Process for making membranes

US10906012B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Oliver Gronwald · Frankfurt, DE
• Martin Weber · Maikammer, DE
• Frank Rittig · Worms, DE
• Martin HEIJNEN · Landsberg am Lech, DE
• Henning Urch · Ludwigshafen, DE

Key dates

• Filing date: Sep 7, 2016
• Grant date: Feb 2, 2021
• Expiry date: Apr 4, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A20/131
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for making membranes M comprising the following steps: a) providing a dope solution D comprising at least one polymer P and at least one solvent S, b) adding at least one coagulant C to said dope solution D to coagulate said at least one polymer P from said dope solution D to obtain a membrane M, wherein said at least one solvent S comprises more than 50% by weight of at least one compound according to formula (I) (I), wherein R1 and R2 are independently C1 to C20 alkyl, R3 is selected from H or an aliphatic rest, 20 R4 is selected from H or an aliphatic rest, AO represents at least one alkylene oxide, n is a number from 0 to 100.