Semipermeable membrane made from polyether ketones

US5082565A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Haubs · Bad Kreuznach, DE
• Hansotto Drotloff · Frankfurt am Main, DE
• Juergen Wildhardt · Haigerloch, DE

Key dates

• Filing date: Nov 7, 1990
• Grant date: Jan 21, 1992
• Expiry date: Nov 7, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D69/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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 PA0 Z being one of the groupings --O--, --S--, --CH.sub.2 --, --CF.sub.2 --, ##STR3## --SO.sub.2 -- or --CO--