Shin-etsu Chemical Co., Ltd.

Akio Muraida

Susumu Ueno

Toshio Shinohara

Mikio Aramata

Masaaki Furuya

Yoshihiro Shirota

Tetsuya Inukai

Hideaki Ozeki

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.

Co-catalyst and process for the preparation of organohalosilanes

In the synthesis of organohalosilanes by the direct process of reacting an organic halogen with metallic silicon powder, a metallic copper catalyst in the form of a thermally active metallic copper powder having large strain energy is used.

Metallic copper catalyst and process for making organohalosilanes

Organohalosilanes are prepared by reacting an organic halide with metallic silicon particles in the presence of a metallic copper catalyst which is a metallic copper powder in flake form having a bulk specific gravity of 1-3 g/cm and a mean particle size of 10 &mgr;m to 1 mm as measured by laser diffraction particle size distribution analysis.

Metallic copper catalyst and process for the synthesis of organohalosilanes

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Annaka, Japan

Akio Muraida