Preparation of alkylhalosilanes
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTetsuo Nakanishi, Tetsuya Inukai, Kazumasa Tsukioka, Hiroshi Nakayama, Yukinori Satoh
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Abstract
An alkylhalosilane is prepared by charging a reactor with a contact mass comprising metallic silicon powder and a copper catalyst and feeding a reactant gas containing an alkyl halide into the reactor whereby the silane is formed by direct synthesis. A phosphorus compound is added to the contact mass in an amount of 3,000-10,000 ppm calculated as phosphorus. The invention produces a more amount of dialkyldihalosilane in a desirable STY while minimizing the amount of unnecessary disilanes.
Claims12
A process for preparing an alkylhalosilane of the general formula:
- R.sub.n SiX.sub.4-n
- wherein R is an alkyl group having 1 to 4 carbon atoms, X is a halogen atom, and letter n is an integer of 0 to 4, comprising the steps of
- charging a reactor with a contact mass comprising metallic silicon powder and a copper catalyst, said contact mass containing a phosphorus compound in an amount of 3,000 to 10,000 ppm calculated as phosphorus, and
- feeding a reactant gas containing an alkyl halide into the reactor whereby the silane is formed by direct synthesis.
Dependencies are inferred from the claim text.