Co-catalyst and process for the preparation of organohalosilanes
US6984748B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Apr 10, 2002 |
| Grant date | Jan 10, 2006 |
| Priority date | — |
| Expiry date | Apr 10, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a Rochow process, organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst and a co-catalyst. The invention uses as the co-catalyst a powder of co-catalyst active element-copper alloy containing substantial strain energy because this co-catalyst can reduce the activation time taken until a steady state is reached, which has been an outstanding problem in Rochow reaction, maintain the steady state over time and increase the selectivity of desired diorganodihalosilane for eventually increasing the yield based on the starting silicon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.