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US 2026/0070933 A1Published application
Gas phase dehydrogenative silylation process using a heterogeneous rhenium catalyst
AssigneesDow Global Technologies LLC, Dow Silicones Corporation
InventorsRonen Weingarten, Juan Venegas, Krishna Janmanchi, Aayush Singh, Dimitris Katsoulis, David Laitar
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Abstract
A process for preparing a vinyl-functional chlorosilane is performed by dehydrogenative silylation of a hydridochlorosilane and ethylene, both in the gas phase, in the presence of the heterogeneous rhenium catalyst. The process can be used to prepare vinyldimethylchlorosilane at ambient pressure.
Claims20
A process for making a reaction product comprising a vinyl-functional chlorosilane, wherein the process comprises:
- 1) contacting in a reactor, under conditions to effect dehydrogenative silylation reaction, starting materials comprising
- (A) a hydridochlorosilane of formula R(3-x)HSiClx, where each R is an independently selected alkyl group having from 1 to 18 carbon atoms, and subscript x is 1 to 3;
- and
- (B) ethylene;
- where (A) the hydridochlorosilane and (B) the ethylene are each in a gaseous phase;
- and
- where the dehydrogenative silylation reaction is performed in the presence of (C) a heterogeneous metal catalyst comprising Rhenium and a support;
- thereby preparing a reactor effluent comprising the vinyl-functional chlorosilane.
5 more elements
Dependencies are inferred from the claim text.