Membranes for selective gas separation
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United States of America Patent
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N/A
Issued Date -
Sep 25, 2003
app pub date -
Mar 7, 2003
filing date -
Sep 15, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention concerns a membrane for selective gas separation. The membrane consists of an ethylene oxide copolymer or a polymeric material obtained by crosslinking such a copolymer. Said copolymer is characterised in that it consists of at least 30% in number of --CH.sub.2CH.sub.2O-- units derived from ethylene oxide, and at least 2% in number of --CHR--CH.sub.2O-- units derived from an oxirane bearing a crosslinkable substituent R and/or of --CHR.sub.1--CH.sub.2O-- units derived from an oxirane bearing a non-crosslinkable substituent R.sub.1. The membranes are particularly useful for separating hydrophilic gases contained in a gas mixture.
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