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Copper recovery from ore by liquid-liquid extraction using aqueous two-phase system.

Journal of hazardous materials (2012-09-11)
Leandro Rodrigues de Lemos, Igor José Boggione Santos, Guilherme Dias Rodrigues, Luis Henrique Mendes da Silva, Maria C Hespanhol da Silva
ABSTRACT

We investigated the extraction behavior of Cu(II) in the aqueous two-phase system (ATPS) formed by (L35+MgSO(4)+H(2)O) or (L35+(NH(4))(2)SO(4)+H(2)O) in the presence of the extracting agent 1-(2-pyridylazo)-2-naphthol (PAN). At pH=3 and a PAN concentration of 0.285 mmol kg(-1), both ATPS lead to the effective separation of Cu(II) from other metallic ions (Zn(II), Co(II), Ni(II) and Fe(III)). High separation factors range between 1000 and 10,000 were obtained for the extraction of Cu(II) and concomitant metallic ions. This ATPS was used for the extraction of Cu(II) from a leached ore concentrate with a extraction percentage of 90.4 ± 1.1%; other metals were mainly located in the bottom phase.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
聚丙二醇, P 2,000
Sigma-Aldrich
聚(丙二醇), average Mn ~2,000
Sigma-Aldrich
聚(丙二醇), average Mn ~425
Sigma-Aldrich
聚(丙二醇), average Mn ~4,000
Sigma-Aldrich
1-(2-吡啶偶氮)-2-萘酚, indicator grade
Sigma-Aldrich
聚(丙二醇), average Mn ~1,000
Sigma-Aldrich
聚(丙二醇), average Mn ~725
Sigma-Aldrich
聚(丙二醇), average Mn ~2,700