Electrochemical process for the replacement of halogen atoms in an organic compound

US4800012A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Steffen Dapperheld · Hofheim, DE
• Rudolf Heumuller · Hong Kong, CN
• Manfred Wildt · Brombachtal, DE

Key dates

• Filing date: Feb 16, 1988
• Grant date: Jan 24, 1989
• Expiry date: Feb 16, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B3/25
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The existing processes for the preparation of halogenoacrylic acids and deuterated derivatives thereof have to be carried out using chemicals which are in some cases very toxic or very expensive. Electrochemical reduction, however, makes it possible to eliminate one or more halogen atoms selectively from halogenoacrylic and halogenomethacrylic acids and derivatives thereof, and to replace these by hydrogen or deuterium atoms. This is effected by electrolyzing the acids or derivatives thereof in a solution containing water or deuterium oxide at a temperature from -10.degree. C. up to the boiling point of the electrolysis liquid.