Copolyimide gas separation membranes derived from substituted ph

Details Copolyimide gas separation membranes derived from substituted ph Copolyimide gas separation membranes derived from substituted ph

1989-06-01

1990-06-12

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, B01D 5322

Patent

active

049329820

ABSTRACT:
An aromatic copolyimide gas separation membrane and the process of using it to separate one or more gases from a mixture of gases are disclosed. The aromatic copolyimide is the condensation product of a aromatic tetracarboxylic dianhydride with a phenylene diamine and a methylene dianiline both of which diamines are substituted with alkyl groups on all positions ortho to the amino groups.

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