Process for the separation or enrichment of gases
First Claim
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1. IN A PROCESS FOR THE SEPARATION OF A GAS SELECTED FROM THE CLASS CONSISTING OF HELIUM, HYDROGEN AND OXYGEN FROM A MIXTURE OF GASES CONTAINING AT LEAST ONE OF THE RECITED GASES, WHEREIN THE MIXTURE OF GASES IS BROUGHT INTO CONTACT WITH ONE SIDE OF A THIN, NON-POROUS POLYMERIC MEMBRANE, WHILE A REDUCED PARTIAL PRESSURE IN THE GAS TO BE SEPARATED IS MAINTAINED ON THE OPPOSITE SIDE OF SAID MEMBRANE AS COMPARED TO THE PARTIAL PRESSURE THEREOF ON SAID ONE SIDE, THE IMPROVEMENT COMPRISING THE USE OF A SOLID POLYARYLENE OXIDE FILM AS THE MEMBRANE, THE SOLID POLYARYLENE OXIDE FILM BEING COMPOSED OF RECURRING STRUCTURAL UNITS OF THE FORMULA
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1. IN A PROCESS FOR THE SEPARATION OF A GAS SELECTED FROM THE CLASS CONSISTING OF HELIUM, HYDROGEN AND OXYGEN FROM A MIXTURE OF GASES CONTAINING AT LEAST ONE OF THE RECITED GASES, WHEREIN THE MIXTURE OF GASES IS BROUGHT INTO CONTACT WITH ONE SIDE OF A THIN, NON-POROUS POLYMERIC MEMBRANE, WHILE A REDUCED PARTIAL PRESSURE IN THE GAS TO BE SEPARATED IS MAINTAINED ON THE OPPOSITE SIDE OF SAID MEMBRANE AS COMPARED TO THE PARTIAL PRESSURE THEREOF ON SAID ONE SIDE, THE IMPROVEMENT COMPRISING THE USE OF A SOLID POLYARYLENE OXIDE FILM AS THE MEMBRANE, THE SOLID POLYARYLENE OXIDE FILM BEING COMPOSED OF RECURRING STRUCTURAL UNITS OF THE FORMULA
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