Bisphenol phenol adducts

US6906227B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rainer Neumann · Krefeld, DE
• Rolf Lanze · Krefeld, DE
• Frieder Heydenreich · Düsseldorf, DE
• Michael Bödiger · Dormagen, DE
• Michael Prein · Brasschaat, BE

Key dates

• Filing date: Dec 7, 2000
• Grant date: Jun 14, 2005
• Expiry date: Dec 7, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/82
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The application relates to a process for producing high-purity bis(4-hydroxyaryl)alkanes from adducts of bis(4-hydroxyaryl)alkanes and aromatic hydroxy compounds, which are obtained by acid-catalysed reaction of the aromatic hydroxy compounds with ketones.