Liquid-Liquid Extraction and Separation of Co(II) and Ni(II) from Chloride Medium by bis(2,4,4-trimethylpentyl) dithiophosphinic acid in Kerosene

The extraction of Co(II) and Ni(II) from chloride solutions using bis (2,4,4trimethylpentyl) dithiophosphinic acid (CYANEX 301) in kerosene has been investigated. The various factors affecting the extraction process of Co(II) and Ni(II) by the investigated extractant such as contact time, pH, extractant and metal ion concentration as well as temperature, are separately investigated. The stripping of the extracted metal ions from loaded organic solutions is also carried out using different stripping reagents. The results were used to assess the conditions for maximum Co(II)/Ni(II) separation from chloride medium using CYANEX 301.