Process for preparing aryl carbonates

US5473094A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Pieter Ooms · Krefeld, DE
• Norbert Schon · Krefeld, DE
• Hans-Josef Buysch · Krefeld, DE

Key dates

• Filing date: Jul 7, 1994
• Grant date: Dec 5, 1995
• Expiry date: Jul 7, 2014

Classification

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

Abstract

Carbonates with aromatic ester groups may be prepared by reacting aromatic monohydroxy compounds with phosgene or with chloroformates of aromatic monohydroxy compounds, wherein reaction takes place at a temperature in the range 50.degree. to 350.degree. C. in the presence of aluminum oxides as heterogeneous catalysts.