SEPARATION MEMBRANE FOR LIQUID MIXTURE

摘要

PURPOSE:To obtain a liquid separating membrane having high separation factor and high transmission coefficient in a pervaporation method and easy to receive solvent casting and having good film forming property, by employing a polymer having a main repeating unit represented by a specific formula as a main component. CONSTITUTION:A polymer having a main repeating unit represented by formula 1 such as poly [1-(decyldimethylsilyl)]-1-propyne is dissolved in a solvent such as cyclohexane and the resulting solution is cast on a glass plate and brought to a film state by evaporating the solvent to obtain a membrane. The membrane is released and used in the separation of a liquid mixture consisting of water soluble org. substance such as an aqueous ethanol solution and water according to a pervaporation method.