Preparation of poloxy-alkylene glycols

US5416240A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans-Juergen Weyer · Mannheim, DE
• Rolf Fischer · Heidelberg, DE
• Gerhard Jeschek · Havelsee, DE
• Franz Merger · Bischofswerda, DE
• Herbert Mueller · Herznach, CH

Key dates

• Filing date: Mar 2, 1993
• Grant date: May 16, 1995
• Expiry date: Mar 2, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyoxyalkylene glycols are prepared by a process in which tetrahydrofuran is polymerized with a total of not more than 95 mol %, based on the amount of tetrahydrofuran used, of one or more comonomers from the group consisting of the cyclic ethers and acetals in the absence of water and in the presence of a monohydric alcohol or of a monocarboxylic acid with the aid of an anhydrous heteropoly acid catalyst, and the polyoxyalkylene glycol is liberated from the resulting polyoxyalkylene glycol monoethers or polyoxyalkylene glycol monoesters by cleavage of the monoether or monoester bond.