Process for preparing acyloxysilanes and acyloxysiloxanes

Details Process for preparing acyloxysilanes and acyloxysiloxanes Process for preparing acyloxysilanes and acyloxysiloxanes

1978-12-28

1979-11-27

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 708

Patent

active

041761308

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.

REFERENCES:
patent: 3974198 (1976-08-01), Ashby
patent: 4028391 (1977-06-01), Foley
patent: 4066680 (1978-04-01), Lewis et al.
"Chemical Abstracts", 77, 153525q, 1972.

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