Polyimide gas separation membranes and process of using same

Details Polyimide gas separation membranes and process of using same Polyimide gas separation membranes and process of using same

1992-01-13

1993-01-12

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, B01D 5322, B01D 7164

Patent

active

051786508

ABSTRACT:
Novel aromatic polyimide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides are derived from a variety of aromatic tetracarboxylic dianhydrides used to form aromatic polyimide gas separation membranes and diamines of the formula ##STR1## where --X-- is a divalent radical such as --O-- or ##STR2## and --Ar'-- is a divalent radical such as phenylene, napthalene, biphenyl or ##STR3##

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