Supported catalysts containing a platinum metal and process for preparing diaryl carbonates

US6001768A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Josef Buysch · Krefeld, DE
• Carsten Hesse · Krefeld, DE
• Jorg-Dietrich Jentsch · Pulheim, DE
• Johann Rechner · Krefeld, DE
• Eberhard Zirngiebl

Key dates

• Filing date: Mar 29, 1996
• Grant date: Dec 14, 1999
• Expiry date: Mar 29, 2016

Classification

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

Abstract

In the process for preparing an aromatic carbonate from an aromatic hydroxy compound, CO and O.sub.2 in the presence of a quaternary salt and a base, use is advantageously made of supported catalysts which, in the reaction-ready state, contain a platinum metal, a platinum metal compound or a complex containing a platinum metal compound on a support comprising a metal oxide whose metal can occur in a plurality of oxidation states.