Method and device for producing bisphenol a prills and bisphenol a prills produced according to this method

US6689464B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rolf Lanze · Krefeld, DE
• Alfred Eitel · Dormagen, DE
• Rainer Neumann · Krefeld, DE
• Steffen Kuhling · Meerbusch, DE
• Frieder Heydenreich · Düsseldorf, DE
• Tony van Osselaer · Krefeld, DE
• Rainer Bellinghausen · Neunburg vorm Wald, DE
• Heiko Herold · Dormagen, DE

Key dates

• Filing date: Aug 31, 2001
• Grant date: Feb 10, 2004
• Expiry date: Aug 31, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for producing bisphenol A in prill form is disclosed. Molten bisphenol is top-fed into a prilling tower via a plate containing a plurality of nozzles. A gas coolant guided through a circuit is led into said tower in a counter flow direction. The prills are cooled to about room temperature, collected at the bottom of the tower and removed. Also disclosed is the device for carrying out the inventive method and the prills thus produced.