Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1982-07-20
1984-09-11
Spitzer, Robert H.
Gas separation
Means within gas stream for conducting concentrate to collector
428391, 428447, B01D 5322
Patent
active
044708319
ABSTRACT:
A gas permselective membrane comprising a porous support having fine pores continuous in the thickness direction and a layer of a polymer laminated on the surface of said porous support, said polymer comprising a copolymer of (a) and (b), where (a) represents silarylene-siloxane structural units represented by the following general formula ##STR1## wherein R stands for an alkyl group having 1 to 10 carbon atoms, a phenyl group, a nucleus-substituted phenyl group having 6 to 20 carbon atoms, or a substituted alkyl group having 1 to 10 carbon atoms, Ar stands for ##STR2## and m is a number of from 5 to 8000, and wherein (b) represents diorganosiloxane structural units represented by the following general formula ##STR3## wherein R.sub.1 and R.sub.2 each independently stand for an alkyl group having 1 to 10 carbon atoms, a phenyl group, a nucleus-substituted phenyl group having 6 to 20 carbon atoms, a substituted alkyl group having 1 to 10 carbon atoms, a vinyl group, or an alkyl group, and n is a number of from 1 to 2000, with the proviso that n/m is in the range of 0<n/m.ltoreq.50,
wherein the average pore size of said porous membrane is 0.001 to 1 .mu.m and the thickness of said polymer layer is 0.01 to 1 .mu.m.
This permselective membrane has a high oxygen-separating capacity and is excellent in respect to pressure resistance and resistance to pinhole formation and, therefore, is valuable for obtaining from air oxygen-rich air-containing oxygen at a high concentration and at a low cost.
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Miller Austin R.
Spitzer Robert H.
Toray Industries Inc.
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