Gas separating member and method for manufacture thereof

Details Gas separating member and method for manufacture thereof Gas separating member and method for manufacture thereof

1984-12-17

1986-06-10

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

427 40, 427 41, 428 36, 4283155, B01D 5322

Patent

active

045940797

ABSTRACT:
A gas separation member comprises a porous substrate, e.g., a membrane or a wall, and a polymer film deposited by plasma polymerization on the surface of the substrate and composed of at least two layers, i.e., a first layer contiguous with the substrate and a second layer superimposed on the first layer. The polymer film of the first layer possesses a uniform chemical composition or chemical structure in the direction of film thickness, while the polymer film of the second layer has a chemical composition or chemical structure which changes continuously or stepwise in the direction of film thickness. The gas separation member combines high gas separation factor and a high gas permeation rate, permitting separation of a specific gas in a concentrated form from a mixed gas. It also excels in weatherability.

REFERENCES:
patent: 3754375 (1973-08-01), Bouchilloux et al.
patent: 3980456 (1976-09-01), Browall
patent: 4132829 (1979-01-01), Hudis
patent: 4239793 (1980-12-01), Matsuura et al.
patent: 4393113 (1983-07-01), Sugie et al.
patent: 4410338 (1983-10-01), Yamamoto et al.
patent: 4444662 (1984-04-01), Conover
patent: 4465738 (1984-08-01), Chang
patent: 4479982 (1984-10-01), Nilsson et al.
patent: 4483901 (1984-11-01), Okita et al.

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