The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2004
Filed:
Aug. 31, 2001
Rolf Lanze, Krefeld, DE;
Alfred Eitel, St. Johann, AT;
Rainer Neumann, Krefeld, DE;
Steffen Kühling, Meerbusch, DE;
Frieder Heydenreich, Düsseldorf, DE;
Tony van Osselaer, Krefeld, DE;
Rainer Bellinghausen, Odenthal, DE;
Heiko Herold, Neuss, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
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.