Production of isocyanates in the gaseous phase

US7084297B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Woelfert · Bad Rappenau, DE
• Christian Mueller · Wiesbaden, DE
• Eckhard Stroefer · Mannheim, DE
• Joachim Pfeffinger · Ludwigshafen, DE
• Markus Weber · Langenfeld, DE
• Carsten Knoesche · Niederkirchen, DE

Key dates

• Filing date: Nov 19, 2002
• Grant date: Aug 1, 2006
• Expiry date: Apr 21, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C263/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal dimensions of which have a width/height ratio of at least 2/1.