Continuous process for preparing aromatic amines

US5563296A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Uwe J. Zarnack · Wittmund, DE
• Fritz Pohl · Wittmund, DE
• Dieter Grenner
• Hartmut Hetzel · Cologne, DE
• Helmut Judat · Langenfeld, DE

Key dates

• Filing date: Jun 30, 1994
• Grant date: Oct 8, 1996
• Expiry date: Jun 30, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/00182
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aromatic diamines and polyamines are produced by a continuous process for the catalytic hydrogenation of the corresponding dinitro and polynitro compounds at elevated temperature. Heat removed from the reaction mixture may be used to produce steam with an overpressure of .gtoreq.2 bar.