Process for the preparation of nitrodiphenylamines

US6235937A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Henry Giera · Wittlich, DE
• Walter Lange · Cologne, DE
• Torsten Pohl · Cambridge, US
• Adolf Sicheneder · Hohenlockstedt, DE
• Christoph Schild · Leverkusen, DE

Key dates

• Filing date: Aug 31, 2000
• Grant date: May 22, 2001
• Expiry date: Aug 31, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/824
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogenobenzenes with aromatic amines in the presence of a palladium catalyst and a base, the base being ground and/or dried before its use.