Patent · US Expired

Process for preparing acyloxysilanes and acyloxysiloxanes

US4176130A · kind A · utility

8Cited by

3References

7Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Peter John · Burghausen, DE
Wolfgang Feichtner · Ach, AT
Werner Graf · Chur, CH
Volker Frey · Burghausen, DE

Key dates

Filing date	Dec 28, 1978
Grant date	Nov 27, 1979
Priority date	—
Expiry date	Dec 28, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F7/0876
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

This invention relates to an improved process for preparing acyloxysilanes and acyloxysiloxanes which comprises conducting an aliphatic carboxylic acid in vapor form upwards from the bottom of a column countercurrent to the flow of a chlorosilane in which the carboxylic acid is introduced into the column at such a rate that the carboxylic acid does not exceed about 1.3 mol per gram atom of Si-bonded chlorine in the column while removing the acyloxysilane from the bottom of the column. The acyloxysiloxanes are prepared by conducting an aliphatic carboxylic acid upwards from the bottom of a column in vapor form countercurrent to the flow of a chlorosilane while introducing up to about 10 percent by weight of water based on the weight of the carboxylic acid into the column and removing the acyloxysiloxane from the bottom of the column.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.