US 12,358,851 B2
Method for the continuous production of a mixture with a pre-defined ratio of fully colored and non-colored fertilizer particles and system and use thereof
Samuel Odu, Terneuzen (NL); Thomas Fahrenwaldt, Ribnitz-Damgarten (DE); and Christian Ross, Käterhagen (DE)
Assigned to YARA INTERNATIONAL ASA, Oslo (NO)
Appl. No. 17/779,938
Filed by Yara International ASA, Oslo (NO)
PCT Filed Dec. 4, 2020, PCT No. PCT/EP2020/084613
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/110906, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 19213576 (EP), filed on Dec. 4, 2019.
Prior Publication US 2023/0002292 A1, Jan. 5, 2023
Int. Cl. C05G 5/30 (2020.01); B05D 5/06 (2006.01); C05C 1/02 (2006.01); C05G 5/10 (2020.01)
CPC C05G 5/37 (2020.02) [B05D 5/06 (2013.01); C05C 1/02 (2013.01); C05G 5/10 (2020.02)] 10 Claims
OG exemplary drawing
 
1. A method for a continuous production of a mixture of fully colored and non-colored fertilizer particles having a median size of about 1 to 6 mm with a predefined ratio of the fully colored and non-colored fertilizer particles, starting from a stream A of non-colored fertilizer particles, comprising steps of:
a1) continuously separating the stream A of the non-colored fertilizer particles into a stream C of non-colored fertilizer particles and one or more parallel streams B1, B2, . . . Bn of non-colored fertilizer particles in the predefined ratio;
b1) continuously coloring the non-colored fertilizer particles from the parallel streams B1, B2, . . . Bn obtained from step a1) with a non-rub-off coloring agent, such that the non-colored fertilizer particles become fully colored;
c1) continuously joining the parallel streams B1, B2, . . . Bn, now comprising the fully colored fertilizer particles, obtained from step b1), with the stream C of the non-colored fertilizer particles downstream of the separation step a1), thereby obtaining the mixture of the fully colored and non-colored fertilizer particles, and;
d1) optionally, processing the mixture of the fully colored and non-colored fertilizer particles, obtained from step c1).