Method for producing diaryl carbonates

US6469191B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Claus-Peter Reisinger · Wixom, US
• Ursula Jansen · Krefeld, DE
• Johann Rechner · Krefeld, DE
• Rob Eek · Bergen op Zoom, NL

Key dates

• Filing date: Jun 19, 2001
• Grant date: Oct 22, 2002
• Expiry date: Jun 19, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/01
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of an aromatic carbonate is disclosed. Accordingly, an aromatic hydroxy compound is reacted with carbon monoxide and oxygen in the presence of a platinum group metal catalyst, a co-catalyst, a base, and optionally a quaternary salt as well as an inert organic solvent. The reaction is carried out under conditions whereby the inert organic solvent forms an azeotrope with the water arising during the reaction. The azeotrope is then removed from the reaction mixture.