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AssigneeL' Air Liquide—Societe Anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsJoyce Katz Nelson, Benjamin Bikson, James Timothy Macheras
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A method for fabricating a composite membrane includes coating a substrate, such as, for example, an asymmetrical porous hollow fiber substrate, with a solution which includes a perfluorinated polymer and a perfluorinated solvent. Prior to coating, the substrate is impregnated with an impregnation fluid which is immiscible with the perfluorinated solvent. The method of the invention further includes removing the perfluorinated solvent and the impregnation fluid. A composite membrane includes a porous asymmetric hollow fiber substrate having an outer surface coated with a perfluoropolymer coating. Separation devices which include composite membranes and methods of separating a fluid mixture into a fraction enriched in a first component and a fraction depleted in that component also are described.
A method for separating a fluid mixture into a fraction enriched in a first component and a fraction depleted in the first component, comprising the step of contacting a fluid mixture selected from the group consisting of natural gas-containing mixture, a hydrogen gas-containing mixture and a hydrocarbon gas-containing mixture with a composite membrane, said composite membrane having been formed by a process including the steps of:
Dependencies are inferred from the claim text.