Back to results
US 5,670,687 AGranted
Process for preparing SiH-containing organochlorosilanes
AssigneeWacker Chemie AG
InventorsGilbert Geisberger, Tassilo Lindner
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for preparing organosilanes which contain at least one Si-bonded hydrogen in the presence of a phosphonium catalyst, the phosphonium catalyst itself and also a process for its preparation.
Claims9
A process for preparing organosilanes which contain at least one Si-bonded hydrogen, which comprises carrying out a reaction according to the equation
- ZR.sub.a SiCl.sub.4-a +CH.sub.3 SiH.sub.c X.sub.3-c.fwdarw.ZR.sub.a SiH.sub.b Cl.sub.4-a-b +CH.sub.3 SiH.sub.c-y X.sub.3+y-c
- where
- R is identical or different and an alkyl, aryl, alkaryl or haloalkyl radical,
- X is a halogen atom,
- a and Z=1 or 2,
- b=the number of H.sub.c atoms exchanged for chlorine atoms,
- c=2 or 3, and
- y=the number of chlorine atoms exchanged for H.sub.c atoms
- in the presence of a catalyst of formula
- D.sup.+ --E.sub.n X.sup.-, (I)
- where D.sup.+ is a group of the formula R.sup.1.sub.m P.sup.+ R.sup.2.sub.4-m,
- where
- R.sup.1 is identical or different and is a monovalent hydrocarbon radical having from 1 to 20 carbon atoms per radical or two radicals R together form a divalent hydrocarbon radical having from 4 to 11 carbon atoms, which may be interrupted by a heteroatom,
- R.sup.2 is a monovalent or divalent hydrocarbon radical having from 1 to 20 carbon atoms and
- X is a halogen atom and
- m=1, 2 or 3,
- n=0 or 1, where m=3, when n=1, and
- E is a group of the formula --Si(OT).sub.p R.sup.3.sub.3-p,
- where
- T is a support bound to oxygen and
- R.sup.3 is a monovalent hydrocarbon radical having from 1 to 12 carbon atoms,
- p=1, 2 or 3.
19 more elements
A catalyst having the formula
- D.sup.+ --E.sub.n X.sup.-, (I),
- where
- D.sup.+ is a group of the formula R.sup.1.sub.m P.sup.+ R.sup.2.sub.4-m,
- where
- R.sup.1 is identical or different and is a monovalent hydrocarbon radical having from 1 to 20 carbon atoms per radical or two radicals R together form a divalent hydrocarbon radical having from 4 to 11 carbon atoms, which may be interrupted by a hetero atom,
- R.sup.2 is a monovalent or divalent hydrocarbon radical having from 1 to 20 carbon atoms and
- X is a halogen atom and
- m=1, 2 or 3,
- n=0 or 1, where m=3, when n=1, and
- E is a group of the formula --Si(OT).sub.p R.sup.3.sub.3-p,
- where
- T is a support bound to oxygen and
- R.sup.3 are identical or different and are each a monovalent hydrocarbon radical having from 1 to 12 carbon atoms and
- p is 1, 2 or 3.
11 more elements
Dependencies are inferred from the claim text.