Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds

US5780690A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Berg · Krefeld, DE
• Gerhard Fennhoff · Willich, DE
• Ralf Pakull · Krefeld, DE
• Hans-Josef Buysch · Krefeld, DE
• Bernhard Wehrle · Langenfeld, DE
• Alfred Eitel · Dormagen, DE
• Claus Wulff · Krefeld, DE
• Jurgen Kirsch · Cologne, DE

Key dates

• Filing date: Apr 8, 1997
• Grant date: Jul 14, 1998
• Expiry date: Apr 8, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the synthesis of bis-(4-hydroxyphenyl)-alkanes on ion-exchange resins or mixtures of ion-exchange resins which are modified with alkyl-SH groups, wherein the monophenols and carbonyl compounds to be used have first been purified to remove substances which can transfer alkyl groups.