Composite membrane and process for its production

US5733663A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Ude Scheunemann · Bad Soden am Taunus, DE
• Olaf Althoff · Niedernhausen, DE
• Werner Hickel · Ludwigshafen, DE
• Gunther Appel · Hattersheim, DE
• Jacqueline Bauer · Schwalbach am Taunus, DE
• Gerhard Geiss · Liederbach, DE

Key dates

• Filing date: Jul 25, 1997
• Grant date: Mar 31, 1998
• Expiry date: Jul 25, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

To produce a composite membrane, the solution of a polymer in a volatile organic solvent is spread on water, the solvent is allowed to evaporate, the polymer is crosslinked and the polymer film formed is transferred to a porous support membrane. The polymer is preferably a polysiloxane which is cross-linked via polymer-bonded OH groups. The composite membrane is suitable, inter alia, for pervaporation.