Process for the manufacture of bis(4-hydroxyaryl)alkanes

US6486363B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Berg · Krefeld, DE
• Hans-Josef Buysch · Krefeld, DE
• Alfred Eitel · Dormagen, DE
• Gerhard Fennhoff · Willich, DE
• Georg Malamet · Krefeld, DE
• Clauss Wulff · Krefeld, DE

Key dates

• Filing date: Jul 12, 1996
• Grant date: Nov 26, 2002
• Expiry date: Jul 12, 2016

Classification

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

Abstract

The present invention relates to a process for the manufacture of bis(4-hydroxyaryl)alkanes by heterogeneous acid-catalyzed reaction of aromatic hydroxy compounds with ketones in reactors connected in series, which in the direction of advancing conversion are operated with rising temperature and optionally with increasing loading.