Process for manufacturing unsaturated carboxylic acid anhydrides

US6936734B2 · kind B2 · utility

Assignee

• ROEHM GMBH & CO. KG · DE

Inventors

• Bardo Schmitt · Mainz, DE
• Joachim Knebel · Zwingenberg, DE
• Wolfgang Klesse · Mainz, DE
• Andrea Wittkowski · Groß-Umstadt, DE
• Benedikt Laux · Monzernheim, DE

Key dates

• Filing date: Feb 11, 2002
• Grant date: Aug 30, 2005
• Expiry date: Jul 19, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/56
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing an unsaturated carboxylic acid anhydride by reacting an unsaturated carboxylic acid and a lower aliphatic carboxylic acid anhydride in the presence of a stabilizer and catalyst that contains a metal salt of an anionic organic compound which has at least one carboxyl group.