Process for the purification of carboxylic acids

US4110372A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hansjorg Hey · Hofheim, DE
• Helmut Schaum · Bad Soden am Taunus, DE
• Hans-Jurgen Arpe

Key dates

• Filing date: Aug 12, 1975
• Grant date: Aug 29, 1978
• Expiry date: Aug 12, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B32/40
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the removal of formic acid from a crude mixture thereof with carboxylic acids by reacting the formic acid component of the mixture with a carboxylic anhydride and/or a compound forming an anhydride with a carboxylic acid, which comprises carrying out the reaction in the presence of an acidic catalyst.