Solvent Extraction of Copper from Nitrate Media with Chelating LIX‐Reagents: Comparative Equilibrium Study

Extraction of copper from bacterial leach liquor of a low grade chalcopyrite test heap using LIX 984N-C

“…The mixed reagent for example LIX 984N, shows faster kinetics because of the synergism behavior as compared with other LIX reagents (LIX 860N-I, LIX 84-I, LIX 65N) during the investigation on the extraction of copper from the nitrate/nitric acid solution (Lazarova and Lazarova, 2005). LIX® 984N acts as a very good synergist with Cyanex 301 and their mixture lead to enhance the metal stripping efficiency more effectively from the loaded organic with H 2 SO 4 .…”

“…From the reported literatures (Kul and Cetinkaya, 2009b;Lazarova and Lazarova, 2005), LIX 984N-C was notably found as a very selective chelating extractant towards the extraction of copper metal ion despite of the presence of other impurities in the aqueous solution, while separating the copper ion from the leach solution bearing other metals such as Zn, Pd and Ni. Nevertheless, LIX 984N-C is considered as a strong extractant towards the extraction of copper because of its very good physical performance property.…”

Synergistic Extraction of Copper from Nitrate Solutions Using β-Hydroxy-Naphthaldoxime and Organophosphorus Compounds into Carbon-Tetrachloride

“…Similar behavior was reported by many authors for copper extraction. [41,42] In contrast, the positive entropy changes in all four systems show that copper cations are being transferred from the highly ordered water structure to a more disordered state in the organic phase. [43] The extraction of a copper ion from aqueous phase to organic phase is accompanied by the replacement of a water molecule from the primary coordination sphere.…”

Separation of copper from aqueous sulfate solutions by mixtures of Cyanex 301 and LIX® 984N

“…The extraction process is endothermic. The negative values of the free enthalpy G o received with LIX 984N and LIX 860N-I indicate that the copper extraction with these extractants can be successfully done at relatively low pH values [4]. The solvent extraction of the cations Cu(II), Fe(III), Ga(III), Ni(II), In(III), Co(II), Zn(II) and Pb(II) with LIX® 984 dissolved in n-heptane was explained by Miguel et al [5].…”