| 摘要 |
PURPOSE:To increase permeation velocity and to improve separation factor in the stage for separating a mixture of water with org. liquid by pervaporation method, by using a membrane comprising polysilarylene siloxane. CONSTITUTION:Polysilarylene siloxane membrane consisting of silicone polymer comprising principal chain consisting of -[Si(CH3)2-R-Si(CH3)2]- as recurrent unit is used. R in the formula is 2-8C hydrocarbon group. The membrane is prepd. easily by casting soln. of the polymer in org. solvent such as toluene added with a crosslinking agent, on a plate made of polypropylene, etc. The liquid mixture which is separated with the membrane is one contg. at least one org. liquid as the component of the mixture and conventional pervaporation device is usable for the separation.
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