TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The fluid mixture contains at least one alcohol dissolved in water and where the permeating fraction is enriched with alcohol. The alcohol is methanol, ethanol (preferred), isopropyl alcohol or butanol. The fluid mixture contains dissolved or suspended water as the first component where the fraction depleted in the first component is a dry fluid and the fraction enriched in the first component contains water vapor. The fluid mixture is a gas or a vapor. The first component is water vapor, carbon dioxide, hydrogen or oxygen gas. The vapor is a mixture of alcohol and water vapor and the first component is enriched in water vapor. The first component is water vapor or oxygen. The fluid mixture is a solution of one or more components and the first component is a solute dissolved in the solution.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: (I) is an asymmetric membrane with porous perfluorohydrocarbon layer having pore size below 20 nm. The perfluorohydrocarbon is a mixture of functional perfluorohydrocarbon with a nonfunctional perfluoropolymer. The nonfunctional perfluoropolymer is a copolymer of 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole and tetrafluoroethylene, 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxide based polymer and/or a poly(perfluorobutenyl vinyl ether)polymer. The perfluoropolymer forms a dense layer on the surface of the porous poly(aryl ether ketone)substrate. The perfluoropolymer contains epoxy groups. The solvent contains water. The blend of poly(aryl ether ketone) with polyimide further contains a polymeric porogen or an additive. (I) is porous. (I) has at least one layer having an average pore size of below 100 nm. The perfluorohydrocarbon layer is formed only on an exterior surface of the porous poly(aryl ether ketone) membrane. The fluid separation membrane is a composite membrane having a dense perfluorohydrocarbon layer. The dense perfluorohydrocarbon layer is formed from a copolymer of 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole and tetrafluoroethylene, 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxide based polymer and/or a poly(perfluorobutenyl vinyl ether) polymer. Preferred Process: The blend is shaped by extrusion, casting or molding. The primary amine is present in a solvent. The partial pressure differential is generated through the application of vacuum or a sweep gas.