Process for the preparation of organic carbonates having at least one aromatic ester group

US5362901A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Paul Wagner · Mülheim an der Ruhr, DE
• Norbert Schon · Krefeld, DE
• Hans-Josef Buysch · Krefeld, DE

Key dates

• Filing date: May 25, 1993
• Grant date: Nov 8, 1994
• Expiry date: May 25, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The title compounds are prepared from organic carbonates having at least one aliphatic ester group and phenolic compounds by transesterification in the presence of a transesterification catalyst known per se at 60.degree.-320.degree. C. in a column-type reactor with multiple recycling of the reaction products into this reactor with intermediate storage of the product streams.