Process for preparing aromatic amines

US5744643A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Matthias Beller · Ostseebad Nienhagen, DE
• Ahmed M. Tafesh · Acre, IL
• Christian Kohlpaintner · Kelkheim, DE
• Christoph Naumann · Niedernhausen, DE

Key dates

• Filing date: Feb 21, 1996
• Grant date: Apr 28, 1998
• Expiry date: Feb 21, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C253/30
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing aromatic amines by reacting an aromatic nitro compound with carbon monoxide in a solvent mixture comprising water and a water-insoluble organic solvent by means of a catalyst comprising palladium and a water-soluble phosphine under a pressure of from 5 to 300 bar and at a temperature of from 50 to 200.degree. C., and separating the aqueous phase and the organic phase.