Precursor for alkoxylation catalysts

US5840995A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Mayer · Guilderland, US
• Joachim Hess · Ingolstadt, DE
• Alfred Babiel · Villmar, DE

Key dates

• Filing date: Dec 13, 1996
• Grant date: Nov 24, 1998
• Expiry date: Dec 13, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/985
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A precursor for alkoxylation catalysts is prepared by reacting a chelating anionic or nonionic phase transfer catalyst with an alkaline earth metal compound in the presence of a compound which can be alkoxylated. Suitable phase transfer catalysts are, in particular, ethoxylated fatty alcohols, ether carboxylic acids, ether sulfonic acids or ether phosphonic acids. Addition of sulfuric acid to such a precursor produces an alkaline earth metal sulfato complex which is the actual catalyst for the alkoxylation.