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. 13, 2018
Filed:
Oct. 12, 2012
Applicant:
Stamicarbon B.v., Sittard, NL;
Inventor:
Johannes Henricus Mennen, Sittard, NL;
Assignee:
STAMICARBON B.V., Sittard, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 273/16 (2006.01); C07C 273/14 (2006.01); B01J 2/22 (2006.01); B01J 2/30 (2006.01); B29C 43/00 (2006.01); C05C 9/02 (2006.01); C05C 9/00 (2006.01); B29K 75/00 (2006.01);
U.S. Cl.
CPC ...
C07C 273/16 (2013.01); B01J 2/22 (2013.01); B01J 2/30 (2013.01); B29C 43/006 (2013.01); C07C 273/14 (2013.01); B29K 2075/02 (2013.01); C05C 9/005 (2013.01); C05C 9/02 (2013.01); Y10T 29/49716 (2015.01);
Abstract
Disclosed is a method for urea finishing. A urea solution is subjected to crystallization and, other than in conventional processes, the urea crystals are shaped by exerting mechanical force onto them. Thus, the conventional prilling or granulation finishing steps can be avoided, and so are the corresponding emissions of ammonia and/or dust. The crystallization comprises a flash crystallization. The invention also pertains to the urea particles obtainable by the process, to a urea plant, and to a method of modifying an existing urea plant.