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:
Aug. 10, 2021
Filed:
Mar. 29, 2016
Applicant:
Stamicarbon B.v., Sittard, NL;
Inventors:
Joey Dobree, Sittard, NL;
Johannes Henricus Mennen, Sittard, NL;
Assignee:
Stamicarbon B.V., Sittard, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 19/24 (2006.01); C01C 1/18 (2006.01); C07C 273/04 (2006.01); B01D 3/00 (2006.01); C05C 9/00 (2006.01); C05C 1/00 (2006.01); C07C 273/02 (2006.01); C05G 5/23 (2020.01); B01J 19/00 (2006.01); C07C 273/10 (2006.01); C07C 275/02 (2006.01);
U.S. Cl.
CPC ...
B01D 3/009 (2013.01); B01D 3/00 (2013.01); B01J 19/002 (2013.01); B01J 19/2465 (2013.01); C01C 1/185 (2013.01); C05C 1/00 (2013.01); C05C 9/00 (2013.01); C05G 5/23 (2020.02); C07C 273/02 (2013.01); C07C 273/04 (2013.01); C07C 273/10 (2013.01); C07C 275/02 (2013.01); B01J 2219/00002 (2013.01); B01J 2219/00076 (2013.01); B01J 2219/00105 (2013.01); Y02P 20/10 (2015.11);
Abstract
Disclosed is a method for the integrated production of two different urea products. One is an aqueous urea solution suitable for use in NOx abatement (generally indicated as Diesel Exhaust Fluid—DEF). The other is a solution used as a fertilizer, viz. Urea Ammonium Nitrate (UAN). The production of DEF and UAN are integrated as follows: ammonia recovered from the production of urea is used as a feed to the production of ammonium nitrate. At least part of an aqueous urea stream from urea prodution, is mixed with ammonium nitrate so as to obtain UAN.