Method for producing cyclohexane dicarboxylic acids and the derivatives thereof

US7319161B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ralf Noe · Mannheim, DE
• Hartmut Hibst · Schriesheim, DE
• Klaus Halbritter · Heidelberg, DE
• Melanie Maas-Brunner · Mannheim, DE
• Boris Breitscheidel · Fulda, DE
• Gerd Kaibel · Lampertheim, DE
• Klemens Massonne · Bad Dürkheim, DE
• Axel Salden · Stuttgart, DE
• Klaus Ebel · Lampertheim, DE
• Eike Johannes Bergner · Schriesheim, DE
• Frank Haese · Bollingstedt, DE

Key dates

• Filing date: Feb 15, 2002
• Grant date: Jan 15, 2008
• Expiry date: Jul 25, 2023

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 acids or derivatives thereof, such as esters and/or anhydrides, encompassing the reaction of diene/maleic acid anhydride mixtures, in particular of butadiene/maleic acid anhydride mixtures or of mixtures of maleic acid anhydrides and C5-dienes to give alkyl-substituted or unsubstituted cyclohexenedicarboxylic acid anhydrides in the condensed phase, ester formation, and then hydrogenation to give the corresponding cyclohexanedicarboxylic acid derivative, and also to the use of the cyclohexanedicarboxylic acids or derivatives thereof prepared according to the invention as plasticizers for plastics.