US 12,240,000 B2
Iron chelators as activators in alkaline flotation circuits
Adrian Mauricio Villanueva Berindoague, Ludwigshafen (DE); Dale Barron, Aukland (NZ); Daniel Chipfunhu, Kwinana (AU); Alexej Michailovski, Ludwigshafen (DE); Scott Alexander Dickie, Auckland (NZ); Marta Reinoso Garcia, Ludwigshafen (DE); and Deris Prawira, Jakarta (ID)
Assigned to BASF SE, Ludwigshafen am Rein (DE)
Appl. No. 17/256,710
Filed by BASF SE, Ludwigshafen am Rein (DE)
PCT Filed Jul. 3, 2019, PCT No. PCT/EP2019/067895
§ 371(c)(1), (2) Date Dec. 29, 2020,
PCT Pub. No. WO2020/007935, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. PCT/EP2018/068102 (WO), filed on Jul. 4, 2018.
Prior Publication US 2021/0260603 A1, Aug. 26, 2021
Int. Cl. B03D 1/016 (2006.01); C02F 1/24 (2023.01); C02F 1/52 (2023.01); C22B 11/00 (2006.01); C02F 1/54 (2023.01); C02F 103/10 (2006.01); C22B 3/20 (2006.01); C22B 15/00 (2006.01)
CPC B03D 1/016 (2013.01) [C02F 1/24 (2013.01); C02F 1/5272 (2013.01); C22B 11/042 (2013.01); B03D 2201/007 (2013.01); B03D 2203/025 (2013.01); C02F 1/54 (2013.01); C02F 2103/10 (2013.01); C22B 3/20 (2013.01); C22B 15/0089 (2013.01)] 11 Claims
 
1. A method for selectively recovering a mineral from an iron comprising ore, comprising:
i) grinding the iron comprising ore,
ii) preparing a pulp of the ground ore obtained in step i),
iii) adding at least one promoter comprising at least one substituted polymeric alkylene diamine as an iron chelator to the pulp obtained in step ii), wherein the at least one substituted polymeric alkylene diamine is a substituted polymeric ethylene diamine of formula (IIb)

OG Complex Work Unit Chemistry
wherein m is in the range of 1 to 150, the substituents R5 are independently from each other H, Li, Na or K, and * is Z2N, where Z is independently from each other

OG Complex Work Unit Chemistry
Y is a carboxylate (—COOR5), sulfonate (—SO3R6), sulfate (—O—SO3R7), phosphonate (—P(═O)(OR8)(OR9), phosphate (—O—P(═O)(OR10)(OR11) carboxylic acid (—COOH), sulfonic acid (—SO3H), phosphonic acid (—P(═O)(OH)2), phosphoric acid (—O—P(═O)(OH)2) moiety, or their deprotonated forms,
R5, R6 and R7 are independently from each other H, alkyl, aryl, alkylaryl or arylalkyl, Li, Na or K, R8 and R10 are independently from each other alkyl, aryl, alkylaryl or arylalkyl, and
R9 and R11 are independently from each other H, alkyl, aryl, alkylaryl or arylalkyl; and
iv) subjecting the pulp containing the at least one promoter obtained in step iii) to froth flotation.