Separation of gases through gas enrichment membrane composites
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United States of America Patent
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Jul 19, 1988
Issued Date -
N/A
app pub date -
Jul 27, 1987
filing date -
May 26, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Thin film composite membranes having as a permselective layer a film of a homopolymer of certain vinyl alkyl ethers are useful in the separation of various gases. Such homopolymers have a molecular weight of greater than 30,000 and the alkyl group of the vinyl alkyl monomer has from 4 to 20 carbon atoms with branching within the alkyl moiety at least at the carbon atom bonded to the ether oxygen or at the next adjacent carbon atom. These membranes show excellent hydrolytic stability, especially in the presence of acidic or basic gaseous components.
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