Hydrogen chloride escapes with a small amount of silanes via a condenser during the reaction of chlorosilanes with the rising alcohol vapor in countercurrent forming the heavier volatile alkoxysilanes. The alkoxysilanes produced as a sump product are continually run off. The stoichio- metric nature of this process means that the silicon- functional groups such as Si-H and organo-functional groups such as Si-CH2CH2CI or Si-CHZCHzCN survive intact.
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