METHOD FOR PREPARING A HALOSILANE USING COPPER SILICIDES AS CATALYSTS

摘要

A method for preparing a reaction product includes: optional step (1 ) contacting, at a temperature from 200 ¾ to 1400 °C, an ingredient including a silane of formula HaRbSiX(4- a-k), where subscript a is 0 to 4, subscript b is 0 or 1, a quantity (a + b) < 4, each R is independently a monovalent organic group, and each X is independently a halogen atom, with the proviso that when the quantity (a + b) < 4, then the ingredient further includes H2; with a copper silicide; thereby forming a reactant; and step (2) contacting the reactant with an organohalide at a temperature from 100 °C to 600 °C; thereby forming the reaction product and a spent reactant. The reaction product is distinct from the silane used in step (1 ), and the reaction product includes a halosilane of formula R2SiX2, where each R is independently a monovalent organic group, and each X is independently a halogen atom. Step (1 ) of the method may be optional. When step (1 ) is present, steps (1 ) and (2) are performed separately and consecutively.