Sulfonated polyimide gas separation membranes

Details Sulfonated polyimide gas separation membranes Sulfonated polyimide gas separation membranes

1996-06-06

1998-03-10

Spitzer, Robert

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

95 51, 95 53, 95 54, 96 13, 96 14, B01D 5322, B01D 7164, B01D 7168

Patent

active

057256330

ABSTRACT:
Novel polyimide gas separation membranes and the process of using such membranes to separate gases are disclosed. The polyimides are formed from rigid aromatic dianhydrides and aromatic diamines that contain sulfonic acid, salified sulfonic acid, or sulfonic ester groups. Methods of preparing improved composite gas separation membranes from the sulfonated polyimides of this invention are disclosed.

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