COMPOSITE MEMBRANES, PROCESSES FOR THEIR PREPARATION AND THEIR USE

摘要

Composite membranes, processes for their preparation and their use A b s t r a c t Composite membranes of a macroporous fillercontaining membrane of at least two incompatible polymers and a pore-free polyurethane membrane applied thereto exhibit an improved action in the removal of benzenes optionally substituted by lower alkyl radicals, hydroxyl, chlorine or bromine from their mixtures with aliphatic and/or cycloaliphatic hydrocarbons, alcohols, ethers, ketones and/or carboxylic acid esters or from effluent. Le A 26 927-US