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. 21, 2024
Filed:
Jan. 24, 2022
Applicant:
Casale SA, Lugano, CH;
Inventors:
Leonardo Marrone, Mercallo, IT;
Andrea Beretti, Rovellasca, IT;
Assignee:
Casale SA, Lugano, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C05C 9/00 (2006.01); B01J 2/00 (2006.01); B01J 2/04 (2006.01); B01J 2/16 (2006.01); B01J 2/30 (2006.01); C05G 3/40 (2020.01); C05G 5/12 (2020.01); C05G 5/30 (2020.01); C07C 273/14 (2006.01);
U.S. Cl.
CPC ...
C05C 9/005 (2013.01); B01J 2/003 (2013.01); B01J 2/006 (2013.01); B01J 2/04 (2013.01); B01J 2/16 (2013.01); B01J 2/30 (2013.01); C05G 3/40 (2020.02); C05G 5/12 (2020.02); C05G 5/38 (2020.02); C07C 273/14 (2013.01);
Abstract
A process of granulation of a urea melt, comprising: adding a first additive containing carboxymethyl starch to one or more first stage(s) of the granulation process, to form a carcarboxymethyl starch containing inner layer of urea granules, and adding a second additive containing calcium lignosulfonate to one or more second stage(s) of the granulation process, downstream said first stages, to form granules with a coating containing calcium lignosulfonate.