Method for the production of polytetrahydrofuran with low color index

US6852869B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christoph Sigwart · Schriesheim, DE
• Anton Meier · Birkenheide, DE
• Michael Hesse · Westlake Village, US
• Volkmar Menger · Neustadt, DE
• Klaus-Peter Pfaff · Friedelsheim, DE
• Arthur Hohn · Tauberbischofsheim, DE
• Lothar Franz · Ludwigshafen, DE

Key dates

• Filing date: Jul 24, 2001
• Grant date: Feb 8, 2005
• Expiry date: Oct 19, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/20
• 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, the polymers obtained by cationic polymerization of tetrahydrofuran are hydrogenated in the presence of a macroporous, supported heterogeneous catalyst comprising at least one metal of groups 7 to 10 of the Periodic Table of the Elements as active metal.