Preparation of alkylhalosilanes

摘要

Alkylhalosilanes are prepared by using a fluidized bed reactor having an inlet and an outlet, charging the reactor with a contact mass of metallic silicon powder and copper catalyst, feeding alkyl halide into the reactor whereby the silanes are produced by direct synthesis, and discharging the product gas from the outlet. The reactor is provided at the outlet with a ceramic filter. As the product gas passes through the filter, contact mass particles entrained therein are collected on the filter. During the progress of reaction, a backwash gas is blown to the filter, thereby feeding the contact mass deposit back to the reactor.