TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The molecular sieves are SAPO-34, Si-DDR, UZM-9, A1PO-14, A1PO-53, A1PO-34, A1PO-17, SSZ-62, SSZ-13, A1PO-18, UZM-5, UZM-25, ERS-12, CDS-1, MCM-65, ZSM-52, MCM-47, 4A, A1PO-34, SAPO-44, SAPO-47, SAPO-17, CVX-7, SAPO-35, SAPO-56, A1PO-52, SAPO-43, silicalite-1, NaX, NaY, or CaY.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The fluoropolymer is 2,2-bistrifluoro-methyl-4,5-difluoro-1,3-dioxole (PDD); an amorphous copolymer of 2,2-bistrifluoro-methyl-4,5-difluoro-1,3-dioxole (PDD) and another fluorine-containing monomer consisting of tetrafluoroethylene (TFE), perfluoro(alkyl vinyl ether)s, hexafluoropropylene, vinylidene fluoride, or chlorotrifluoroethylene; an amorphous copolymer of 2,2-bistrifluoro-methyl-4,5-difIuoro-1,3-dioxole (PDD) and tetrafluoroethylene (TFE); a copolymer of 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole (TTD) and tetrafluoroethylene (TFE); or a fluoro-silane fluorinated copolymer with silane functional groups and a fluoro-epoxide fluorinated oligomer with epoxide functional groups. The porous asymmetric membrane layer comprises cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose propionate, cellulose butyrate, cellulose cyanoethylate, cellulose methacrylates, polysulfone, sulfonated polysulfone, polyethersulfone, sulfonated polyethersulfone, polyimide, polyetherimide, polyamide, polyurethane, polycarbonate, polystyrene, polybenzoxazole, polyamide/imide, polyketone, polyether ketone, polyether ether ketone, and/or polymer of intrinsic microporosity. The polymer of the porous asymmetric membrane layer is polysulfones, sulfonated polysulfones, polyethersulfones, sulfonated polyethersulfones, polyethers, polyetherimides, cellulosic polymers consisting of cellulose acetate or cellulose triacetate, polyamides, polyimides, poly(3,3', 4,4'-benzophenone tetracarboxylic dianhydride-pyromellitic dianhydride-3,3',5,5'-tetramethyl-4,4'-methylene dianiline) (poly(BTDA-PMDA-TMMDA)), poly(3,3',4,4'-diphenylsulfone tetracarboxylic dianhydride-3,3',5,5'-tetramethyl-4,4'-methylene dianiline) (poly(DSDA-TMMDA)), poly(3,3',4,4'-benzophenone tetracarboxylic dianhydride-3,3',5,5'-tetramethyl-4,4'-methylene dianiline) (poly(BTDA-TMMDA)), poly(3,3',4,4'-diphenylsulfone tetracarboxylic dianhydride-pyromellitic dianhydride-3,3',5,5'-tetramethyl-4,4'-methylene dianiline) (poly(DSDA-PMDA-TMMDA)), poly(2,2'-bis-(3,4-dicarboxyphenyl)hexafluoropropane dianhydride-1,3-phenylenediamine) (poly(6FDA-m-PDA)), poly(2,2'-bis-(3,4-dicarboxyphenyl)hexafluoropropane dianhydride-1,3-phenylenediamine-3,5-diaminobenzoic acid) (poly(6FDA-m-PDA-DABA)), poly(3,3',4-benzophenone tetracarboxylic dianhydride-pyromellitic dianhydride-4,4'-oxydiphthalic anhydride-3,3',5,5'-tetramethyl-4,4'-methylene dianiline) (poly(BTDA-PMDA-ODPATMMDA)), polyamide/imides, polyketones, polyether ketones, or polymers of intrinsic microporosity.