Semipermeable membrane made from polyether ketones

Details Semipermeable membrane made from polyether ketones Semipermeable membrane made from polyether ketones

1990-11-07

1992-01-21

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

21050021, 21050027, 21050028, 55 16, B01D 6100, B01D 3900

Patent

active

050825658

ABSTRACT:
A semipermeable membrane of polyether ketones is disclosed. It contains a polymer possesssing the following recurring units: ##STR1## where x denotes ##STR2## with R.sub.1, R.sub.2, R.sub.3 and R.sub.4 being identical to or different from one another and denoting H, alkyl, aryl, oxyaryl, NO.sub.2, CN, NR.sub.2 or halogen, and

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