Highly selective asymmetric membranes for gas separation

Details Highly selective asymmetric membranes for gas separation Highly selective asymmetric membranes for gas separation

1994-09-26

1997-10-07

Nakarani, D. S.

Stock material or miscellaneous articles

Composite

Of polyimide

428447, 428451, B01D 5912, B32B 2708

Patent

active

056746296

ABSTRACT:
A highly selective asymmetric membrane for gas separation is provided which comprises rigid aromatic polyimide or copolyimide polymers comprising the monomers diphenyldi(trifluoromethyl)methane 3,4,3',4'-tetracarboxylic acid adianhydride and a monoaromatic metadiamine or a mixture of monoaromatic metadiamines.

REFERENCES:
patent: 4307135 (1981-12-01), Fox
patent: 4880441 (1989-11-01), Kesting et al.
patent: 5042993 (1991-08-01), Meier et al.
patent: 5178940 (1993-01-01), Matsumoto et al.

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