Process for preparing cyanoformamide

US4082796A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wilhelm Riemenschneider · Frankfurt am Main, DE
• Peter Wegener · Königstein, DE

Key dates

• Filing date: Dec 19, 1975
• Grant date: Apr 4, 1978
• Expiry date: Dec 19, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C255/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cyanoformamide is prepared when cyanogen is contacted with a catalyst solution containing low molecular aliphatic carboxylic acids, from 0.025 to 1.0 mole/1 of copper-(II)-salts and up to 5% by weight of water. Hydrogen cyanide can be used instead of cyanogen, if the catalyst solution contains nitrate ions in addition.