Removal of the catalyst from polyphenylene ethers

US4460764A · kind A · utility

Assignee

• BASF SE

Inventors

• Rudi W. Reffert · Beindersheim, DE
• Juergen Hambrecht · Heidelberg, DE
• Adolf Echte · Ludwigshafen, DE
• Hans H. Schuster · Erpolzheim, DE
• Hermann Dreher · Seeheim-Jugenheim, DE

Key dates

• Filing date: Jul 21, 1983
• Grant date: Jul 17, 1984
• Expiry date: Jul 21, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/46
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In the preparation of a high molecular weight polyphenylene ether from a monohydric phenol by an oxidative coupling reaction with oxygen in the presence of a catalyst complex obtained from a metal salt and an organic amine and in the presence of a solvent, and isolation of the metal ion component of the catalyst from the polyphenylene ether solution by means of a complex-forming or chelate-forming compound, the catalyst is removed by a method wherein complex formation and isolation of the metal ion component of the catalyst are carried out in an aqueous medium in the presence of from 0.1 to 5,000 mg of an anionic or non-ionic surfactant.