Process for the production of aryl carbonates

US6175017A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Josef Buysch · Krefeld, DE
• Norbert Schon · Krefeld, DE
• Gunther Jeromin · Krefeld, DE

Key dates

• Filing date: Aug 18, 1993
• Grant date: Jan 16, 2001
• Expiry date: Aug 18, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of carbonates containing aromatic ester groups is disclosed. The process entails reacting aromatic monohydroxy componds with phosgene or with chlorocarbonic acid esters of aromatic monohydroxy compounds at a temperature of 50 to 350.degree. C. and in the presence of active carbon as catalyst.