Preparation of organohalosilanes
US6727376B2 · kind B2 · utility
1Cited by
9References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 29, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Oct 16, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In an industrial process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, a contact mass composed of the metallic silicon and the catalyst further contains an effective amount of a phosphonium compound having on the molecule at least one group of the formula: [R2R3R4P—]+Y− wherein R2, R3 and R4 each are a monovalent hydrocarbon group and Y is a halogen atom or acid group. The invention drastically increases the silane formation rate and the utilization of silicon without lowering the selectivity of useful silane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.