US 12,006,487 B2
Process for making a granule or powder
Frank Jaekel, Ludwigshafen (DE); Astrid Schmidt, Ludwigshafen (DE); and Michael Klemens Mueller, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/280,066
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Sep. 16, 2019, PCT No. PCT/EP2019/074613
§ 371(c)(1), (2) Date Mar. 25, 2021,
PCT Pub. No. WO2020/064379, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 18197041 (EP), filed on Sep. 27, 2018.
Prior Publication US 2021/0317392 A1, Oct. 14, 2021
Int. Cl. C11D 1/04 (2006.01); B01J 2/04 (2006.01); B01J 2/16 (2006.01); C11D 3/20 (2006.01); C11D 3/33 (2006.01); C11D 3/39 (2006.01); C11D 11/00 (2006.01); C11D 17/06 (2006.01)
CPC C11D 11/0082 (2013.01) [B01J 2/04 (2013.01); B01J 2/16 (2013.01); C11D 1/04 (2013.01); C11D 3/33 (2013.01); C11D 3/3942 (2013.01); C11D 17/06 (2013.01)] 9 Claims
 
1. A process for making a powder or granule comprising:
(A) at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA), and
(B) at least one alkali metal salt of a C10-C20 fatty acid,
in a weight ratio of (A):(B) of from 40:1 up to 1,000:1,
wherein said powder or granule contains at least 75% by weight of (A),
wherein the process comprises:
(a) mixing (A) and (B) in the presence of water, and
(b) removing at least 55% of said water by spray-granulation in a fluidized bed or by spray drying using a gas with an inlet temperature of at least 125° C.