Cross-linked cellulose hydrate membranes

US5739316A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Hans Beer · Salzhemmendorf, DE
• Wolfgang Demmer · Göttingen, DE
• Hans-Heinrich Horl · Bovenden, DE
• Dieter Melzner · Göttingen, DE
• Dietmar Nussbaumer · Göttingen, DE
• Hans-Weddo Schmidt · Hardegsen, DE
• Eberhard Wunn · Höchberg, DE

Key dates

• Filing date: May 16, 1996
• Grant date: Apr 14, 1998
• Expiry date: May 16, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08B15/005
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for cross-linking a cellulose hydrate membrane by use of a water-soluble diepoxide in an alkaline solution. The membrane so produced is highly resistant to attack by alkalis, acids and cellulases, and is readily regenerable by alkaline cleaning.