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:
Nov. 23, 2010
Filed:
Aug. 01, 2006
Karlheinz Rumpler, Weimar, DE;
Bernhard Wand, Apolda, DE;
Michael Jacob, Weimar, DE;
Reinhard Bober, Weimar, DE;
Reinhard Nowak, Binzen, DE;
Karlheinz Rumpler, Weimar, DE;
Bernhard Wand, Apolda, DE;
Michael Jacob, Weimar, DE;
Reinhard Bober, Weimar, DE;
Reinhard Nowak, Binzen, DE;
Glatt Ingenieurtechnik GmbH, Weimar, DE;
Abstract
A method for producing urea pellets having a narrow range of grain sizes and a sphericity >75% and a defined residual moisture ≦0.5% is provided. The method provides urea pellets having the properties required which meet the requirements of the automotive industry for use thereof in reducing emissions from diesel engines. The method includes spraying a urea-containing liquid having a temperature between ambient temperature and above the melting point of the urea into the high particle density region of the spray zone of a near circular gas, material flow of a spouted bed apparatus and onto the particle surface of the material, which is dried and granulated in the gas flow at a temperature of not more than 130° C. at a controlled heat and mass transfer rate while being separated.