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US 2003/0199705 A1Published application
Preparation of organohalosilanes
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsSusumu Ueno, Toshio Shinohara, Mikio Aramata, Yoichi Tanifuji, Tetsuya Inukai, Hajime Ishizaka
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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 phosphine chalcogenide compound. The invention drastically increases the silane formation rate and the utilization of silicon without lowering the selectivity of useful silane.
Claims4
A process for preparing organohalosilanes having the general formula (I):
- R1n(H)mSiX(4−n−m) (I)
- wherein R1 is a monovalent hydrocarbon group, X is a halogen atom, n is an integer of 1 to 3, m is an integer of 0 to 2, and the sum of n+m is an integer of 1 to 3, by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, wherein
- a contact mass composed of the metallic silicon and the catalyst further contains an effective amount of a phosphine chalcogenide compound having in a molecule at least one group of the general formula (II):
- 5
- wherein R2 and R3 are each independently a monovalent hydrocarbon group or halogen atom, and Y is a chalcogen atom.
2 more elements
Dependencies are inferred from the claim text.