Chlorosilane disproportionation process
AssigneeEthyl Corporation
InventorKishankumar K. Seth
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Abstract
Polyvinyl cyclic tertiary amine hydrocarbons having nitrogen in the ring as catalysts for chlorosilane disproportionation. The catalysts are suitable for continuous flow processes redistributing any one or more of SiHCl.sub.3, SiH.sub.2 Cl.sub.2, and SiH.sub.3 Cl.
Claims14
A process for the redistribution of one or more of trichlorosilane, dichlorosilane, and monochlorosilane, said process comprising the steps of:
- (a) passing such chlorosilane over a catalyst bed of polyvinyl cyclic, tertiary amine hydrocarbons having nitrogen in the ring, said hydrocarbons being selected from polyvinylpyrrolidone, polyvinylpyrrolidine, polyvinylpyridine, and substituted analogs thereof where the substituent groups do not interfere with catalyst activity and which are essentially homopolymers, for a period of time sufficient to produce a silane containing less chorine than is contained in the chlorosilane fed to the catalyst bed and a silane containing more chlorine than is contained in the chlorosilane fed to the catalyst bed;
- and
- (b) separately recovering the silanes produced by redistribution.
In a process for the preparation of dichlorosilane by treating trichlorosilane in the presence of a catalyst, the improvement wherein a polyvinyl cyclic tertiary amine hydrocarbon having nitrogen in the ring is used as the catalyst, said hydrocarbon being selected from polyvinylpyrrolidone, polyvinylpyrrolidine, polyvinylpyridine, and substituted analogs thereof where the substituent groups do not interfere with catalyst activity and which are essentially homopolymers.
Dependencies are inferred from the claim text.