| 摘要 |
The invention relates to a gas separation membrane comprising a thin discriminating layer of bisphenol AF polycarbonate or polyestercarbonate. The invention further relates to a method of separating gases comprising (a) contacting a feed gas mixture under pressure with one side of a semi permeable membrane comprising a thin discriminating layer of polycarbonate or polyestercarbonate, wherein the diphenolic residue in the polymer backbone is based on bisphenol AF; (b) maintaining a pressure differential across the membrane under conditions such that a component of the feed gas selectively permeates through the membrane from the high pressure side to the low pressure side of the membrane; 35,021-F (c) removing the permeated gas which is enriched in the faster permeating component from the low pressure side of the membrane; and (d) removing the nonpermeated gas which is depleted in the faster permeating component from the high pressure side of the membrane. 35,021-F
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