Semipermeable membrane made from a homogeneously miscible polyme

Details Semipermeable membrane made from a homogeneously miscible polyme Semipermeable membrane made from a homogeneously miscible polyme

1991-07-22

1992-10-06

Spitzer, Robert

Liquid purification or separation

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Material

210490, 21050042, B01D 7128, B01D 7156

Patent

active

051528940

ABSTRACT:
A semipermeable membrane is described which comprises a homogeneously miscible polymer blend of an aromatic polyamide and polyvinylpyrrolidone. The aromatic polyamide is in particular formed of recurrent units of the formula I: ##STR1## wherein E.sup.1 and E.sup.2 are identical or different and are selected from the groupings ##STR2## --AR.sup.1 --, and --AR.sup.1 --X--AR.sup.2,
where AR.sup.1 and Ar.sup.2 are the same or different 1,2-phenylene, 1,3-phenylene or 1,4-phenylene groups which may be substituted by (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy, --CF.sub.3 or halogen and X denotes

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W. Pusch et al., "Synthetic Membranes: State of the Art", Desalination, 35 (1980) pp. 5-20.
Robert E. Kesting, "Synthetic Polymeric Membranes", 2nd Ed., 1985, pp. 237-286.

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