WO1997036821A1 - Silicium metallurgique a structure controlee destine a la synthese des halogenosilanes - Google Patents
Silicium metallurgique a structure controlee destine a la synthese des halogenosilanes Download PDFInfo
- Publication number
- WO1997036821A1 WO1997036821A1 PCT/FR1997/000514 FR9700514W WO9736821A1 WO 1997036821 A1 WO1997036821 A1 WO 1997036821A1 FR 9700514 W FR9700514 W FR 9700514W WO 9736821 A1 WO9736821 A1 WO 9736821A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silicon
- aluminum
- sihcium
- metallurgical
- synthesis
- Prior art date
Links
- 229910052710 silicon Inorganic materials 0.000 title abstract description 37
- 239000010703 silicon Substances 0.000 title abstract description 36
- 238000003786 synthesis reaction Methods 0.000 title abstract description 7
- 230000015572 biosynthetic process Effects 0.000 title abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 35
- 229910052782 aluminium Inorganic materials 0.000 abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 25
- 239000013078 crystal Substances 0.000 abstract description 11
- 230000009257 reactivity Effects 0.000 abstract description 11
- 239000011575 calcium Substances 0.000 abstract description 7
- 229910000765 intermetallic Inorganic materials 0.000 abstract description 7
- 229910052791 calcium Inorganic materials 0.000 abstract description 6
- 125000000217 alkyl group Chemical group 0.000 abstract description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004411 aluminium Substances 0.000 abstract description 3
- 125000003118 aryl group Chemical group 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 150000004756 silanes Chemical class 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- YGZSVWMBUCGDCV-UHFFFAOYSA-N chloro(methyl)silane Chemical class C[SiH2]Cl YGZSVWMBUCGDCV-UHFFFAOYSA-N 0.000 description 2
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229940050176 methyl chloride Drugs 0.000 description 2
- JLUFWMXJHAVVNN-UHFFFAOYSA-N methyltrichlorosilane Chemical compound C[Si](Cl)(Cl)Cl JLUFWMXJHAVVNN-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229920004482 WACKER® Polymers 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- KTQYJQFGNYHXMB-UHFFFAOYSA-N dichloro(methyl)silicon Chemical compound C[Si](Cl)Cl KTQYJQFGNYHXMB-UHFFFAOYSA-N 0.000 description 1
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000005055 methyl trichlorosilane Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 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
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
- C01B33/023—Preparation by reduction of silica or free silica-containing material
- C01B33/025—Preparation by reduction of silica or free silica-containing material with carbon or a solid carbonaceous material, i.e. carbo-thermal process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/12—Organo silicon halides
- C07F7/16—Preparation thereof from silicon and halogenated hydrocarbons direct synthesis
Definitions
- the invention relates to a particular quality of metallurgical silicon with a controlled structure and containing aluminum, intended more particularly for the synthesis of alkyl or aryl-halosilanes used in the manufacture of silicones.
- Metallurgical silicon denotes the silicon obtained industrially by carbothermic reduction of silica in an electric furnace. It contains at least 98% silicon and, as main elements, iron, aluminum and calcium. It also contains a certain amount of oxygen and other elements, at a content ⁇ 0.1%, such as P, Ti, V, Ni, etc.
- the desired product being D
- selectivity of the reaction It is also important to produce the maximum quantity of silanes per unit of time, the value of the weight flow of silanes produced being called reactivity.
- Much work has been devoted to improving the reactivity and selectivity of the reaction. We have highlighted, in particular, the role played by metallic compounds present in the structure of metallurgical silicon used as raw material. This is the case for the publication of the plaintiff: T. MARGARIA, JC ANGLEZIO and C.
- the Applicant has therefore sought a means of improving the reactivity and the selectivity of the reaction by acting on the silicon grains themselves. This can be done by controlling their phosphorus content as described in international application WO 95/01303 filed by BAYER and the applicant.
- the silicone industry continues to demand silicon capable of further increasing the selectivity and reactivity of the ROCHOW reaction.
- the subject of the invention is therefore a metallurgical silicon intended for the synthesis of alkyl and aryl halosilanes, the structure of which consists of crystals of primary silicon and of intermetallic compounds essentially based on silicon, iron, aluminum and calcium and characterized in that more than 90% of the primary silicon grains have an aluminum content of between 50 and 1000 ppm.
- This structure is preferably obtained with a silicon containing overall between 0.12 and 0.30% by weight of aluminum and with a process for solidifying the silicon after casting making it possible to descend below 1200 ° C. in less than 10 s .
- the Applicant has found that, for a certain range of aluminum contents and under specific conditions for solidification of liquid silicon, it is possible to increase the aluminum content of the primary silicon crystals beyond the normal saturation threshold. 15 ppm, and to control the level of supersaturation by varying both the aluminum content of the liquid sihcium and its solidification speed, so as to obtain an increase in the reactivity of the sihcium in the ROCHOW reaction.
- a sensitivity factor RSF is determined for aluminum such that the concentration C (in atoms per cm 3 ) is equal to the product RSF x IAJ / IS I , c is to say the product of the sensitivity factor by the ratio of the intensities measured for aluminum and the silicon matrix.
- This RSF factor is obtained by averaging at least 5 measurements made on pre-implanted standards of known concentration and it is of the order of 3.3 10 23 .
- the aluminum supersaturation level of the primary sihcium increases with the aluminum content of the starting hydrous sihcium and with the speed of solidification.
- the cooling rate in particular between 1400 and 1200 ° C., also plays on the percentage of primary silicon crystals having an aluminum content of more than 50 ppm, very high speeds leading to more than 95% of supersaturated crystals. , or even at percentages close to 100%.
- a scanning electron microscope and X-ray diffraction examination of the aluminum supersaturated sihcium crystals reveals the existence of deformations in the crystals such as dislocations or shear planes. With a constant intermetallic content and identical phosphorus content in the primary silicon, it is found that the reactivity of the aluminum supersaturated sihcium is higher compared to that of a sihcium whose crystals contain the normal content of about 15 ppm solid solution.
- each of the samples was subjected to a methylchlorosilane manufacturing test under the following conditions: The tests were carried out in a glass reactor, in stirred ht, with a diameter of 30 mm, equipped with an agitator. The same amount of sihcium with the same particle distribution between 70 and 160 ⁇ m, was used in each test.
- the reaction mixture consisted of 40 g of sihcium, 3.2 g of partially oxidized copper as catalyst and 0.05 g of ZnO.
- the methyl chloride was sent to the reaction mixture, through a sintered glass disc under a pressure of 0.2 MPa. After heating the reaction medium and starting the reaction, the temperature of the system was adjusted and maintained at 300 ° C. and the quantity and the composition of the mixture of silanes formed was determined.
- P denotes the total quantity of silanes produced in g / h; MeH, Mono, T, D, PS, the respective percentages by weight of monomethyldichlorosilane (CH 3 HSiCl 2 ), tomethylchlorosilane ((CH 3 ) 3SiCl), methyltrichlorosilane (CH 3 SiCl 3 ), dimethyldichlorosilane ((CH3) 2 SiCl 2 ) and polysilanes.
- the desired product is dimethyldichlorosilane
- the selectivity of the reaction is assessed by D, while the reactivity is measured by P.
- the values indicated are the means of 4 individual measurements.
- sample 1 where the primary silicon is supersaturated with aluminum, has an increased reactivity of 6% for a selectivity identical to 0.2%.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
Description
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97915546A EP0891297A1 (fr) | 1996-04-02 | 1997-03-24 | Silicium metallurgique a structure controlee destine a la synthese des halogenosilanes |
US09/155,343 US6391255B1 (en) | 1996-04-02 | 1997-03-24 | Metallurgical-grade silicon with a controlled structure for use in halosilane synthesis |
AU22983/97A AU2298397A (en) | 1996-04-02 | 1997-03-24 | Metallurgical-grade silicon with a controlled structure for use in halosilane synthesis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR96/04378 | 1996-04-02 | ||
FR9604378A FR2746785B1 (fr) | 1996-04-02 | 1996-04-02 | Silicium metallurgique a structure controlee destine a la synthese des halogenosilanes |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1997036821A1 true WO1997036821A1 (fr) | 1997-10-09 |
WO1997036821A9 WO1997036821A9 (fr) | 1997-11-13 |
Family
ID=9491012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1997/000514 WO1997036821A1 (fr) | 1996-04-02 | 1997-03-24 | Silicium metallurgique a structure controlee destine a la synthese des halogenosilanes |
Country Status (5)
Country | Link |
---|---|
US (1) | US6391255B1 (fr) |
EP (1) | EP0891297A1 (fr) |
AU (1) | AU2298397A (fr) |
FR (1) | FR2746785B1 (fr) |
WO (1) | WO1997036821A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2827592B1 (fr) * | 2001-07-23 | 2003-08-22 | Invensil | Silicium metallurgique de haute purete et procede d'elaboration |
US8962877B2 (en) * | 2009-10-16 | 2015-02-24 | Dow Corning Corporation | Method of making organohalosilanes |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4037021A1 (de) * | 1989-11-22 | 1991-05-23 | Elkem As | Siliciumerzeugnis zur verwendung zur herstellung von organosilanen und chlorsilanen und verfahren zu dessen herstellung |
DE4303766A1 (de) * | 1993-02-09 | 1994-08-11 | Wacker Chemie Gmbh | Verfahren zur Herstellung von Methylchlorsilanen |
EP0617039A1 (fr) * | 1993-03-24 | 1994-09-28 | Bayer Ag | Procédé de préparation d'organochlorosilanes |
WO1995001303A1 (fr) * | 1993-07-01 | 1995-01-12 | Pechiney Electrometallurgie | Silicium metallurgique contenant du phosphore pour la preparation d'organohalogenosilanes |
EP0673880A1 (fr) * | 1994-02-25 | 1995-09-27 | Pechiney Electrometallurgie | Silicium métallurgique à microstructure contrôlée pour la préparation des halogénosilanes |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2380995A (en) * | 1941-09-26 | 1945-08-07 | Gen Electric | Preparation of organosilicon halides |
DE3929865A1 (de) * | 1989-09-08 | 1991-03-14 | Bayer Ag | Verfahren zur herstellung von alkylhalogensilanen |
JP3205352B2 (ja) * | 1990-05-30 | 2001-09-04 | 川崎製鉄株式会社 | シリコン精製方法及び装置 |
-
1996
- 1996-04-02 FR FR9604378A patent/FR2746785B1/fr not_active Expired - Fee Related
-
1997
- 1997-03-24 AU AU22983/97A patent/AU2298397A/en not_active Abandoned
- 1997-03-24 US US09/155,343 patent/US6391255B1/en not_active Expired - Fee Related
- 1997-03-24 EP EP97915546A patent/EP0891297A1/fr not_active Ceased
- 1997-03-24 WO PCT/FR1997/000514 patent/WO1997036821A1/fr not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4037021A1 (de) * | 1989-11-22 | 1991-05-23 | Elkem As | Siliciumerzeugnis zur verwendung zur herstellung von organosilanen und chlorsilanen und verfahren zu dessen herstellung |
DE4303766A1 (de) * | 1993-02-09 | 1994-08-11 | Wacker Chemie Gmbh | Verfahren zur Herstellung von Methylchlorsilanen |
EP0610807A1 (fr) * | 1993-02-09 | 1994-08-17 | Wacker-Chemie GmbH | Procédé de préparation de méthylchlorosilanes |
EP0617039A1 (fr) * | 1993-03-24 | 1994-09-28 | Bayer Ag | Procédé de préparation d'organochlorosilanes |
WO1995001303A1 (fr) * | 1993-07-01 | 1995-01-12 | Pechiney Electrometallurgie | Silicium metallurgique contenant du phosphore pour la preparation d'organohalogenosilanes |
EP0673880A1 (fr) * | 1994-02-25 | 1995-09-27 | Pechiney Electrometallurgie | Silicium métallurgique à microstructure contrôlée pour la préparation des halogénosilanes |
Non-Patent Citations (1)
Title |
---|
T. MARGARIA ET AL.: "INFACON 6 Proceedings of the 6th International Ferroalloys Congress. Cape Town. Volume 1", 1992, SAIMM, JOHANNESBOURG, ZA, XP002020861 * |
Also Published As
Publication number | Publication date |
---|---|
US6391255B1 (en) | 2002-05-21 |
AU2298397A (en) | 1997-10-22 |
FR2746785A1 (fr) | 1997-10-03 |
EP0891297A1 (fr) | 1999-01-20 |
FR2746785B1 (fr) | 1998-05-22 |
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