Process for the preparation of isocyanic acid by the decomposition of N,N-disubstituted ureas

US5360601A · kind A · utility

Assignee

• Chemie Linz Gesellschaft m.b.H. · AT

Inventors

• Kurt A. Hackl · Linz, AT
• Martin Mullner · Traun, AT
• Erich Schulz · Ansfelden, AT
• Gerhard Stern · Linz, AT
• Heinz Falk · Linz, AT

Key dates

• Filing date: Aug 13, 1993
• Grant date: Nov 1, 1994
• Expiry date: Aug 13, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01C3/001
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of isocyanic acid, characterized in that N,N-disubstituted ureas are decomposed at elevated temperature to a secondary amine of lower volatility and to isocyanic acid, which is drawn off at the top.