US 12,275,019 B2
Method for flotation of a silicate-containing iron ore with a cationic collector
Alexej Michailovski, Ludwigshafen (DE); Alexander Panchenko, Ludwigshafen (DE); Hannes Ferdinand Zipfel, Ludwigshafen (DE); Martin Ernst, Ludwigshafen (DE); Gabriela Budemberg, Ludwigshafen (DE); Stefanov Nedko Drebov, Ludwigshafen (DE); Sylvia von Krog, Ludwigshafen (DE); Tamara Kuelzer, Ludwigshafen (DE); and Long Phan, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/606,997
Filed by BASF SE, Ludwigshafen am Rein (DE)
PCT Filed Apr. 27, 2020, PCT No. PCT/EP2020/061604
§ 371(c)(1), (2) Date Oct. 27, 2021,
PCT Pub. No. WO2020/221685, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 19171801 (EP), filed on Apr. 30, 2019.
Prior Publication US 2022/0212204 A1, Jul. 7, 2022
Int. Cl. B03D 1/01 (2006.01); C07C 215/18 (2006.01)
CPC B03D 1/01 (2013.01) [C07C 215/18 (2013.01); B03D 2201/02 (2013.01); B03D 2203/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by a reverse flotation, method comprising:
adding a compound of formula I

OG Complex Work Unit Chemistry
wherein R1 is C9-C22 alkyl or alkenyl, which is linear or branched, R2 is H or C1-C4 alkyl, which is linear or branched, R3 is -X-NH2, H or C1-C4 alkyl, which is linear or branched, and X is C2-C4 alkylene, which is linear or branched, or
a salt of a protonated compound of formula I and an anion,
to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture.