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AssigneeUop LLC
InventorsChunqing Liu, Zara Osman, Changqing Lu, Andrew J. Poss, Rajiv R. Singh
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The present invention generally relates to gas separation membranes and, in particular, to high selectivity fluorinated ethylene-propylene polymer-comprising polymeric blend membranes for gas separations. The polymeric blend membrane comprises a fluorinated ethylene-propylene polymer and a second polymer different from the fluorinated ethylene-propylene polymer. The fluorinated ethylene-propylene polymers in the current invention are copolymers comprising 10 to 99 mol % 2,3,3,3-tetrafluoropropene-based structural units and 1 to 90 mol % vinylidene fluoride-based structural units. The second polymer different from the fluorinated ethylene-propylene polymer is selected from a low cost, easily processable glassy polymer.
A process of separating at least two gases or two liquids comprising contacting said gases or liquids with a polymeric blend membrane comprising a fluorinated ethylene-propylene copolymer comprising 10 to 99 mol % 2,3,3,3-tetrafluoropropene-based structural units and 1 to 90 mol % vinylidene fluoride-based structural units and a second polymer different from said fluorinated ethylene-propylene copolymer.
Dependencies are inferred from the claim text.