WO1998035910A1 - Catalyseurs metalliques a tamis moleculaire - Google Patents
Catalyseurs metalliques a tamis moleculaire Download PDFInfo
- Publication number
- WO1998035910A1 WO1998035910A1 PCT/EP1998/000765 EP9800765W WO9835910A1 WO 1998035910 A1 WO1998035910 A1 WO 1998035910A1 EP 9800765 W EP9800765 W EP 9800765W WO 9835910 A1 WO9835910 A1 WO 9835910A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solution
- molecular sieve
- titanium
- alkali metal
- precipitate
- Prior art date
Links
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 36
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 title claims abstract description 15
- 239000003054 catalyst Substances 0.000 title abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 50
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000010936 titanium Substances 0.000 claims abstract description 41
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 19
- -1 alkali metal cations Chemical class 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 51
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 32
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 26
- 229910001868 water Inorganic materials 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000007254 oxidation reaction Methods 0.000 claims description 21
- 230000015572 biosynthetic process Effects 0.000 claims description 20
- 239000002244 precipitate Substances 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 20
- 230000003647 oxidation Effects 0.000 claims description 17
- 238000003786 synthesis reaction Methods 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 14
- 150000001340 alkali metals Chemical class 0.000 claims description 8
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 239000002243 precursor Substances 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 125000002524 organometallic group Chemical group 0.000 claims 3
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 2
- 239000011707 mineral Substances 0.000 claims 2
- 101100352919 Caenorhabditis elegans ppm-2 gene Proteins 0.000 claims 1
- 230000001476 alcoholic effect Effects 0.000 claims 1
- 150000004820 halides Chemical class 0.000 claims 1
- 238000010899 nucleation Methods 0.000 claims 1
- 150000005622 tetraalkylammonium hydroxides Chemical group 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 17
- 230000003197 catalytic effect Effects 0.000 description 15
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 14
- 238000006555 catalytic reaction Methods 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000000499 gel Substances 0.000 description 12
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 12
- 239000010457 zeolite Substances 0.000 description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- 239000011343 solid material Substances 0.000 description 10
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 9
- 229910052681 coesite Inorganic materials 0.000 description 9
- 229910052906 cristobalite Inorganic materials 0.000 description 9
- 229910052682 stishovite Inorganic materials 0.000 description 9
- 229910052905 tridymite Inorganic materials 0.000 description 9
- 229910021536 Zeolite Inorganic materials 0.000 description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 8
- 239000007800 oxidant agent Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 150000002576 ketones Chemical class 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 150000001298 alcohols Chemical class 0.000 description 5
- 150000002432 hydroperoxides Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 150000007824 aliphatic compounds Chemical class 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000001027 hydrothermal synthesis Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000006735 epoxidation reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002638 heterogeneous catalyst Substances 0.000 description 2
- 238000010335 hydrothermal treatment Methods 0.000 description 2
- 239000012229 microporous material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- HKJYVRJHDIPMQB-UHFFFAOYSA-N propan-1-olate;titanium(4+) Chemical compound CCCO[Ti](OCCC)(OCCC)OCCC HKJYVRJHDIPMQB-UHFFFAOYSA-N 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- SPTHWAJJMLCAQF-UHFFFAOYSA-N 1,2-di(propan-2-yl)benzene;hydrogen peroxide Chemical compound OO.CC(C)C1=CC=CC=C1C(C)C SPTHWAJJMLCAQF-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- KDSGPAZGWJOGTA-UHFFFAOYSA-M dibenzyl(dimethyl)azanium;hydroxide Chemical compound [OH-].C=1C=CC=CC=1C[N+](C)(C)CC1=CC=CC=C1 KDSGPAZGWJOGTA-UHFFFAOYSA-M 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- XGZNHFPFJRZBBT-UHFFFAOYSA-N ethanol;titanium Chemical group [Ti].CCO.CCO.CCO.CCO XGZNHFPFJRZBBT-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000005216 hydrothermal crystallization Methods 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- CIBMHJPPKCXONB-UHFFFAOYSA-N propane-2,2-diol Chemical compound CC(C)(O)O CIBMHJPPKCXONB-UHFFFAOYSA-N 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium(IV) ethoxide Substances [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B37/00—Compounds having molecular sieve properties but not having base-exchange properties
- C01B37/005—Silicates, i.e. so-called metallosilicalites or metallozeosilites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/89—Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
Definitions
- the present invention relates to metal containing molecular sieve catalysts in particular titanium molecular sieve catalysts and in particular to a method of manufacture of such catalysts
- Titanium containing molecular sieve catalysts are well known examples of such catalysts are the titanium containing silicalite catalysts based on a crystalline synthetic material comprising silicon and titanium oxides and which are characterised by an infra red absorption band at around 950 cm " ' ' to 960 cm - 1 and typically are of the general formula xTiO2(1 -x)SiO2
- ⁇ is from 0 0001 to 0 10 preferably 0 1 to 4
- These catalysts known as TS-1 ana TS-2 are typically prepared in the absence of aluminium from a mixture containing a source of silicon oxide a source of titanium oxide a nitrogenated organic base and water
- Various specific processes for the preparation of titanium silica te catalysts are described in for example Belgian Patent 886812 EP 0190609 A US 3329481 US4410501 US 4666692 US4701428 EP 031 1983 EP 0376453 M G Cle ⁇ ci et al Journal of Catalysis 129. 159-167 (1991 ), M A Ugina et al Applied Catalysis A General.
- Typical synthesis mixtures yielding Ti-Beta zeolite after hydrothermal treatment have an initial molar composition within the following ranges
- the Ti plus Si Al molar ratio is within the range of from 10 to 200 1
- Hydrogen peroxide is advantageously present in the synthesis mixture although it may decompose before or during hydrothermal treatment, preferably in a proportion of 10 to 200 moles H2O2 per mole of TEOT when that is used as the source of titanium
- a further example of a titanium containing zeolite is Ti MCM-41
- Various methods for the manufactute of this catalyst are described in for example in A Corma et al , J Chem Soc Chem Commun, page 1635, (1995), A Corma, et al J Chem Soc Chem Commun , page 147 (1994), and T Blasco et al , J Catalysis 156, 65-74, (1995)
- the present invention provides a method for the synthesis of a metal isomorphous substituted molecular sieve which method comprises
- the level of alkali metal within the organic structure directing agent is at least 50 ppm
- the metal may be any metal which may be incorporated in the framework of a molecular sieve and includes for example titanium and chromium
- the process of the present invention is applicable to any synthesis of a metal containing molecular sieve which is normally sensitive to the presence of alkali metal in the template during syntheses of the molecular sieve
- the metal is titanium and the metal oxide is si ca/titania
- the use of an intermediate silica titania co-precipitate or co-gel in the synthesis of zeolite isomorphous substituted molecular sieves enables the use of impure templating agents
- templating agents which contain relatively high levels of alkali metal species such as Na+ and K+ cations
- the levels of sodium are 20 ppm or less and the levels of
- titanium isomorphous substituted molecular sieves may be prepared by this method Which molecular sieve is produced will depend on the templating agent used and the presence of other precursors for the particular zeolite desired It is envisaged that the process will be particularly suitable for the production of titanium isomorphous substituted si calite molecular sieves such as beta and MCM-41 molecular sieves
- co-precipitate or co-gel may be made by any of the known processes in the art
- suitable co-precipitates and co-gels may be made according to EP 031 1 983 which describes the synthesis of a co-precipitate, WO95/03249 WO95/03250 and sol-gel methods as disclosed in M A Ugina, et al Applied Catalysis A General 124 391 -408 P Serrano, et al Microporous Materials 4 273-282 and M A Camblor et al Applied Catalysis A General 133 L185- L189 ( 1995)
- the desired titanium isomorphous substituted molecular sieve may be derived from the co-precipitate or the co-gel using organic templating agents containing high levels of alkali metal cations via either the hydrothermal crystallization of a liquid gel produced by the complete dissolution of either a co-precipitate or a co- gel, by the formation of a liquid gel with incomplete dissolution of the co-gel or co- precipitate or by incipient wetness impregnation of the co-precipitate or co-gel as described in M A Camblor et al Applied Catalysis A General, 133 L185-L189 (1995) and US5474754
- TS-1 may be made by the following process
- the silica titania co-precipitate may be formed by mixing any suitable silica source together with a source of titanium to form a co-solution which may then be subject to the appropriate conditions for co- precipitation
- the silica source such as for example tetra ethyl ortho silicate (TEOS) is hydrolysed in an acid environment preferably a nitric acid environment followed by addition of a solution of a titanate such as for example tetrapropyl ortho titanate (TPOTi) in a suitable solvent such as for example isopropanoi
- TPOTi tetrapropyl ortho titanate
- the titanate is not hydroiysed before mixing with the silica source
- the silica titania may be co-precipitated by removal of water and the solvent used to prepare the co-solution
- heating to a temperature in the range of room temperature to 200°C is particularly suitable preferably it is in the range 80 to 120°C
- the silica titania co-precipitate may then be used for the production of titanium isomorpnous substituted molecular sieves such as s ⁇ l ⁇ cal ⁇ te-1 by dissolution in an appropriate templating agent e g tetra propyl ammonium hydroxide (TPAOH)
- TPAOH tetra propyl ammonium hydroxide
- the resultant solution may then optionally be seeded with colloidal molecular sieve such as colloidal silicalite which may be prepared according to the procedure described in for example WO93/08125 the disclosure of which is incorporated by reference
- the titanium containing molecular sieve e g s ⁇ l ⁇ cal ⁇ te-1 may be obtained by crystallisation whilst stirring at an appropriate temperature and over an appropriate period of time
- 1 to 30 days preferably 1 to 10 days and most preferably is at least 3 days at 50 to 200 C preferably 130 to 180"C to be particularly suitable for the formation of isomorphous titanium s ⁇ l ⁇ ca t
- the crystallised product obtained may be removed from the crystallisation medium by filtration and the washed
- Temporalat'ng agent may be used in the formation of the co-precipitate or co-gel In this aspect the templating agent will need to be substantially free of alkali metal cations
- Typical templating agents include for example TEAOH TPAOH TMAOH and dibenzyldimethyl ammonium hydroxide
- the titanium containing catalysts of the present invention are useful catalysts particularly for hydrocarbon oxidation
- the direct oxidation of saturates to introduce functional groups such as keto ⁇ es and alcohols using a heterogeneous catalyst system would be extremely attractive especially if there is high conversions and selectivity for either alcohol or ketone or even if conversion is low there is relatively high selectivity for one of the products
- titanium isomorphous substituted molecular sieve catalysts of the present invention and in particular titanium s ⁇ l ⁇ cal ⁇ te-1 have been found to be an active oxidation catalyst especially for reactions involving hydrogen peroxide as oxidant
- the new catalysts may also be effective with organic hydroperoxide oxidants
- the solution contains from 10-100 preferably 10 to 70 wt % hydrogen peroxide for example diluted hydrogen peroxide (30 to 40% by weight in water) It is also preferred that a polar solvent be present when aqueous hydrogen peroxide is used to increase the solubility of the organic compound in the H202 aqueous phase
- suitable solvents include acetone and methanol
- the oxidising agent may be an organic hydroperoxide
- suitable organic hydroperoxides include di-isopropyl benzene monohydroperoxide, cumene hydroperoxide tert butyl hydroperoxide cyclohexylhydroperoxide ethylbenzene hydroperoxide tert amyl hydroperoxide tetra ne hydroperoxide and the compound containing the saturated organic group is liquid or in the dense phase at the conditions used for the reaction
- the oxidant is a an organic hydroperoxide then tertiary butyl hydroperoxide is particularly beneficial since the tertiary butyl alcohol produced can readily be converted to the valuable isobutylene molecule
- the preferred oxidising agent is hydrogen peroxide
- the saturated groups which may be oxidised by the process of this invention include long or short branched or linear alkanes containing 3 or more, preferably 3 to 30 more preferably 3 to 12 carbon atoms cyclic alkanes and mono- and poly- alkyl aromatics in which at least one of the alkyl groups contain at least two preferably at least three more preferably 3 to 18 most preferably 3 to 12 carbon atoms and mono- and poly-alkyl cyclic alkanes
- the process of the invention is equally applicable to the epoxidation of olefins dienes, the production of ether glycols diols the oxidation of alcohols or ketones, aldehydes to acids and the hydroxylation of aromatics
- saturated groups may be oxidised with high selectivity to alcohols and ketones under relatively mild conditions
- the reactivity sequence for the aliphatic compounds slows down from tertiary to secondary and to primary compounds
- the process uses mild temperature and pressure conditions and the conversion and yield are high and by-product formation is small
- the oxidant conversion is high
- the optimum reaction temperature is between 50 and 150°C preferably about 100°C when using hydrogen peroxide
- the oxidation reaction may be in the liquid or dense phase or in the gaseous phase preferably the reactions are in the liquid phase
- the reaction can be carried out at room temperature but higher reaction rates may be involved at higher temperatures, for example under reflux conditions
- Increase of the pressure either due to the autogeneous pressure created by the heated reactants or by use of a pressurised reactor still higher temperatures can be reached
- Use of higher pressures in the range of 1 to 100 bars (105 to 107Pa) can increase the conversion and selectivity of the reaction
- the oxidation reaction can be carried out under batch conditions or in a fixed bed and the use of the heterogeneous catalyst enables a continuous reaction in system
- the catalyst is stable under the reaction conditions and can be totally recovered and reused
- the oxidation process of the present invention is preferably carried out in the presence of a solvent Choice of solvent is important since it should dissolve the organic phase and the aqueous phase when hydrogen peroxide is used which is generally present due to the use of aqueous hydrogen peroxide as the oxidising agent where organic hydroperoxides are used suitable organic solvents should be used
- Polar compounds are preferred which are inert under reaction conditions and examples of preferred solvents are alcohols, ketones and ethers, with a number of carbon atoms which is not too high, preferably less than or equal to 6 Methanol or tertiary butanol is the most preferred of the alcohols, acetone and butanone are the most preferred of the ketones
- the amount of solvent may influence the reaction product and the conversion, the choice of solvent and the amount
- the catalyst was characterized by XRD UV-Vis, IR ICP and its catalytic performance in n-heptane oxidation with 30% H2O2
- the catalytic test results are summarized in Table 1
- TEOS Tetra Ethyl ortho Silicate
- TPAOH Tetra Propylammonium Hydroxide
- the catalytic test shows the following results (Table 1 )
- TS-1 was synthesized using a freshly prepared silica -titania coprecipitate
- the silica-titania coprecipitate was made by hydrolizing TEOS and TEOT in a 0 05M HNO3 solution
- the resulting clear solution was heated at 100°C under stirring until a white solid material formed This material was then dried overnight at 120°C to remove the remaining water and alcohol
- the coprecipetate was found to be amorphous by X-ray powder diffraction Typical procedure is as follows 300g TEOS ( 1 44 mol) was added slowly to 1460 g 0 05M HNO3 (7 26 g HNO3 65%) 16.22g TEOT(0 048 mol) was disolved in 162g isopropanol and was added dropwise to the silicen solution (addition time 5h) Si Ti ratio 30 1
- the catalytic test shows the following results (table 1 )
- the catalyst were tested in n-heptane oxidation with aqueous H2O2 30 %
- the reaction conditions are 20 4 g n-heptane (0 204 mol) 44 4 g H2O2 30 % (0 39 mole), 1 g catalyst 71 1 g acetone 100° C, under magnetic stirring
- the results are summarized in the following table
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Abstract
La présente invention concerne des catalyseurs métalliques et plus particulièrement des catalyseurs à tamis moléculaire substitué, isomorphe et contenant du titane, et leur procédé de fabrication. Ledit procédé de fabrication présente une caractéristique importante en ce qu'on peut utiliser des agents matriciels relativement impurs par rapport à des cations de métaux alcalins.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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GB9703093.6 | 1997-02-14 | ||
GBGB9703093.6A GB9703093D0 (en) | 1997-02-14 | 1997-02-14 | Metal molecular sieve catalysts |
Publications (1)
Publication Number | Publication Date |
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WO1998035910A1 true WO1998035910A1 (fr) | 1998-08-20 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/EP1998/000765 WO1998035910A1 (fr) | 1997-02-14 | 1998-02-11 | Catalyseurs metalliques a tamis moleculaire |
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GB (1) | GB9703093D0 (fr) |
WO (1) | WO1998035910A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2784672A1 (fr) * | 1998-10-19 | 2000-04-21 | Rhodia Chimie Sa | Procede de preparation d'une silicalite de titane de type mel, produit obtenu et ses applications en catalyse |
FR2784671A1 (fr) * | 1998-10-19 | 2000-04-21 | Rhodia Chimie Sa | Procede de preparation d'une titanozeosilite de type mfi, produit obtenu et ses applications en catalyse |
WO2003042101A3 (fr) * | 2001-11-15 | 2003-09-12 | Pq Holding Inc | Tamis moleculaires ts-pq au titano-silicate ; procedes de synthese et utilisation |
CN110054199A (zh) * | 2019-06-11 | 2019-07-26 | 兰州理工大学 | 一种绿色节能合成Fe-ZSM-5分子筛的方法 |
CN115286008A (zh) * | 2022-07-21 | 2022-11-04 | 武汉理工大学 | 一种表面只含骨架内六配位Ti的Ti-MCM-41分子筛及其制备方法、深度脱硫应用 |
Citations (4)
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EP0292363A2 (fr) * | 1987-05-22 | 1988-11-23 | Rhone-Poulenc Chimie | Zéolites de structures MFI à base de silice et d'oxyde de titane et procédé de synthèse de celles-ci |
EP0311983A2 (fr) * | 1987-10-12 | 1989-04-19 | Enichem Anic S.r.l. | Procédé de préparation de silicalite de titane |
EP0543247A1 (fr) * | 1991-11-21 | 1993-05-26 | BASF Aktiengesellschaft | Procédé de préparation de cristaux de silicate de titane à structure zéolite essentiellement exempts de métaux alcalins |
EP0659685A1 (fr) * | 1993-12-23 | 1995-06-28 | ARCO Chemical Technology, L.P. | Procédé d'époxydation et catalyseur à cet effet |
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1997
- 1997-02-14 GB GBGB9703093.6A patent/GB9703093D0/en active Pending
-
1998
- 1998-02-11 WO PCT/EP1998/000765 patent/WO1998035910A1/fr active Application Filing
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EP0292363A2 (fr) * | 1987-05-22 | 1988-11-23 | Rhone-Poulenc Chimie | Zéolites de structures MFI à base de silice et d'oxyde de titane et procédé de synthèse de celles-ci |
EP0311983A2 (fr) * | 1987-10-12 | 1989-04-19 | Enichem Anic S.r.l. | Procédé de préparation de silicalite de titane |
EP0543247A1 (fr) * | 1991-11-21 | 1993-05-26 | BASF Aktiengesellschaft | Procédé de préparation de cristaux de silicate de titane à structure zéolite essentiellement exempts de métaux alcalins |
EP0659685A1 (fr) * | 1993-12-23 | 1995-06-28 | ARCO Chemical Technology, L.P. | Procédé d'époxydation et catalyseur à cet effet |
Non-Patent Citations (4)
Title |
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CAMBLOR M A ET AL: "A NEW HIGHLY EFFICIENT METHOD FOR THE SYNTHESIS OF TI-BETA ZEOLITE OXIDATION CATALYST", APPLIED CATALYSIS A: GENERAL, vol. 133, no. 2, 1995, pages L185 - L189, XP002032291 * |
MIGUEL A. CAMBLOR: "Large pore Ti-Beta zeolite with very low aluminium content: an active and selective catalyst for oxidations using hydrogen peroxide", INDUSTRIAL CHEMISTRY LIBRARY, vol. 8, 1996, pages 391 - 404, XP002067432 * |
SERRANO D. P. ET AL.: "Evidence of solid-solid transformations during the TS-1 crystallzation from amorphous wetness impregnated SiO2-TiO2 xerogels", MICROPOROUS MATERIALS, vol. 7, no. 6, December 1996 (1996-12-01), pages 309 - 321, XP002067617 * |
ZHANG G ET AL: "PREPARATION OF COLLOIDAL SUSPENSIONS OF DISCRETE TS-1 CRYSTALS", CHEMISTRY OF MATERIALS, vol. 9, no. 1, January 1997 (1997-01-01), pages 210 - 217, XP000683976 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2784672A1 (fr) * | 1998-10-19 | 2000-04-21 | Rhodia Chimie Sa | Procede de preparation d'une silicalite de titane de type mel, produit obtenu et ses applications en catalyse |
FR2784671A1 (fr) * | 1998-10-19 | 2000-04-21 | Rhodia Chimie Sa | Procede de preparation d'une titanozeosilite de type mfi, produit obtenu et ses applications en catalyse |
WO2000023185A1 (fr) * | 1998-10-19 | 2000-04-27 | Rhodia Chimie | Procede de preparation d'une titanozeosilite de type mfi, produit obtenu et ses applications en catalyse |
WO2000023377A1 (fr) * | 1998-10-19 | 2000-04-27 | Rhodia Chimie | Procede de preparation d'une silicalite de titane de type mel, produit obtenu et ses applications en catalyse |
WO2003042101A3 (fr) * | 2001-11-15 | 2003-09-12 | Pq Holding Inc | Tamis moleculaires ts-pq au titano-silicate ; procedes de synthese et utilisation |
CN110054199A (zh) * | 2019-06-11 | 2019-07-26 | 兰州理工大学 | 一种绿色节能合成Fe-ZSM-5分子筛的方法 |
CN115286008A (zh) * | 2022-07-21 | 2022-11-04 | 武汉理工大学 | 一种表面只含骨架内六配位Ti的Ti-MCM-41分子筛及其制备方法、深度脱硫应用 |
Also Published As
Publication number | Publication date |
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GB9703093D0 (en) | 1997-04-02 |
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