Process for the manufacture of cyclohexene dicarboxylic acid esters

US4024173A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Arnold Lenz · Kornwestheim, DE
• Otto Bleh
• Harald VON Metnitz

Key dates

• Filing date: Dec 10, 1974
• Grant date: May 17, 1977
• Expiry date: Dec 10, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/303
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The hydrogenation of benzene dicarboxylic acid mono and diesters to corresponding cyclohexene dicarboxylic acid mono and diesters by carrying out the hydrogenation in the active and effective presence of alkalimetal amalgam and an alcohol in a substantially anhydrous environment. The hydrogenation reaction medium should be a mixture of the above referred to alcohol and an aromatic hydrocarbon such as toluene.