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US 4,731,461 AGranted
Process for preparing tin alkoxides
AssigneeStauffer Chemical Company
InventorCarl C. Greco
Life of this patent
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Abstract
Tin tetra-alkoxides absent halogenic impurities are prepared by a two-step process comprising a first step reaction of tin tetrahalide with an alcohol and ammonia. A second step reacts the product of the first step with a metal amide and additional alcohol. An alternative second step reacts the product of the first step with a metal alkoxide.
Claims15
A process for the preparation of tin tetraalkoxides which comprises the following steps:
- (a) combining in a liquid reaction medium a tin tetrahalide reactant, a first step alcohol reactant, and an ammonia reactant, to yield a halogen containing tin alkoxide product represented on the average by the formula:
- (R.sub.1 O).sub.4-m Sn
- wherein R.sub.1 is an alkyl or alkoxyalkyl group, X is a halogen, and m is a number from about 0.1 to about 1.0,
- (b) reacting the tin alkoxide reaction product of Step (a) with a metal amide reactant and a second-step alcohol reactant to yield a substantially halogen-free tin tetra-alkoxide reaction product represented by the formula:
- (R.sub.1 O).sub.4 Sn
- wherein R.sub.1 is as defined in Step (a).
3 more elements
A process for the preparation of tin alkoxides which comprises the following steps:
- (a) combining in a liquid reaction medium a tin tetrahalide reactant, a first step alcohol reactant, and an ammonia reactant, to yield a halogen containing tin alkoxide product represented on the average by the formula:
- (R.sub.1 O).sub.4-m SnX.sub.m
- wherein R.sub.1 is an alkyl or alkoxyalkyl group, X is a halogen, and m is a number from about 0.1 to about 1.0,
- (b) reacting the tin alkoxide reaction product of Step (a) with a metal alkoxide reactant to yield a halogen-free tin tetra-alkoxide reaction product represented by the formula:
- (R.sub.1 O).sub.4 Sn
- wherein R.sub.1 is as defined in Step (a).
3 more elements
Dependencies are inferred from the claim text.