Process for the preparation of optionally substituted benzoyl chloride

US4276231A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Walter Bockmann · Krefeld, DE
• Karl-August Lipper · Krefeld, DE
• Friedrich Bruhne · Krefeld, DE

Key dates

• Filing date: Sep 4, 1979
• Grant date: Jun 30, 1981
• Expiry date: Sep 4, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/58
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of optionally substituted benzoyl chloride from optionally substituted benzotrichloride at elevated temperature in the presence of a catalyst is described wherein optionally substituted benzotrichloride or a mixture thereof with optionally substituted benzoyl chloride is reacted with an excess of 1 to 20 mol percent of optionally substituted benzoic acid and/or water and the hydrogen chloride-containing off-gases formed during the reaction are washed with optionally substituted benzotrichloride or the mixture of optionally substituted benzotrichloride and optionally substituted benzoyl chloride.