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US 5,177,234 AGranted
Preparation of alkoxysilanes by contacting a solution of hydrogen fluoride in an alcohol with silicon
AssigneeDow Corning Corporation
InventorsBinh T. Nguyen, John L. Speier
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Abstract
The present invention is a process for preparing alkoxysilanes by the contact of silicon with a solution of hydrogen fluoride in a liquid primary or secondary alcohol. The hydrogen fluoride activates the silicon causing the formation of alkoxysilanes to occur more rapidly and can provide selectivity for the production of dialkoxysilanes and trialkoxysilanes. The process may be run in the presence of copper or a copper compound as a catalyst. The process is advantageously run using atomized silicon.
Claims25
A process for preparing alkoxysilanes of formula
- (RO).sub.n SiH.sub.4-n
- where R is a primary or secondary alkyl radical and n=2, 3, or 4;
- the process consisting essentially of:
- contacting silicon with a solution of hydrogen fluoride in a liquid alcohol of formula
- ROH,
- where R is as previously described;
- at a temperature within a range of 50.degree. C. to 300.degree. C.
4 more elements
A process for preparing alkoxysilanes of formula
- (RO).sub.n SiH.sub.4-n
- where R is a primary or secondary alkyl radical and n=2, 3, or 4;
- the process consisting essentially of:
- contacting silicon with a solution of hydrogen fluoride in a liquid alcohol of formula
- ROH,
- where R is as previously described;
- in the presence of a catalyst selected from the group consisting of copper and copper compounds;
- at a temperature of 50.degree. C. to 300.degree. C.
5 more elements
Dependencies are inferred from the claim text.