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Conversion of direct process high-boiling residue to monosilanes

United States Patent

6,013,235
January 11, 2000
View the Complete Patent at the US Patent & Trademark Office
A process for the production of monosilanes from the high-boiling residue resulting from the reaction of hydrogen chloride with silicon metalloid in a process typically referred to as the "direct process." The process comprises contacting a high-boiling residue resulting from the reaction of hydrogen chloride and silicon metalloid, with hydrogen gas in the presence of a catalytic amount of aluminum trichloride effective in promoting conversion of the high-boiling residue to monosilanes. The present process results in conversion of the high-boiling residue to monosilanes. At least a portion of the aluminum trichloride catalyst required for conduct of the process may be formed in situ during conduct of the direct process and isolation of the high-boiling residue.
Brinson; Jonathan Ashley (Vale of Glamorgan, GB), Crum; Bruce Robert (Madison, IN), Jarvis, Jr.; Robert Frank (Midland, MI)
Dow Corning Corporation (Midland, MI)
09/ 356,659
July 19, 1999
This invention was made with United States Government support under DOE Contract DE-FC04-94AL99566 awarded by the Department of Energy. The United States Government has certain rights in the invention.