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US 4,079,071 AGranted
Synthesis of hydrosilanes from methylchloropolysilanes
AssigneeUnion Carbide Corporation
InventorRobert Schwenn Neale
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Abstract
The present invention relates to a process for preparing high yields of hydrosilanes by reacting methylchloropolysilanes with hydrogen gas under pressure at a temperature of from about 25.degree. C to about 350.degree. C in the presence of a copper catalyst. Useful copper catalysts include copper metal, copper salts, and complexes of copper salts with organic ligands.
Claims8
A process for preparing silanes of the formula H.sub.a Me.sub.x SiCl.sub.4-(a+x), comprising
- A. contacting
- (1) a polysilane consisting of units of the formula:
- Me.sub.x Cl.sub.y Si (I),
- with
- (2) hydrogen gas under pressure, and
- B. heating the above admixture to a temperature of from about 25.degree. C to about 350.degree. C, in the presence of a catalytic amount of a copper catalyst,
- wherein a is 1 to 2, x is 0 to 3, and y is 0 to 3, the sum of a and x being from 1 to 4, the sum of x and y being from 1 to 3;
- all the silicon atoms in (I) being bonded to at least one other silicon atom and all the valences of the silicon atoms in (I) being satisfied by other silicon atoms, Cl or Me radicals, with the proviso that the polysilane contain at least one Cl group.
5 more elements
Dependencies are inferred from the claim text.