Process for the hydrodehalogenation of halogenated benzenes

US5545779A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Pies · Duisburg, DE
• Josef Kasbauer · Wermelskirchen, DE
• Helmut Fiege · Leverkusen, DE

Key dates

• Filing date: Oct 6, 1994
• Grant date: Aug 13, 1996
• Expiry date: Oct 6, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Halogenated benzenes are hydrodehalogenated in a particularly advantageous manner and at low temperatures by contacting them at temperatures of between 100.degree. and 250.degree. C. together with hydrogen with a catalyst prepared by application of one or more salts of palladium and/or platinum and, if desired, of copper to an alumina or titanium dioxide support.