Fluidised bisphenol dust

• US 20030144560A1
• Filed: 10/15/2002
• Published: 07/31/2003
• Est. Priority Date: 12/23/1999
• Status: Active Grant

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Lanze, Rolfe, Prein, Michael, Neumann, Rainer, Bodiger, Michael, Heydenreich, Frieder, Kostyszyn, Nikolai
• Granted Patent: US 6,683,223 B2
• Time in Patent Office: Days
• US Class Current: 568/728
• CPC Class Codes: B01J 2/00 Processes or devices for granulating materials , e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
• CPC Class Codes: C07C 39/16 Bis-(hydroxyphenyl) alkanes; Tris-(hydroxyphenyl)alkanes

Abstract

The invention relates to fluidised bisphenol dust consisting of bisphenol dust and water, to a method for producing the same and to a method for producing a bisphenol, whereby fluidised bisphenol dust is added during production.

Claims

1. A process for fluidising bisphenol dust, consisting of adding 0.1 to 10 parts by weight of water per 1 part by weight of bisphenol dust.

2. A process according to claim 1, wherein the bisphenol dust is bisphenol A dust.

3. Fluidised bisphenol dust containing 0.1 to 10 parts by weight of water per 1 part by weight of bisphenol dust.

5. A process for preparing a bisphenol, wherein fluidised bisphenol dust according to claim 3 is supplied to the process before, during or after reaction of a phenol with a carbonyl compound.

6. A process according to claim 5, wherein the bisphenol dust is bisphenol A dust and the phenol is unsubstituted phenol and the carbonyl compound is acetone.

4. Fluidised bisphenol A dust containing 0.1 to 10 parts by weight of water per 1 part by weight of bisphenol A dust.