Process for the dechlorination and/or debromination of fluorine-and chlorine- and/or bromine-containing aromatic compounds

US5283378A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dietmar Bielefeldt · Ratingen, DE
• Albrecht Marhold · Leverkusen, DE

Key dates

• Filing date: Sep 29, 1992
• Grant date: Feb 1, 1994
• Expiry date: Sep 29, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/65
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Fluorine- and chlorine- and/or bromine-containing aromatic compounds are dechlorinated and/or debrominated with hydrogen in an industrially advantageous and selective manner, if the palladium catalyst is present in stationary phase and the aromatic compound in gas phase.