Method of making organohalosilanes

Patent metadata

Field	Value
Publication number	US-8962877-B2
Application number	US-201013499707-A
Country	US
Kind code	B2
Filing date	Jul 28, 2010
Priority date	Oct 16, 2009
Publication date	Feb 24, 2015
Grant date	Feb 24, 2015

Abstract

The invention pertains to a process for the preparation of organohalosilanes. The process comprises contacting a first finely-divided silicon comprising from 0.08 to 0.25% (w/w) of aluminum with an organohalide in a reactor at a temperature of from 250 to 350° C. in the presence of a Direct Process catalyst comprising copper, and a promotor; and introducing a second finely-divided silicon into the reactor comprising from 0.001 to <0.10% (w/w) of aluminum into the reactor as needed in an amount sufficient to maintain an aluminum concentration of from 0.08 to 0.2% (w/w), based on a weight of unreacted silicon and aluminum.

First claim

We claim:

1. A method of preparing organohalosilanes, the method comprising:
(i) contacting a first finely-divided silicon comprising from 0.08 to 0.25% (w/w) of aluminum with an organohalide in a reactor at a temperature of from 250 to 350° C. in the presence of a Direct Process catalyst comprising copper, and a promotor; and
(ii) introducing a second finely-divided silicon comprising from 0.001 to<0.10% (w/w) of aluminum into the reactor as needed in an amount sufficient to ma…

Assignees

• Kohane Joseph Peter
• Pillai Unnikrishnan R
• Wineland Jonathan David
• Dow Corning

Inventors

• Kohane Joseph Peter
• Pillai Unnikrishnan R
• Wineland Jonathan David

Classifications

• C07F7/16 Primary

  Chemistry & Metallurgy · mapped topic