Preparation of polytetrahydrofuran

US5773648A · kind A · utility

Assignee

• BASF SE

Inventors

• Rainer Becker · Bad Dürkheim, DE
• Christoph Sigwart · Schriesheim, DE
• Michael Hesse · Westlake Village, US
• Rolf Fischer · Heidelberg, DE
• Karsten Eller · Stockach, DE
• Gerd Heilen · Speyer, DE
• Klaus-Dieter Plitzko · Schifferstadt, DE

Key dates

• Filing date: Mar 7, 1997
• Grant date: Jun 30, 1998
• Expiry date: Mar 7, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2693
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of polytetrahydrofuran or polytetrahydrofuran monoesters of C.sub.1 -C.sub.10 monocarboxylic acids by the polymerization of tetrahydrofuran over a heterogeneous catalyst in the presence of one of the telogens water, 1,4-butanediol or polytetrahydrofuran having a molecular weight of from 200 to 700 dalton or a C.sub.1 -C.sub.10 monocarboxylic acid or mixtures of these telogens, wherein a supported catalyst is used as catalyst, which contains a catalytically active amount of an oxygen-containing tungsten or molybdenum compound or mixtures of these compounds on an oxidic support material and which was calcined at temperatures ranging from 500.degree. to 1000.degree. C. following the application of the precursor compounds of said oxygen-containing molybdenum and/or tungsten compounds to the support material precursor.