Method for producing polytetrahydrofuran with low color index

US6197979A · kind A · utility

Assignee

• BASF SE

Inventors

• Rainer Becker · Bad Dürkheim, DE
• Karsten Eller · Stockach, DE
• Heinz Rutter · Hochdorf-Assenheim, DE
• Michael Hesse · Westlake Village, US

Key dates

• Filing date: Feb 10, 2000
• Grant date: Mar 6, 2001
• Expiry date: Feb 10, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer over a heterogeneous catalyst, the polymerization is carried out in the presence of hydrogen.