Membranes formed from rigid aromatic polyamides

Details Membranes formed from rigid aromatic polyamides Membranes formed from rigid aromatic polyamides

1990-03-30

1991-07-23

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, B01D 5322, B01D 7156

Patent

active

050340271

ABSTRACT:
The present invention is a class of polymeric membranes formed from aromatic polyamides derived from dicarboxylic acid chlorides and cardo diamines having alkyl substituents on all portions ortho to the amine functions. These polyamide membranes exhibit high gas permselectivities and are useful in various gas separation applications.

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Kim et al., "Reverse Permselectivity of N.sub.2 Over CH.sub.4 in Aromatic Polyimides", J. Appl. Poly. Sci., vol. 34, (1987).
M. Salome, "Prediction of Gas Barrier Properties of High Polymers", Poly. Eng. Sci., vol. 26, p. 1543, (1986).

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