Desalination of polyaryl ethers by means of melt extraction

US10889689B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Simon Gramlich · Ludwigshafen am Rhein, DE
• Achim Stammer · Freinsheim, DE
• Angela Ulzhoefer · Ludwigshafen, DE
• Frank Niedermaier · Ladenburg, DE
• Michel GASSMANN · Ludwigshafen am Rhein, DE

Key dates

• Filing date: Mar 14, 2017
• Grant date: Jan 12, 2021
• Expiry date: Mar 14, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2381/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing a polyaryl ether by reacting components (a1) and (a2) in the presence of a carbonate compound (C) to obtain a salt-containing polymer (SP) comprising the polyaryl ether and a salt (S). After the reaction, the salt (S) is extracted from the salt-containing polymer (SP) to obtain a desalinated polymer (DP) comprising the polyaryl ether.