Method for producing dis(4-hydroxyaryl) alkanes

US6316678A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Steffen Kuhling · Meerbusch, DE
• Rolf Lanze · Krefeld, DE
• Rainer Neumann · Krefeld, DE
• Frieder Heydenreich · Düsseldorf, DE
• Tony van Osselaer · Krefeld, DE
• Gerhard Fennhoff · Willich, DE

Key dates

• Filing date: Feb 28, 2001
• Grant date: Nov 13, 2001
• Expiry date: Feb 28, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C39/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for producing bis(4-hydroxy-aryl)alkanes of high purity from addition products of bis(4-hydroxy-aryl)alkanes and aromatic hydroxy compounds which are obtained by the acid-catalysed reaction of the aromatic hydroxy compounds with ketones.