CYANEX® 301 binary extractant systems in cobalt/nickel recovery from acidic sulphate solutions

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

“…Synergistic enhancements of cobalt and nickel extraction form chloride and sulfate media with mixtures of Cyanex 301 and amine extractants have been observed [32,33]. A large synergistic effect on the stripping kinetics and efficiencies of cobalt and nickel from was also observed.…”

Separation of Co(II) from Zinc Plant Acidic Thiocyanate Leach Solutions Containing Co(II) and Ni(II) by Solvent Extraction Using Trioctylamine in Toluene

“…The species extracted depends on many factors, such as the equilibrium pH, the extractant and metal concentrations, and the solvent phase properties [18]. It is known that extractants such as amines and solvating extractants become polymerized or self-associated in organic diluents [19].…”

Extraction and separation of Co(II) and Ni(II) from acidic sulfate solutions using Aliquat 336

“…The gradual decrease in the extraction of cobalt which is accompanied by gradual increase in the extraction of nickel can be explained by the competition between cobalt and nickel and by a progressive replacement of the cobalt by nickel as nickel is loaded into the organic phase [26]. While the extraction of cobalt is relatively fast, it is well known that generally the extraction of nickel is quite slow [26]. Therefore, the equilibrium of Co(II) in sulfate medium at 20 min in presence of Ni(II) was studied.…”