Preparation of contract mass for alkylhalosilane production and

Details Preparation of contract mass for alkylhalosilane production and Preparation of contract mass for alkylhalosilane production and

1998-05-12

2000-07-18

Wilson, James O.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

423342, C07F 716

Patent

active

060909668

ABSTRACT:
Alkylhalosilanes are produced by first fluidizing a metallic silicon powder with an inert gas, preheating the silicon powder at a temperature between 200.degree. C. and a steady reaction temperature while keeping the silicon powder fluidized, adding a copper catalyst to the preheated silicon powder to form a contact mass, and feeding an alkyl halide into the contact mass whereby the alkylhalosilanes are formed by direct synthesis. This process prevents the copper catalyst from being sintered by thermal hysteresis and activates a high catalysis on the contact mass at the start of reaction. The desired dialkyldihalosilane can be produced at a high selectivity.

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patent: 4895969 (1990-01-01), Feldner et al.
patent: 5015751 (1991-05-01), Feldner et al.
patent: 5712405 (1998-01-01), Nakayama et al.
Astract--CA 1246533.

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