Process for the preparation of aromatic amines

US8110073B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Bernd Pennemann · Moitzfeld, DE
• Bill Brady · Goldkronach, DE
• Rainer Buse

Key dates

• Filing date: Dec 13, 2007
• Grant date: Feb 7, 2012
• Expiry date: Apr 8, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aromatic amines are produced by catalytic hydrogenation of aromatic nitro compounds. The reaction mixture generated by this hydrogenation is then worked up by distillation in a manner which makes it possible to substantially free the amine of water with increased energy efficiency. Water free of amine and low boilers and the low boiling materials are also obtained.