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:
May. 05, 2020
Filed:
Jan. 31, 2017
Applicant:
Stamicarbon B.v., Sittard, NL;
Inventors:
Jozef Hubert Meessen, Sittard, NL;
Pantelis Orfanidis, Vouliagmeni, GR;
Assignee:
Stamicarbon B.V., Sittard, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C05C 3/00 (2006.01); B01D 53/54 (2006.01); C01C 1/12 (2006.01); C07C 273/16 (2006.01); C05C 9/00 (2006.01); B01D 53/58 (2006.01); B01D 53/80 (2006.01); C01C 1/22 (2006.01);
U.S. Cl.
CPC ...
C05C 3/00 (2013.01); B01D 53/54 (2013.01); B01D 53/58 (2013.01); B01D 53/80 (2013.01); C01C 1/12 (2013.01); C01C 1/22 (2013.01); C05C 3/005 (2013.01); C05C 9/00 (2013.01); C07C 273/16 (2013.01); B01D 2251/506 (2013.01); B01D 2257/406 (2013.01); B01D 2257/70 (2013.01);
Abstract
The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.