Process for preparing cyclohexanedicarboxylic esters

US6740773B2 · kind B2 · utility

Assignee

• CELANESE CHEMICALS EUROPE GMBH · DE

Inventors

• Hans Bohnen · Niedernhausen, DE
• Thomas Klein · Saratoga, US
• Klaus Bergrath · Oberhausen, DE

Key dates

• Filing date: Jun 3, 2002
• Grant date: May 25, 2004
• Expiry date: Aug 10, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing cyclohexanedicarboxylic esters (hexahydrophthalic diesters) by esterifying the corresponding benzenedicarboxylic acids and immediately hydrogenating the esterification mixture in the presence of nickel catalysts.