Process for the preparation of 2-chloroacrylonitrile

US5679826A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Franz-Josef Mais · Düsseldorf, DE
• Thomas Essert · Overath, DE
• Helmut Fiege · Leverkusen, DE
• Friedrich Durholz
• Guido Steffan · Odenthal, DE

Key dates

• Filing date: Oct 23, 1996
• Grant date: Oct 21, 1997
• Expiry date: Oct 23, 2016

Classification

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

Abstract

2-Chloroacrylonitrile is prepared in a particularly advantageous and readily industrially practicable manner by chlorinating acrylonitrile and then thermally cleaving the 2,3-diehloropropionitrile formed, by chlorinating acrylonitrile in the presence of a catalyst system comprising dimethylformamide and pyridine and/or pyridine derivatives and subjecting the resulting crude 2,3-dichloropropionitrile to thermal cleavage in the presence of the same catalyst system without the addition of further catalysts.