Process for the production of bisphenols with the use of new cocatalysts

US5698600A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Claus Wulff · Krefeld, DE
• Gerhard Fennhoff · Willich, DE
• Alfred Eitel · Dormagen, DE

Key dates

• Filing date: Oct 15, 1996
• Grant date: Dec 16, 1997
• Expiry date: Oct 15, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to the synthesis of bisphenols from monophenols and carbonyl compounds such as aldehydes and ketones with concentrated mineral acids such as hydrochloric acid and/or hydrogen chloride gas as acid catalysts and a mercaptan as cocatalyst, which is fixed by an ion-pair bond to a matrix insoluble in the reaction medium.