Process for converting organosilanes
AssigneeWacker Chemie AG
InventorsFrank Betschinger, Andreas Bockholt, Manfred Böck, Gerald Fleischmann, Klaus Käppler
Life of this patent
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Abstract
A method for converting organosilanes by reacting at least one silane (1) of the general formula RaSiCl4-a (I) with at least one further silane (2) of the general formula RbSiCl4-b (II) wherein silane (2) is identical or different from silane (1), optionally with additional use of silanes (3) which contain Si-bonded hydrogen and have the formula RdHeSiCl4-d-e (III) in the presence of aluminum salts, preferably aluminum halides, as catalysts and in the presence of cocatalysts, to obtain at least one silane (4) which differs from silanes (1) and (2) and has the general formula RcSiCl4-c (IV).
Claims13
A method for converting organosilanes by reacting at least one silane (1) of the general formula
- RaSiCl4-a (I)
- with at least one further silane (2) of the general formula
- RbSiCl4-b (II)
- wherein silane (2) is identical or different from silane (1),
- optionally with additional use of silanes (3) which contain Si-bonded hydrogen and have the formula
- RaHeSiCl4-d-e (III)
- in the presence of aluminum salts, as catalysts and in the presence of cocatalysts,
- to obtain at least one silane (4) which differs from silanes (1) and (2) and has the general formula
- RcSiCl4-c (IV),
- wherein R denotes in each case identical or different alkyl radicals having 1 to 4 carbon atoms or a phenyl radical,
- a is 2, 3 or 4,
- b is 0, 1, 2 or 3,
- c is 1, 2 or 3,
- d is 0, 1, 2 or 3 and
- e is 1, 2 or 3,
- with the proviso that the sum total of d+e is at most 4,
- characterized in that the cocatalysts used are those selected from the group of trifluoromethanesulfonic acid, trifluoromethanesulfonic esters, aluminum tris(trifluoromethanesulfonate), metal salts of yttrium and hafnium, metal salts of the lanthanides and actinides, and mixtures of these cocatalysts.
Dependencies are inferred from the claim text.