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US 8,680,312 B2Granted
Process for conversion of disilanes
AssigneeWacker Chemie AG
InventorsGudrun Tamme, Werner Geissler, Konrad Mautner
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Abstract
Highly alkyl-substituted disilanes generally considered as uncleavable, obtained as part of the residue of alkylchlorosilane synthesis, are converted into cleavable disilanes having fewer alkyl groups by reaction with hydrogen halide in the presence of an alumina catalyst. The resulting disilanes can be cleaved into commercially valuable monosilanes by conventional processes.
Claims9
A process for producing disilanes of the formula (1)
- RaSi2Cl6-a (1),
- comprising reacting a
- (a) mixture comprising disilanes of formula (2)
- RbSi2Cl6-b (2),
- where
- R is an alkyl radical of 1 to 6 carbon atoms,
- a is 1, 2 or 3,
- b is 4, 5, or 6
- b) with hydrogen chloride,
- wherein reacting takes place in the presence of an alumina catalyst which, per 100 parts by weight of alumina, contains from 1 to 10 parts by weight of aluminum chloride and from 0 to 10 parts by weight of a metal oxide selected from magnesium oxide, copper oxide, zinc oxide and mixtures thereof;
- and wherein the temperature of reaction is in the range from 180° C. to 280° C.
8 more elements
Dependencies are inferred from the claim text.