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    • 7. 发明授权
    • Preparation of organosiloxanes
    • 有机硅氧烷的制备
    • US4060537A
    • 1977-11-29
    • US747262
    • 1976-12-03
    • Gunther MaassHans Joachim LuckingWerner BuchnerBruno Degen
    • Gunther MaassHans Joachim LuckingWerner BuchnerBruno Degen
    • C08G77/00C07F7/08C07F7/18C07F7/21C08G77/06
    • C07F7/21C07F7/0874
    • In the preparation of cyclic and linear organosiloxanes by reacting an organohalogenosilane with a compound of the formulaROR'in whichR is an alkyl radical with 1-4 C atoms, andR' 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 ZnCl.sub.2, FeCl.sub.3, CdCl.sub.2 or H.sub.2 SO.sub.4. Advantageously ROR' is methanol, ethanol, propanol, dimethyl ether or diethyl ether.
    • 在通过有机卤代硅烷与式ROR'的化合物(其中R是具有1-4个C原子的烷基,R'是氢或具有1-4个C原子的烷基)反应制备环状和线性有机硅氧烷的过程中, 其包含在路易斯酸的水溶液中影响反应的改进。 优选地,有机卤代硅烷是二 - 或三 - 有机氯或溴 - 硅烷,其中有机基团选自由高达4个C原子的烷基或烯基或芳基,特别是二甲基二氯硅烷组成的组,路易斯酸是 40-90%的ZnCl2,FeCl3,CdCl2或H2SO4溶液。 有利的是ROR是甲醇,乙醇,丙醇,二甲醚或乙醚。