Process for preparing cyanoacetamide

US6288264A · kind A · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Manuela Imig · Alzenau, DE
• Manfred Kaufhold · Marl, DE
• Thomas Kalz · Herne, DE

Key dates

• Filing date: Feb 27, 2001
• Grant date: Sep 11, 2001
• Expiry date: Feb 27, 2021

Classification

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

Abstract

Cyanoacetamide is prepared without additional catalyst by esterification of crude cyanoacetic acid with a monohydric alcohol which forms an azeotrope with water and has 4 to 10 carbon atoms, reacting the resulting ester with ammonia in the presence of a basic catalyst to give cyanoacetamide, and work-up by a mechanical separating operation and a thermal treatment.