Process for the preparation and purification of nitroaromatics

US5395995A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dieter Grenner
• Thomas Schieb · Rösrath, DE
• Gerhard Wiechers · Leverkusen, DE

Key dates

• Filing date: May 10, 1993
• Grant date: Mar 7, 1995
• Expiry date: May 10, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C201/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation and purification of nitroaromatics by nitration of the corresponding aromatics and subsequent melt crystallization. The residual melts which occur are recycled.