Semipermeable membranes prepared from polymers containing pendent sulfone groups

摘要

Semipermeable membranes useful for separating gaseous mixtures of carbon dioxide and methane into enriched fractions of each are prepared from at least one polymer containing a preponderance of arylene units, such as polyxylene oxide, the arylene units containing pendent sulfone groups substituted with an aromatic group, such as phenyl.