Method for producing isocyanate

US8957245B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gerhard Olbert · Dossenheim, DE
• Torsten Mattke · Ludwigshafen am Rhein, DE
• Carsten Knoesche · Niederkirchen, DE
• Andreas Daiss · Deidesheim, DE
• Jens Denecke · Speyer, DE

Key dates

• Filing date: Feb 7, 2013
• Grant date: Feb 17, 2015
• Expiry date: Feb 7, 2033

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 process for preparing an isocyanate, which involves contacting fluid streams of amine, phosgene and inert medium in at least one mixing device, such that an inert medium stream is metered at least between one amine stream and one phosgene stream within the mixing device, and then reacting an amine with phosgene in a reaction chamber to form an isocyanate. In this process the inert medium stream is metered such that a point of first contact of the amine and the phosgene occurs at a distance from a surface of the mixing device, and a turbulent flow is present in the reaction chamber.