Process for the preparation of isocyanates in the gas phase

US7541487B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Fritz Pohl · Wittmund, DE
• Klaus Biskup · Leverkusen, DE
• Rainer Bruns · Leverkusen, DE
• Friedhelm Steffens · Leverkusen, DE
• Herbert Stutz · Karlsruhe, DE

Key dates

• Filing date: Dec 11, 2007
• Grant date: Jun 2, 2009
• Expiry date: Dec 11, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An isocyanate is produced by reacting a primary amine with phosgene in the gas phase above the boiling point of the amine over an average contact time of 0.05 to 15 seconds under adiabatic conditions.