent to about 0.5 weight percent, and most preferably from 0.01 weight percent to about 0.25 weight percent. Solubility of these UV fluorescent dyes in refrigerants may be poor. Therefore, methods for introducing these dyes into the refrigeration or air conditioning apparatus have been awkward, costly and time consuming. US patent no. RE 36,951 describes a method, which utilizes a dye powder, solid pellet or slurry of dye that may be inserted into a component of the refrigeration or air conditioning apparatus. As refrigerant and lubricant are circulated through the apparatus, the dye is dissolved or dispersed and carried throughout the apparatus. Numerous other methods for introducing dye into a refrigeration or air conditioning apparatus are described in the literature.
Ideally, the UV fluorescent dye could be dissolved in the refrigerant itself thereby not requiring any specialized method for introduction to the refrigeration or air conditioning apparatus. The present invention relates to compositions including UV fluorescent dye, which may be introduced into the system in the refrigerant. The inventive compositions will allow the storage and transport of dye-containing refrigerant even at low temperatures while maintaining the dye in solution. In the present compositions comprising refrigerant, UV fluorescent dye and solubilizing agent, from about 1 to about 50 weight percent, preferably from about 2 to about 25 weight percent, and most preferably from about 5 to about 15 weight percent of the combined composition is solubilizing agent in the refrigerant. In the compositions of the present invention the UV fluorescent dye is present in a concentration from about 0.001 weight percent to about 1.0 weight percent in the refrigerant, preferably from 0.005 weight percent to about 0.5 weight percent, and most preferably from 0.01 weight percent to about 0.25 weight percent. Optionally, commonly used refrigeration system additives may be added, as desired, to compositions of the present invention in order to enhance performance and system stability. These additives are known within the field of refrigeration, and include, but are not limited to, anti wear agents, extreme pressure lubricants, corrosion and oxidation inhibitors, metal surface deactivators, free radical scavengers, and foam control agents,. In general, these additives are present in the inventive compositions in small amounts relative to the overall composition.
Typically concentrations of from less than about 0.1 weight percent to as much as about 3 weight percent of each additive are used. These additives are selected on the basis of the individual system requirements. These additives include members of the triaryl phosphate family of EP (extreme pressure) lubricity additives, such as butylated triphenyl phosphates (BTPP), or other alkylated triaryl phosphate esters, e.g. Syn- 0-Ad 8478 from Akzo Chemicals, tricresyl phosphates and related compounds. Additionally, the metal dialkyl dithiophosphat.es (e.g. zinc dialkyl dithiophosphate (or ZDDP), Lubrizol 1375 and other members of this family of chemicals may be used in compositions of the present invention. Other antiwear additives include natural product oils and asymmetrical polyhydroxyl lubrication additives, such as Synergol TMS
(International Lubricants). Similarly, stabilizers such as anti oxidants, free radical scavengers, and water scavengers may be employed. Compounds in this category can include, but are not limited to, butylated hydroxy toluene (BHT) and epoxides. Solubilizing agents such as ketones may have an objectionable odor, which can be masked by addition of an odor masking agent or fragrance. Typical examples of odor masking agents or fragrances may include Evergreen, Fresh Lemon, Cherry, Cinnamon, Peppermint, Floral or Orange Peel, all available commercially, as well as d-limonene and pinene. Such odor masking agents may be used at concentrations of from about 0.001 % to as much as about 15% by weight based on the combined weight of odor masking agent and solubilizing agent. The present invention further relates to a method of using the refrigerant or heat transfer fluid compositions further comprising ultraviolet fluorescent dye, and optionally, solubilizing agent, in refrigeration or air conditioning apparatus. The method comprises introducing the refrigerant or heat transfer fluid composition into the refrigeration or air conditioning apparatus. This may be done by dissolving the UV fluorescent dye in the refrigerant or heat transfer fluid composition in the presence of a solubilizing agent and introducing the combination into the apparatus. Alternatively, this may be done by combining solubilizing agent and UV fluorescent dye and introducing said combination into refrigeration or air conditioning apparatus containing refrigerant and/or heat transfer fluid. The resulting composition may be used in the refrigeration or air conditioning apparatus. The present invention further relates to a method of using the refrigerant or heat transfer fluid compositions comprising ultraviolet fluorescent dye to detect leaks. The presence of the dye in the compositions allows for detection of leaking refrigerant in the refrigeration or air conditioning apparatus. Leak detection helps to address, resolve or prevent inefficient operation of the apparatus or system or equipment failure. Leak detection also helps one contain chemicals used in the operation of the apparatus. The method comprises providing the composition comprising refrigerant, ultra-violet fluorescent dye as described herein, and optionally, a solubilizing agent as described herein, to refrigeration and air conditioning apparatus and employing a sutiable means for detecting the
UV fluorescent dye-containing refrigerant. Suitable means for detecting the dye include, but are not limited to, ultra-violet lamp, often referred to as a "black light" or "blue light". Such ultra-violet lamps are commercially available from numerous sources specifically designed for this purpose. Once the ultra-violet fluorescent dye containing composition has been introduced to the refrigeration or air conditioning apparatus and has been allowed to circulate throughout the system, a leak can be found by shining said ultra-violet lamp on the apparatus and observing the fluorescence of the dye in the vicinity of any leak point. The present invention further relates to a method of using the compositions of the present invention for producing refrigeration or heat, wherein the method comprises producing refrigeration by evaporating said composition in the vicinity of a body to be cooled and thereafter condensing said composition; or producing heat by condensing said composition in the vicinity of the body to be heated and thereafter evaporating said composition. Mechanical refrigeration is primarily an application of thermodynamics wherein a cooling medium, such as a refrigerant, goes through a cycle so that it can be recovered for reuse. Commonly used cycles include vapor-compression, absorption, steam-jet or steam-ejector, and air. Vapor-compression refrigeration systems include an evaporator, a compressor, a condenser, and an expansion device. A vapor-compression cycle re-uses refrigerant in multiple steps producing a cooling effect in one step and a heating effect in a different step. The cycle can be described simply as follows. Liquid refrigerant enters an evaporator through an expansion device, and the liquid refrigerant boils in the evaporator at a low temperature to form a gas and produce cooling. The low-pressure gas enters a compressor where the gas is compressed to raise its pressure and temperature. The higher-pressure (compressed) gaseous refrigerant then enters the condenser in which the refrigerant condenses and discharges its heat to the environment. The refrigerant returns to the expansion device through which the liquid expands from the higher-pressure level in the condenser to the low-pressure level in the evaporator, thus repeating the cycle. There are various types of compressors that may be used in refrigeration applications. Compressors can be generally classified as
reciprocating, rotary, jet, centrifugal, scroll, screw or axial-flow, depending on the mechanical means to compress the fluid, or as positive- displacement (e.g., reciprocating, scroll or screw) or dynamic (e.g., centrifugal or jet), depending on how the mechanical elements act on the fluid to be compressed. Either positive displacement or dynamic compressors may be used in the present inventive process. A centrifugal type compressor is the preferred equipment for the present refrigerant compositions. A centrifugal compressor uses rotating elements to accelerate the refrigerant radially, and typically includes an impeller and diffuser housed in a casing. Centrifugal compressors usually take fluid in at an impeller eye, or central inlet of a circulating impeller, and accelerate it radially outward. Some static pressure rise occurs in the impeller, but most of the pressure rise occurs in the diffuser section of the casing, where velocity is converted to static pressure. Each impeller-diffuser set is a stage of the compressor. Centrifugal compressors are built with from 1 to 12 or more stages, depending on the final pressure desired and the volume of refrigerant to be handled. The pressure ratio, or compression ratio, of a compressor is the ratio of absolute discharge pressure to the absolute inlet pressure.
Pressure delivered by a centrifugal compressor is practically constant over a relatively wide range of capacities. Positive displacement compressors draw vapor into a chamber, and the chamber decreases in volume to compress the vapor. After being compressed, the vapor is forced from the chamber by further decreasing the volume of the chamber to zero or nearly zero. A positive displacement compressor can build up a pressure, which is limited only by the volumetric efficiency and the strength of the parts to withstand the pressure. Unlike a positive displacement compressor, a centrifugal compressor depends entirely on the centrifugal force of the high-speed impeller to compress the vapor passing through the impeller. There is no positive displacement, but rather what is called dynamic-compression. The pressure a centrifugal compressor can develop depends on the tip speed of the impeller. Tip speed is the speed of the impeller measured at its tip and is related to the diameter of the impeller and its revolutions per minute. The capacity of the centrifugal compressor is
determined by the size of the passages through the impeller. This makes the size of the compressor more dependent on the pressure required than the capacity. Because of its high-speed operation, a centrifugal compressor is fundamentally a high volume, low-pressure machine. A centrifugal compressor works best with a low-pressure refrigerant, such as trichlorofluoromethane (CFC-11) or 1 ,2,2-trichlorotrifluoroethane (CFC- 113). Large centrifugal compressors typically operate at 3000 to 7000 revolutions per minute (rpm). Small turbine centrifugal compressors are designed for high speeds, from about 40,000 to about 70,000 (rpm), and have small impeller sizes, typically less than 0.15 meters. A multi-stage impeller may be used in a centrifugal compressor to improve compressor efficiency thus requiring less power in use. For a two-stage system, in operation, the discharge of the first stage impeller goes to the suction intake of a second impeller. Both impellers may operate by use of a single shaft (or axle). Each stage can build up a compression ratio of about 4 to 1; that is, the absolute discharge pressure can be four times the absolute suction pressure. An example of a two- stage centrifugal compressor system, in this case for automotive applications, is described in US 5,065,990, incorporated herein by reference. The compositions of the present invention suitable for use in a refrigeration or air conditioning systems employing a centrifugal compressor comprise at least one of: 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dichloroethane; 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,2-dichloroethylene; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and acetone; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and diisopropyl ether;
1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,2-dimethoxyethane; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and dimethoxymethane; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dimethoxyethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethyl formate; 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and isopropanol; 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl acetate; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl formate; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and tert-butylmethyl ether; or 1,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and n- propanol. These above-listed compositions are also suitable for use in a multi-stage centrifugal compressor, preferably a two-stage centrifugal compressor apparatus. The compositions of the present invention may be used in stationary air-conditioning, heat pumps or mobile air-conditioning and refrigeration systems. Stationary air conditioning and heat pump applications include window, ductless, ducted, packaged terminal, chillers and commercial, including packaged rooftop. Refrigeration applications include domestic or home refrigerators and freezers, ice machines, self- contained coolers and freezers, walk-in coolers and freezers and transport refrigeration systems. The compositions of the present invention may additionally be used in air-conditioning, heating and refrigeration systems that employ fin and tube heat exchangers, microchannel heat exchangers and vertical or horizontal single pass tube or plate type heat exchangers.
Conventional microchannel heat exchangers may not be ideal for the low pressure refrigerant compositions of the present invention. The low operating pressure and density result in high flow velocities and high frictional losses in all components. In these cases, the evaporator design may be modified. Rather than several microchannel slabs connected in series (with respect to the refrigerant path) a single slab/single pass heat exchanger arrangement may be used. Therefore, a preferred heat exchanger for the low pressure refrigerants of the present invention is a single slab/single pass heat exchanger. In addition to two-stage compressor systems, the following compositions of the present invention are suitable for use in refrigeration or air conditioning systems employing a single slab/single pass heat exchanger: 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1,1,1 ,2,2,4,5,5,5-nonafIuoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1,1-dichloroethane; 1 ,1,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,2-dichloroethylene; 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and acetone; 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and diisopropyl ether; 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,2-dimethoxyethane; 1 ,1,1 ^^AS.S.δ-nonafluoro^-ftrifluoromethylJ-S-pentanone and dimethoxymethane; 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dimethoxyethane; 1 ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethyl formate;
,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and n- heptane; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and isopropanol; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methanol; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl acetate; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl formate; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and tert-butylmethyl ether; and ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and n- propanol.
The compositions of the present invention are particularly useful in small turbine centrifugal compressors, which can be used in auto and window air conditioning or heat pumps as well as other applications. These high efficiency miniature centrifugal compressors may be driven by an electric motor and can therefore be operated independently of the engine speed. A constant compressor speed allows the system to provide a relatively constant cooling capacity at all engine speeds. This provides an opportunity for efficiency improvements especially at higher engine speeds as compared to a conventional R-134a automobile air-conditioning system. When the cycling operation of conventional systems at high driving speeds is taken into account, the advantage of these low pressure systems becomes even greater. Some of the low pressure refrigerant fluids of the present invention may be suitable as drop-in replacements for CFC-113 in existing centrifugal equipment. The present invention relates to a process for producing refrigeration comprising evaporating the compositions of the present invention in the vicinity of a body to be cooled, and thereafter condensing said compositions. The present invention further relates to a process for producing heat comprising condensing the compositions of the present invention in
the vicinity of a body to be heated, and thereafter evaporating said compositions. The present invention further relates to a process for transfer of heat from a heat source to a heat sink wherein the compositions of the present invention serve as heat transfer fluids. Said process for heat transfer comprises transferring the compositions of the present invention from a heat source to a heat sink. Heat transfer fluids are utilized to transfer, move or remove heat from one space, location, object or body to a different space, location, object or body by radiation, conduction, or convection. A heat transfer fluid may function as a secondary coolant by providing means of transfer for cooling (or heating) from a remote refrigeration (or heating) system. In some systems, the heat transfer fluid may remain in a constant state throughout the transfer process (i.e., not evaporate or condense). Alternatively, evaporative cooling processes may utilize heat transfer fluids as well. A heat source may be defined as any space, location, object or body from which it is desirable to transfer, move or remove heat. Examples of heat sources may be spaces (open or enclosed) requiring refrigeration or cooling, such as refrigerator or freezer cases in a supermarket, building spaces requiring air conditioning, or the passenger compartment of an automobile requiring air conditioning. A heat sink may be defined as any space, location, object or body capable of absorbing heat. A vapor compression refrigeration system is one example of such a heat sink.
EXAMPLES EXAMPLE 1
Impact of Vapor Leakage
A vessel is charged with an initial composition at a specified temperature, and the initial vapor pressure of the composition is measured. The composition is allowed to leak from the vessel, while the temperature is held constant, until 50 weight percent of the initial composition is removed, at which time the vapor pressure of the composition remaining in the vessel is measured. The results are summarized in Table 5 below. TABLE 5
After 50% After 50% Compounds Initial Initial Leak Leak Delta wt% A/wt% B Psia kPa Psia kPa P %
PEIK /CF3CF2SCF2CF3 (50.0 °C) 0/100 22.71 156.58 22.71 156.58 0.0% 1/99 22.65 156.17 22.64 156.10 0.0% 20/80 21.44 147.82 21.16 145.89 1.3% 40/60 20.06 138.31 19.59 135.07 2.3% 60/40 18.57 128.04 18.04 124.38 2.9% 80/20 16.96 116.94 16.57 114.25 2.3% 99/1 15.32 105.63 15.29 105.42 0.2% 100/0 15.23 105.01 15.23 105.01 0.0%
PEIK /N(CH3)2(CHF2) (38.1 °C) 70.2/29.8 14.68 101.22 14.68 101.22 0.0% 90/10 13.76 94.87 12.60 86.87 8.4% 91/9 13.60 93.77 12.31 84.87 9.5% 92/8 13.40 92.39 12.01 82.81 10.4% 100/0 9.92 68.40 9.92 68.40 0.0% 43/57 14.33 98.80 13.00 89.63 9.3% 42/58 14.31 98.66 12.80 88.25 10.6% 0/100 10.17 70.12 10.17 70.12 0.0% 54/46 14.54 100.25 12.91 89.01 11.2% 0/100 7.47 51.50 7.47 51.50 0.0%
PEIK/t-DCE (31 .8 °C) 72.0/28.0 14.72 101.49 14.72 101.49 0.0% 85/15 14.62 100.80 14.03 96.73 4.0% 87/13 14.56 100.39 13.36 92.11 8.2% 88/12 14.52 100.11 12.82 88.39 11.7% 100/0 7.79 53.71 7.79 53.71 0.0% 60/40 14.70 101.35 14.67 101.15 0.2%
50/50 14.68 101.22 14.61 100.73 0.5% 48/52 14.68 101.22 14.28 98.46 2.7% 0/100 8.34 57.50 8.34 57.50 0.0%
PEIK/acetone (50 °C) 0/100 11.85 81.70 11.85 81.70 0.0% 1/99 11.85 81.70 11.85 81.70 0.0% 20/80 11.90 82.05 11.90 82.05 0.0% 40/60 12.00 82.74 11.99 82.67 0.1% 60/40 12.21 84.19 12.17 83.91 0.3% 80/20 12.76 87.98 12.64 87.15 0.9% 99/1 15.02 103.56 14.97 103.22 0.3% 100/0 15.23 105.01 15.23 105.01 0.0%
PEIK/diisopropyl ether (40.3 °C) 85.3/14.7 14.69 101.28 14.69 101.28 0.0% 90/10 14.66 101.08 14.53 100.18 0.9% 95/5 14.38 99.15 12.23 84.32 15.0% 94/6 14.49 99.91 13.06 90.05 9.9% 100/0 10.77 74.26 10.77 74.26 0.0% 63/37 14.58 100.53 13.17 90.8 9.7% 62/38 14.57 100.46 12.64 87.15 13.2% 0/100 5.68 39.16 5.68 39.16 0.0%
PEIK/1 ,2-dimethoxyethane (42.0 °C) 92.6/7.4 14.69 101.28 14.69 101.28 0.0% 95/5 14.69 101.28 14.69 101.28 0.0% 96/4 14.69 101.28 14.69 101.28 0.0% 100/0 14.47 99.77 14.47 99.77 0.0% 80/20 14.69 101.28 14.60 100.66 0.6% 73/27 14.67 101.15 13.66 94.18 6.9% 72/28 14.67 101.15 13.06 90.05 11.0% 0/100 3.43 23.65 3.43 23.65 0.0%
PEIK/dimethoxymethane (29.6 °C) 79.5/20.5 14.72 101.49 14.72 101.49 0.0% 90/10 14.71 101.42 14.69 101.28 0.1 % 92/8 14.70 101.35 14.69 101.28 0.1% 100/0 7.13 49.16 7.13 49.16 0.0% 60/40 14.66 101.08 13.42 92.53 8.5% 59/41 14.65 101.01 13.04 89.91 11.0% 0/100 8.26 56.95 8.26 56.95 0.0%
PEIK/1 , 1-dimethoxyethane (44.4 °C) 85.5/14.5 14.67 101.15 14.67 101.15 0.0% 95/5 14.14 97.49 13.76 94.87 2.7% 99/1 13.02 89.77 12.75 87.91 2.1 % 100/0 12.51 86.25 12.51 86.25 0.0%
60/40 14.10 97.22 12.67 87.36 10.1% 61/39 14.13 97.42 12.89 88.87 8.8% 0/100 7.49 51.64 7.49 51.64 0.0%
PEIK/ethanol (44.7 °C) 96.8/3.2 14.72 101.49 14.72 101.49 0.0% 99/1 14.55 100.32 13.15 90.67 9.6% 100/0 12.64 87.15 12.64 87.15 0.0% 87/13 14.59 100.60 13.39 92.32 8.2% 86/14 14.57 100.46 12.78 88.12 12.3% 0/100 3.28 22.61 3.28 22.61 0.0%
PEIK/ethyl formate (34.1 °C) 82.3/17.7 14.72 101.49 14.72 101.49 0.0% 90/10 14.69 101.28 14.41 99.35 1.9% 92/8 14.64 100.94 13.55 93.42 7.4% 93/7 14.60 100.66 12.35 85.15 15.4% 100/0 8.52 58.74 8.52 58.74 0.0% 60/40 14.70 101.35 12.95 89.29 11.9% 61/39 14.70 101.35 14.66 101.08 0.3% 0/100 7.11 49.02 7.11 49.02 0.0%
PEIK/isopropanol (45.6 c >C) 96.7/3.3 14.72 101.49 14.72 101.49 0.0% 99/1 14.55 100.32 13.45 92.74 7.6% 100/0 13.06 90.05 13.06 90.05 0.0% 85/15 14.59 100.60 13.56 93.49 7.1% 84/16 14.58 100.53 13.10 90.32 10.2% 0/100 2.72 18.75 2.72 18.75 0.0%
PEIK/methanol (43.5 °C; > 97.0/3.0 14.72 101.49 14.72 101.49 0.0% 99/1 14.51 100.04 13.07 90.12 9.9% 100/0 12.11 83.50 12.11 83.50 0.0% 90/10 14.24 98.18 12.62 87.01 11.4% 91/9 14.35 98.94 13.14 90.60 8.4% 0/100 5.77 39.78 5.77 39.78 0.0%
PEIK/methyl acetate (35.4 °C) 84.4/15.6 14.70 101.35 14.70 101.35 0.0% 90/10 14.69 101.28 14.59 100.60 0.7% 93/7 14.64 100.94 13.55 93.42 7.4% 94/6 14.60 100.66 11.93 82.25 18.3% 100/0 8.96 61.78 8.96 61.78 0.0% 70/30 14.69 101.28 14.67 101.15 0.1% 63/37 14.68 101.22 14.65 101.01 0.2% 0/100 6.52 44.95 6.52 44.95 0.0%
PEIK/methyl formate (22.6 °C) 73.2/26.8 14.72 101.49 14.72 101.49 0.0% 90/10 14.70 101.35 13.77 94.94 6.3% 91/9 14.69 101.28 11.87 81.84 19.2% 100/0 5.35 36.89 5.35 36.89 0.0% 60/40 14.72 101.49 14.72 101.49 0.0% 54/46 14.72 101.49 14.71 101.42 0.1 % 53/47 14.72 101.49 14.71 101.42 0.1% 0/100 9.69 66.81 9.69 66.81 0.0%
PEIK/tert-butyl methyl ether (35.3 °C) 83.3/16.7 14.71 101.42 14.71 101.42 0.0% 90/10 14.71 101.42 14.64 100.94 0.5% 92/8 14.69 101.28 14.22 98.04 3.2% 93/7 14.68 101.22 12.70 87.56 13.5% 100/0 8.92 61.50 8.92 61.50 0.0% 70/30 14.69 101.28 14.52 100.11 1.2% 62/38 14.66 101.08 12.87 88.74 12.2% 63/37 14.66 101.08 13.35 92.05 8.9% 0/100 6.70 46.20 6.7 46.20 0.0%
PEIK/n-propanol (47.6 ° C) 98.4/1.6 14.69 101.28 14.69 101.28 0.0% 99/1 14.67 101.15 14.61 100.73 0.4% 100/0 14.01 96.60 14.01 96.60 0.0% 86/14 14.48 99.84 12.91 89.01 10.8% 87/13 14.49 99.91 13.42 92.53 7.4% 0/100 1.55 10.69 1.55 10.69 0.0%
The results show the difference in vapor pressure between the original composition and the composition remaining after 50 weight percent has been removed is less then about 10 percent for compositions of the present invention. This indicates compositions of the present invention are azeotropic or azeotrope-like. Where an azeotrope is present, the data show compositions of the present invention have an initial vapor pressure higher than the vapor pressure of either pure component.
EXAMPLE 2 Tip Speed to Develop Pressure
Tip speed can be estimated by making some fundamental relationships for refrigeration equipment that use centrifugal compressors. The torque an impeller ideally imparts to a gas is defined as T = m*(v2*r2-vι*r-j ) Equation 1 where T = torque, N*m m = mass rate of flow, kg/s V2 = tangential velocity of refrigerant leaving impeller (tip speed), m/s r2 = radius of exit impeller, m v-j = tangential velocity of refrigerant entering impeller, m/s r-j = radius of inlet of impeller, m
Assuming the refrigerant enters the impeller in an essentially radial direction, the tangential component of the velocity v1 = 0, therefore
T = m*V2*r2 Equation 2
The power required at the shaft is the product of the torque and the rotative speed P = T*w Equation 3 where P = power, W w = rotative speed, rez/s therefore, P = T*w = m*V2*r2*w Equation 4
At low refrigerant flow rates, the tip speed of the impeller and the tangential velocity of the refrigerant are nearly identical; therefore r2*w = V2 Equation 5 and P = m*V2*V2 Equation 6 Another expression for ideal power is the product of the mass rate of flow and the isentropic work of compression,
P = m*Hj*(1000J/kJ) Equation 7 where Hj = Difference in enthalpy of the refrigerant from a saturated vapor at the evaporating conditions to saturated condensing conditions, kJ/kg. Combining the two expressions Equation 6 and 7 produces, V2*V2 = 1000*Hj Equation 8 Although Equation 8 is based on some fundamental assumptions, it provides a good estimate of the tip speed of the impeller and provides an important way to compare tip speeds of refrigerants. Table 6 below shows theoretical tip speeds that are calculated for 1 ,2,2-trichlorotrifluoroethane (CFC-113) and compositions of the present invention. The conditions assumed for this comparison are:
Evaporator temperature 40.0°F (4.4°C) Condenser temperature 110.0°F (43.3°C) Liquid subcool temperature 10.0°F (5.5°C) Return gas temperature 75.0°F (23.8°C) Compressor efficiency is 70%
These are typical conditions under which small turbine centrifugal compressors perform. TABLE 6
The example shows that compounds of the present invention have tip speeds within about +/-20 percent of CFC-113 and would be effective replacements for CFC-113 with minimal compressor design changes. Most preferred compositions have tip speeds within about +/-10 percent of CFC-113.
EXAMPLE 3 Performance Data Table 7 shows the performance of various refrigerants compared to CFC-113. The data are based on the following conditions. Evaporator temperature 40.0°F (4.4°C) Condenser temperature 110.0°F (43.3°C) Subcool temperature 10.0°F (5.5°C) Return gas temperature 75.0°F (23.8°C) Compressor efficiency is 70%
TABLE 7
Claims
What is claimed is : 1. A composition selected from the group consisting of: 1 ,1 ,1 ,2,2,4, 5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1,1-dichloroethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,2-dichloroethylene; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and acetone; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and diisopropyl ether; 1 ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,2-dimethoxyethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and dimethoxymethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 , 1-dimethoxyethane; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and tert-butylmethyl ether; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and isopropanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and n- propanol; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethyl formate; 1 ,1 ,1 ,2,2,4,5, 5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl acetate; and 1 ,1 ,1 ,2,2,4, 5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl formate.
2. A refrigerant or heat transfer fluid composition suitable for use in refrigeration or air conditioning apparatus employing (i) centrifugal compressor, or (ii) multi-stage centrifugal compressor, or (iii) a single slab/single pass heat exchanger, said composition selected from the group consisting of: ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1-dichloroethane; ,1,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and trans-1 ,2-dichloroethylene; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and N- (difluoromethyl)-N,N-dimethylamine; ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,1 ,1 ,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and acetone; ,1,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and diisopropyl ether; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and 1 ,2-dimethoxyethane; ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and dimethoxymethane; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and . 1 , 1-dimethoxyethane; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and tert-butyl methyl ether; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methanol; ,1 ,1 ,2,2,4,5,5, 5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethanol; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and isopropanol; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and n- propanol; ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and ethyl formate; 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl acetate; and 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and methyl formate.
3. An azeotropic or near-azeotropic composition comprising: about 55 to about 91 weight percent 1 ,1 ,1 ,2,2,4, 5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 45 to about 9 weight percent 1 ,1-dichloroethane; about 48 to about 87 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 52 to about 13 weight percent trans-1 ,2-dichloroethylene; about 43 to about 91 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 57 to about 9 weight percent N-(difluoromethyl)-N,N-dimethylamine; about 1 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 99 to about 1 weight percent 1 ,1 ,1 ,2,2-pentafluoro-2- [(pentafluoroethyl)thio]ethane; about 1 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 99 to about 1 weight percent acetone; about 63 to about 94 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 37 to about 6 weight percent diisopropyl ether; about 73 to about 96 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 27 to about 4 weight percent 1 ,2-dimethoxyethane; about 60 to about 92 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 40 to about 8 weight percent dimethoxymethane; about 61 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 39 to about 1 weight percent 1 , 1-dimethoxyethane; about 63 to about 92 weight percent 1,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 37 to about 8 weight percent tert-butyl methyl ether; and about 91 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 9 to about 1 weight percent methanol; about 87 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 13 to about 1 weight percent ethanol; about 85 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 15 to about 1 weight percent isopropanol; about 87 to about 99 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 13 to about 1 weight percent n-propanol; about 61 to about 92 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 39 to about 8 weight percent ethyl formate; about 63 to about 93 weight percent 1,1 ,1,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 37 to about 7 weight percent methyl acetate; and about 53 to about 90 weight percent 1 ,1 ,1 ,2,2,4,5,5,5- nonafluoro-4-(trifluoromethyl)-3-pentanone and about 47 to about 10 weight percent methyl formate.
4. An azeotropic composition selected from the group consisting of: 78.7 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 21.3 weight percent 1 ,1- dichloroethane having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 38.2 °C; 72 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 28 weight percent trans-1 ,2- dichloroethylene having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 31.8 °C; 70.2 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 29.8 weight percent N- (difluoromethyl)-N,N-dimethylamine having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 38.1 °C; 85.3 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 14.7 weight percent diisopropyl ether having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 40.3 °C; 92.6 weight percent 1,1, 1 ,2,2,4, 5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 7.4 weight percent 1 ,2- dimethoxyethane having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 42.0 °C; 79.5 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 20.5 weight percent dimethoxymethane having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 29.6 °C; 85.5 weight percent 1,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 14.5 weight percent 1 ,1- dimethoxyethane having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 44.4 °C; 83.3 weight percent 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 16.7 weight percent tert-butyl methyl ether having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 35.3 °C; and 97.0 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 3.0 weight percent methanol having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 43.5 °C; 96.8 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 3.2 weight percent ethanol having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 44.7 °C; 96.7 weight percent 1,1,1 ,2,2,4, 5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 3.3 weight percent isopropanol having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 45.6 °C; 98.4 weight percent 1,1,1 ,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 1.6 weight percent n-propanol having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 47.6 °C; 82.3 weight percent 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 17.7 weight percent ethyl formate having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 34.1 °C; 84.4 weight percent 1 ,1 ,1 ,2,2,4,5,5,5-nonafiuoro-4- (trifluoromethyl)-3-pentanone and 15.6 weight percent methyl acetate having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 35.4 °C; and 73.2 weight percent 1,1, 1,2,2,4, 5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and 26.8 weight percent methyl formate having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 22.6 °C.
5. A process for producing refrigeration, said process comprising evaporating the composition of claim 2, 3, or 4, in the vicinity of a body to be cooled, and thereafter condensing said composition.
6. A process for producing heat, said process comprising condensing the composition of claim 2, 3, or 4 in the vicinity of a body to be heated, and thereafter evaporating said composition.
7. A process for transferring heat, said process comprising transferring the composition of claim 2, 3 or 4 from the vicinity of a heat source to a heat sink.
8. The composition of claim 2, further comprising at least one ultraviolet fluorescent dye selected from the group consisting of naphthalimides, perylenes, coumarins, anthracenes, phenanthracenes, xanthenes, thioxanthenes, naphthoxanthenes, fluoresceins, derivatives of said dye and combinations thereof.
9. The composition of claim 3, or 4 further comprising at least one ultra-violet fluorescent dye selected from the group consisting of naphthalimides, perylenes, coumarins, anthracenes, phenanthracenes, xanthenes, thioxanthenes, naphthoxanthenes, fluoresceins, derivatives of said dye, and combinations thereof.
10. The composition of claim 8, further comprising at least one solubilizing agent selected from the group consisting of hydrocarbons, dimethylether, polyoxyalkylene glycol ethers, amides, ketones, nitriles, chlorocarbons, esters, lactones, aryl ethers, hydrofluoroethers, and 1 ,1 ,1-trifluoroalkanes; and wherein the refrigerant and solubilizing agent are not the same compound.
11. The composition of claim 10, wherein said solubilizing agent is selected from the group consisting of: a) polyoxyalkylene glycol ethers represented by the formula R1[(OR2)χOR3]y, wherein: x is an integer from 1 to 3; y is an integer from 1 to 4; R1 is selected from hydrogen and aliphatic hydrocarbon radicals having 1 to 6 carbon atoms and y bonding sites; R2 is selected from aliphatic hydrocarbylene radicals having from 2 to 4 carbon atoms; R3 is selected from hydrogen, and aliphatic and alicyclic hydrocarbon radicals having from 1 to 6 carbon atoms; at least one of R1 and R3 is selected from said hydrocarbon radicals; and wherein said polyoxyalkylene glycol ethers have a molecular weight of from about 100 to about 300 atomic mass units; b) amides represented by the formulae R1CONR2R3 and cyclo- [R4CON(R5)-], wherein R1, R2, R3 and R5are independently selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms, and at most one aromatic radical having from 6 to 12 carbon atoms; R4 is selected from aliphatic hydrocarbylene radicals having from 3 to 12 carbon atoms; and wherein said amides have a molecular weight of from about 100 to about 300 atomic mass units; c) ketones represented by the formula R1COR2, wherein R1 and R2 are independently selected from aliphatic, alicyclic and aryl hydrocarbon radicals having from 1 to 12 carbon atoms, and wherein said ketones have a molecular weight of from about 70 to about 300 atomic mass units; d) nitriles represented by the formula R1CN, wherein R1 is selected from aliphatic, alicyclic or aryl hydrocarbon radicals having from 5 to 12 carbon atoms, and wherein said nitriles have a molecular weight of from about 90 to about 200 atomic mass units; e) chlorocarbons represented by the formula RCIX, wherein; x is selected from the integers 1 or 2; R is selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms; and wherein said chlorocarbons have a molecular weight of from about 100 to about 200 atomic mass units; f) aryl ethers represented by the formula R1OR2, wherein: R1 is selected from aryl hydrocarbon radicals having from 6 to 12 carbon atoms; R2 is selected from aliphatic hydrocarbon radicals having from 1 to 4 carbon atoms; and wherein said aryl ethers have a molecular weight of from about 100 to about 150 atomic mass units; g) 1 ,1 ,1-trifluoroalkanes represented by the formula CF3R1, wherein R1 is selected from aliphatic and alicyclic hydrocarbon radicals having from about 5 to about 15 carbon atoms; i) fluoroethers represented by the formula R1OCF2CF2H, wherein R1 is selected from aliphatic and alicyclic hydrocarbon radicals having from about 5 to about 15 carbon atoms; or wherein said fluoroethers are derived from fluoro-olefins and polyols, wherein said fluoro-olefins are of the type CF2=CXY, wherein X is hydrogen, chlorine or fluorine, and Y is chlorine, fluorine, CF3 or ORf, wherein Rf is CF3, C2F5, or C3F7; and said polyols are of the type HOCH2CRR'(CH2)z(CHOH)xCH2(CH2OH)y, wherein R and R' are hydrogen, CH3 or C2H5, x is an integer from 0-4, y is an integer from 0-3 and z is either zero or 1 ; and j) lactones represented by structures [B], [C], and [D]:
[B] [C] [D] wherein, Ri through Rs are independently selected from hydrogen, linear, branched, cyclic, bicyclic, saturated and unsaturated hydrocarbyl radicals; and the molecular weight is from about 100 to about 300 atomic mass units; and k) esters represented by the general formula R1C02R2, wherein R1 and R2are independently selected from linear and cyclic, saturated and unsaturated, alkyl and aryl radicals; and wherein said esters have a molecular weight of from about 80 to about 550 atomic mass units.
12. A method for producing refrigeration or air conditioning, said method comprising: introducing the composition of claim 10 into a compression refrigeration or air conditioning apparatus by (i) dissolving the ultraviolet fluorescent dye in the refrigerant composition or heat transfer fluid in the presence of the solubilizing agent, and introducing the combination into said compression refrigeration or air conditioning apparatus or (ii), combining solubilizing agent and UV fluorescent dye and introducing said combination into said compression refrigeration or air conditioning apparatus containing refrigerant and/or heat transfer fluid.
13. A process for detecting a leak at or in the vicinity of a refrigeration or air conditioning apparatus, saild process comprising: providing a composition of claim 8 or 10 into said apparatus, and providing a suitable means for detecting said composition at a leak point or in the vicinity of said apparatus.
14. A method for producing refrigeration, said method comprising: evaporating the composition of claim 10 in the vicinity of a body to be cooled and thereafter condensing said composition.
15. A method for producing heat, said method comprising: condensing the composition or claim 10 in the vicinity of a body to be heated and thereafter evaporating said composition.
16. The composition of claim 2 or 10 further comprising a stabilizer, water scavenger, or odor masking agent.
17. The composition of claim 16 wherein said stabilizer is selected from the group consisting of nitromethane, hindered phenols, hydroxylamines, thiols, phosphites and lactones.
8. The composition of claim 16 wherein said water scavenger is an ortho ester.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002564148A CA2564148A1 (en) | 2004-05-26 | 2005-05-25 | 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof |
| JP2007515431A JP2008500435A (en) | 2004-05-26 | 2005-05-25 | 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl) -3-pentanone refrigerant composition and use thereof |
| EP05756328A EP1751248A2 (en) | 2004-05-26 | 2005-05-25 | 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof |
| BRPI0510843-8A BRPI0510843A (en) | 2004-05-26 | 2005-05-25 | composition, refrigerant or heat transfer fluid composition, azeotropic or quasi-azeotropic composition, processes for refrigeration production, heat production, heat transfer and leak detection and methods for refrigeration production or air conditioning, for refrigeration and heat production |
| MXPA06013550A MXPA06013550A (en) | 2004-05-26 | 2005-05-25 | 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof. |
| AU2005250437A AU2005250437A1 (en) | 2004-05-26 | 2005-05-25 | 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof |
| NO20066033A NO20066033L (en) | 2004-05-26 | 2006-12-27 | 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl) -3-pentanone cooling element compositions and uses thereof |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57503704P | 2004-05-26 | 2004-05-26 | |
| US60/575,037 | 2004-05-26 | ||
| US11/062,975 US7094356B2 (en) | 2004-05-26 | 2005-02-22 | 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof |
| US11/062,975 | 2005-02-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2005118754A2 true WO2005118754A2 (en) | 2005-12-15 |
| WO2005118754A3 WO2005118754A3 (en) | 2006-07-27 |
Family
ID=35463442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2005/018881 WO2005118754A2 (en) | 2004-05-26 | 2005-05-25 | 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1751248A2 (en) |
| JP (1) | JP2008500435A (en) |
| KR (1) | KR20070015209A (en) |
| AR (1) | AR055462A1 (en) |
| AU (1) | AU2005250437A1 (en) |
| BR (1) | BRPI0510843A (en) |
| CA (1) | CA2564148A1 (en) |
| MX (1) | MXPA06013550A (en) |
| NO (1) | NO20066033L (en) |
| WO (1) | WO2005118754A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008095881A1 (en) * | 2007-02-06 | 2008-08-14 | Solvay Fluor Gmbh | Nonflammable compositions comprising fluorinated compounds and use of these compositions |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102203102B1 (en) | 2014-03-05 | 2021-01-15 | 삼성디스플레이 주식회사 | Compound and organic light emitting device comprising same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5045226A (en) * | 1986-01-04 | 1991-09-03 | Bayer Aktiengesellschaft | Polyisocyanate preparations containing latent tin catalysts and a process for their preparation |
| WO2000024814A1 (en) * | 1998-10-26 | 2000-05-04 | 3M Innovative Properties Company | Process for preparation of polymeric foam using fluorinated ketones as blowing agents |
-
2005
- 2005-05-25 CA CA002564148A patent/CA2564148A1/en not_active Abandoned
- 2005-05-25 WO PCT/US2005/018881 patent/WO2005118754A2/en active Application Filing
- 2005-05-25 EP EP05756328A patent/EP1751248A2/en not_active Withdrawn
- 2005-05-25 JP JP2007515431A patent/JP2008500435A/en not_active Withdrawn
- 2005-05-25 KR KR1020067024695A patent/KR20070015209A/en not_active Withdrawn
- 2005-05-25 BR BRPI0510843-8A patent/BRPI0510843A/en not_active Application Discontinuation
- 2005-05-25 MX MXPA06013550A patent/MXPA06013550A/en unknown
- 2005-05-25 AU AU2005250437A patent/AU2005250437A1/en not_active Abandoned
- 2005-05-26 AR ARP050102167A patent/AR055462A1/en unknown
-
2006
- 2006-12-27 NO NO20066033A patent/NO20066033L/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5045226A (en) * | 1986-01-04 | 1991-09-03 | Bayer Aktiengesellschaft | Polyisocyanate preparations containing latent tin catalysts and a process for their preparation |
| WO2000024814A1 (en) * | 1998-10-26 | 2000-05-04 | 3M Innovative Properties Company | Process for preparation of polymeric foam using fluorinated ketones as blowing agents |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008095881A1 (en) * | 2007-02-06 | 2008-08-14 | Solvay Fluor Gmbh | Nonflammable compositions comprising fluorinated compounds and use of these compositions |
| US8318038B2 (en) | 2007-02-06 | 2012-11-27 | Solvay Fluor Gmbh | Nonflammable compositions comprising fluorinated compounds and use of these compositions |
| RU2469016C2 (en) * | 2007-02-06 | 2012-12-10 | Солвей Флуор Гмбх | Nonflammable compositions containing fluorinated compounds and use of said compositions |
| US8877087B2 (en) | 2007-02-06 | 2014-11-04 | Solvay Fluor Gmbh | Nonflammable compositions comprising fluorinated compounds and use of these compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070015209A (en) | 2007-02-01 |
| CA2564148A1 (en) | 2005-12-15 |
| AR055462A1 (en) | 2007-08-22 |
| BRPI0510843A (en) | 2007-11-27 |
| AU2005250437A1 (en) | 2005-12-15 |
| EP1751248A2 (en) | 2007-02-14 |
| WO2005118754A3 (en) | 2006-07-27 |
| JP2008500435A (en) | 2008-01-10 |
| NO20066033L (en) | 2007-02-19 |
| MXPA06013550A (en) | 2007-01-26 |
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