US 12,473,515 B2
Granules or powders and methods for their manufacture
Marta Reinoso Garcia, Ludwigshafen (DE); Juergen Detering, Ludwigshafen (DE); Carsten Sueling, Ludwigshafen (DE); Kati Schmidt, Ludwigshafen (DE); Michael Klemens Mueller, Ludwigshafen (DE); Gazi Tuerkoglu, Ludwigshafen (DE); and Thomas Schmidt, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/052,364
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Apr. 25, 2019, PCT No. PCT/EP2019/060638
§ 371(c)(1), (2) Date Nov. 2, 2020,
PCT Pub. No. WO2019/211170, PCT Pub. Date Nov. 7, 2019.
Claims priority of application No. 18170869 (EP), filed on May 4, 2018.
Prior Publication US 2021/0179978 A1, Jun. 17, 2021
Int. Cl. C11D 3/33 (2006.01); C11D 3/12 (2006.01); C11D 3/37 (2006.01); C11D 7/06 (2006.01); C11D 11/00 (2006.01); C11D 11/02 (2006.01); C11D 17/06 (2006.01)
CPC C11D 11/02 (2013.01) [C11D 3/1246 (2013.01); C11D 3/33 (2013.01); C11D 3/3719 (2013.01); C11D 3/3761 (2013.01); C11D 3/3769 (2013.01); C11D 7/06 (2013.01); C11D 11/0082 (2013.01); C11D 17/06 (2013.01); C11D 2111/14 (2024.01)] 8 Claims
 
1. A process for manufacturing a granule or powder, said process comprising:
(a) providing an aqueous solution or slurry comprising:
(A) a chelating agent having formula (I a) or formuala (I b):
[CH3—CH(COO)—N(CH2—COO)2]M3-xHx  (I a)
[OOC—CH2CH2—CH(COO)—N(CH2—COO)2]M4-xHx  (I b),
wherein M is selected from the group consisting of an alkali metal cation and ammonium, and x is in a range of from 0.01 to 1.0 in formula (I a) and in a range of from 0.01 to 2.0 in formula (I b), and
(B) a polymer selected from the group consisting of:
(B1) a polyaspartate having an average molecular weight Mw in a range of from 1,000 to 20,000 g/mole, and
(B2) a copolymer comprising, in copolymerized form:
(α) an ester of an ethylenically unsaturated mono- or dicarboxylic acid, and
(β) an ethylenically unsaturated N-containing monomer; and
(b) spray drying or granulating said aqueous solution or slurry.