Process for preparing an isocyanate

US8853443B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Daniel Breuninger · Frankenthal (Pfalz), DE
• Johannes Adam · Dresden, DE
• Heiner Schelling · Ludwigshafen, DE
• Eckhard Stroefer · Mannheim, DE
• Markus Kraemer · Radebeul, DE
• Matthias Eiermann · Schifferstadt, DE
• Kai Thiele · Ekeren, BE
• Michael Zoellinger · Eislingen/Fils, DE
• Rolf Pinkos · Bad Dürkheim, DE

Key dates

• Filing date: Nov 18, 2009
• Grant date: Oct 7, 2014
• Expiry date: May 22, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C265/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing an isocyanate, comprising hydrogenating a mixture (Gi) comprising an amine in the presence of a hydrogenation catalyst comprising copper to obtain a mixture (Gii) comprising the amine, and reacting the mixture (Gii) with phosgene to obtain a mixture (Giii) comprising the isocyanate. The present invention further relates to the isocyanate preparable by this process.