Process for preparing carboxylic esters

US6916950B2 · kind B2 · utility

Assignee

• OXENO OLEFINCHEMIE GMBH · DE

Inventors

• Dietmar Gubisch · Marl, DE
• Uwe Ernst · Mannheim, DE
• Wilfried Bueschken · Haltern, DE

Key dates

• Filing date: Sep 5, 2001
• Grant date: Jul 12, 2005
• Expiry date: Sep 5, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Carboxylic esters are prepared by a process, which comprises reacting dicarboxylic or polycarboxylic acids or their anhydrides with alcohols in a liquid medium with the concomitant removal of water formed by the esterification reaction by azeotropic distillation together with the alcohol in the medium, wherein the amount of liquid removed from the reaction medium by azeotropic distillation is replaced in whole or in part with the alcohol.