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Asymmetric separation membrane and pervaporation separation method that uses the separation membrane
Asymmetric separation membrane and pervaporation separation method that uses the separation membrane
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机译：非对称分离膜及使用该分离膜的全蒸发分离方法
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摘要
PURPOSE:To obtain an asymmetric separation membrane made of aromatic polyimide consisting of an aromatic tetracarboxylic acid component composed of biphenyl tetracarboxylic acids as a main component and an aromatic diamine component containing di(aminophenoxy)-biphenyls. CONSTITUTION:In an asymmetric separation membrane for the pervaporization of an org. compound mixed liquid, soluble aromatic polyimide is prepared from an aromatic tetracarboxylic acid component containing 70mol.% or more of biphenyl tetracarboxylic acids and an aromatic diamine component consisting of 15mol.% or more of di(aminophenoxy)-biphenyls and the remainder of an aromatic diamine compound having 2-3 benzene rings and the asymmetric separation membrane is obtained from said aromatic polyimide. When the pervaporization of an org. compound mixed liquid is performed using said separation membrane, a part of an org. compound can efficiently and selectively permeate.
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