Chlorosilane disproportionation catalyst and method for producing a silane compound by means of the catalyst
AssigneeDenki Kagaku Kogyo Kabushiki Kaisha
InventorsMitsunori Yamada, Masaji Ishii, Akira Miyai, Yukihiko Nakajima, Shinsei Sato
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Abstract
A chlorosilane disproportionation catalyst comprising a tertiary amine of the formula: ##STR1## where each R represents an aliphatic hydrocarbon group and the sum of carbon atoms in the three aliphatic hydrocarbon groups as R is 12 or more, and a tertiary amine hydrochloride of the formula: ##STR2## where R is as defined above.
Claims8
A method for disproportionating at least one chlorosilane selected from the group consisting of monochlorosilane, dichlorosilane and trichlorosilane, comprising:
- conducting said disproportionation in the presence of a chlorosilane disproportionation catalyst comprising (1) a tertiary amine of the formula:
- ##STR5## wherein each R group represents an aliphatic hydrocarbon group and the sum of carbon atoms in the three aliphatic hydrocarbon groups is at least 12, and (2) a teritary amine hydrochloride of the formula:
- ##STR6## wherein R is as defined above.
A method for continuously producing monosilane and/or dichlorosilane by the disproportionation of trichlorosilane or dichlorosilane, which comprises:
- (a) supplying the chlorosilane starting material and a chlorosilane disproportionation catalyst comprising a tertiary amine of the formula:
- ##STR7## wherein R represents an aliphatic hydrocarbon group and the sum of carbon atoms in the three aliphatic hydrocarbon groups is at least 12, and a tertiary amine hydrochloride of the formula:
- ##STR8## wherein R is as defined above, into a reaction tower having a distilling function;
- (b) obtaining from the top of the tower, a silane compound containing more hydrogen atoms than the chlorosilane starting material;
- (c) withdrawing, from the bottom of the tower, a liquid mixture comprising the catalyst and silane compounds containing more chlorine atoms as byproducts;
- (d) separating the silane compounds and the catalyst in the liquid mixture;
- and
- (e) recylcing the separated catalyst to the reaction tower.
Dependencies are inferred from the claim text.