Fluidised bisphenol dust

US6683223B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Oct 15, 2002
• Grant date: Jan 27, 2004
• Expiry date: Oct 15, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for fluidizing bisphenol dust is disclosed. The process entails adding 0.1 to 10 parts by weight of water per 1 part by weight of bisphenol dust. Also disclosed is a process for preparing a bisphenol wherein the fluidized bisphenol dust according to the invention is introduced before, during or after reaction of a phenol with a carbonyl compound.