Method for producing bisphenols

US6828465B2 · 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 16, 2002
• Grant date: Dec 7, 2004
• Expiry date: Mar 6, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/685
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides crystals of an adduct of a bisphenol and a phenol and methods of producing those crystals. The crystals may find use in preparing bisphenols.