| 摘要 |
In the preparation of cyclic and linear organosiloxanes by reacting an organohalogenosilane with a compound of the formula ROR' in which R is an alkyl radical with 1-4 C atoms, and R' is hydrogen or an alkyl radical with 1-4 C atoms, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION IN AN AQUEOUS SOLUTION OF A Lewis acid. Preferably the organohalogenosilane is a di- or tri-organo-chloro or -bromo-silane wherein the organo radical is selected from the group consisting of alkyl or alkenyl of up to 4 C atoms or aryl, especially dimethyldichlorosilane, and the Lewis acid is a 40-90% solution of ZnCl2, FeCl3, CdCl2 or H2SO4. Advantageously ROR' is methanol, ethanol, propanol, dimethyl ether or diethyl ether.
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