Polyphenylene oxide-derived membranes for separation in organic

Details Polyphenylene oxide-derived membranes for separation in organic Polyphenylene oxide-derived membranes for separation in organic

1991-08-30

1992-09-29

Sever, Frank

Liquid purification or separation

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Material

264 451, B01D 7100

Patent

active

051511827

ABSTRACT:
Composite solvent stable membranes for treating organic liquids comprise a crosslinked layer of less than 5 microns in thickness supported on a solvent stable porous membrane substrate, which layer includes at least one polymer selected from polyphenylene oxide type polymers and polysulfone type polymers, provided that the crosslinked layer includes at least one polymer derived from haloalkylated polyphenylene oxide type monomers. Such composite membranes include solvent stable membranes which swell to an extent of no more than about 10% when immersed in various organic solvents, and their mixtures with each other and/or water.

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