Patent · US Expired

Catalyst and method for the production of polytetrahydrofuran

US7041752B2 · kind B2 · utility

5Cited by

12References

15Claims

0Family size

Assignee

BASF SE

Inventors

Stephan Schlitter · Schifferstadt, DE
Christoph Sigwart · Schriesheim, DE
Walter Dorflinger · Östringen, DE
Michael Hesse · Westlake Village, US
Rolf Fischer · Heidelberg, DE

Key dates

Filing date	Jun 24, 2002
Grant date	May 9, 2006
Priority date	—
Expiry date	Dec 9, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J35/651
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which is in the form of shaped catalyst bodies or catalyst particles having a volume of the individual shape of the body or particle of at least 0.05 mm3, preferably at least 0.2 mm3, in particular 1 mm3, and has at least one of the features a) and b):

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.