US 11,987,535 B2
Urea granules comprising lignosulfonate coating
Leonardo Marrone, Mercallo (IT); and Andrea Beretti, Rovellasca (IT)
Assigned to Casale SA, Lugano (CH)
Filed by Casale SA, Lugano (CH)
Filed on Jan. 24, 2022, as Appl. No. 17/582,751.
Application 17/582,751 is a division of application No. 17/259,692, previously published as PCT/EP2019/067357, filed on Jun. 28, 2019.
Claims priority of application No. 18183134 (EP), filed on Jul. 12, 2018.
Prior Publication US 2022/0144715 A1, May 12, 2022
Int. Cl. 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)
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)] 4 Claims
OG exemplary drawing
 
1. A urea granular product comprising granules made of at least 96% wt. urea with a layer containing carboxymethyl starch and a coating layer containing calcium lignosulfonate.