Method of gas separation and membranes therefor

Details Method of gas separation and membranes therefor Method of gas separation and membranes therefor

1989-07-27

1991-12-24

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, B01D 5322, B01D 7164

Patent

active

050748912

ABSTRACT:
An improved method of gas separation and novel polyimide membranes are disclosed and claimed. Membranes in accordance with the present invention include the condensation product of fluorinated diamines such as 2,2'-bis(3-aminophenyl)hexafluoropropane, 2,2'-bis(4-aminophenyl)hexafluoropropane and 2-(3-aminophenyl)-2'-(4-aminophenyl)hexafluoropropane with aromatic dianhydrides such as 3,3', 4,4' benzophenone tetracarboxylic acid dianhydride.

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