Processes for preparing low-chlorine isocyanates

US8378140B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Herbert Stutz · Karlsruhe, DE
• Frank Diehl · Schortens, DE
• Alexander Schwarz · Soest, DE
• Rainer Bruns · Leverkusen, DE

Key dates

• Filing date: Aug 21, 2008
• Grant date: Feb 19, 2013
• Expiry date: Jul 21, 2031

Classification

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

Abstract

Processes comprising providing an amine reactant, and reacting the amine reactant with a stream of phosgene in a reaction zone to form a product comprising a corresponding isocyanate, wherein the phosgene stream has a CO content of 0.5% by weight or more.