Patent · US Expired

Catalyst and method for its production and use

US6417320B1 · kind B1 · utility

33Cited by

6References

30Claims

0Family size

Assignee

Zimmer, Inc. · US

Inventors

Brigitta Otto · Lenzen (Elbe), DE
Karl Ulrich Thiele · Bruchköbel, DE
Xiaogang Guo · Greensburg, US

Key dates

Filing date	Feb 25, 2000
Grant date	Jul 9, 2002
Priority date	—
Expiry date	Feb 25, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J35/45
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The production of linear polyester by the interchange of ester radicals or esterification and polycondensation of multivalent alcohols with multivalent carboxylic acids takes place by means of catalysts. In order that the catalyst features the lowest possible content of catalytically active metal compound, the carrier substance that forms the heterogeneous phase comprises particles of the finest grain and of porous structure and features a surface of great inner, reactive and/or coordinated centers, whereby a catalytically active metal compound is adsorbed in the pores.

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