Nitrated polyimide gas separation membranes

Gas separation: apparatus – Apparatus for selective diffusion of gases – Plural layers

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96 14, 21050039, B01D 7164, B01D 6912

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active

057164304

ABSTRACT:
Useful gas separation membranes made from aromatic polyimides which comprise pendant nitro groups incorporated onto the phenyl backbone of the polymer. These polymers may be synthesized by the aryl nitration of the unsubstituted polyimides, or from the condensation reaction of aromatic diamines containing pendant nitro groups with aromatic dianhydrides, and are particularly useful in air separation.

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