Process for the preparation of hydrogenosilanes
AssigneeRhone-Poulenc Industries
InventorsRaymond Calas, Jacques Dunogues, Gerard Deleris, Marcel Lefort, Christian Simonnet
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Abstract
A process for preparing hydrogenosilanes by hydrogenating disilanes, especially halogenated disilanes, under relatively mild reaction conditions is disclosed. The hydrogenation is effected in the presence of a catalytic system containing an aprotic compound and a nickel catalyst which consists essentially of finely divided nickel and is obtained by preliminary or in situ reduction of a nickel compound.
Claims10
A process for preparing hydrogenosilanes, which comprises the step of contacting at least one disilane of the formula (R).sub.3 Si--Si(R).sub.3, wherein the substituents R are the same or different from each other and represent an alkyl group containing 1 to 6 carbon atoms, an alkoxy group containing 1 to 6 carbon atoms, phenyl, halogen, hydrogen, 3,3,3-trifluoropropyl or trimethylsiloxy, with gaseous hydrogen under pressure in the presence of a catalytic system consisting essentially of:
- a. 0.2 to 10% by weight, relative to the weight of the disilane, of an aprotic base, and
- b. 0.05 to 5%, as the weight of elemental metal relative to the weight of the disilane, of a nickel catalyst which consists essentially of finely divided nickel, and is obtained by reduction of a nickel compound.
Dependencies are inferred from the claim text.