Separation of Fe and Ni by solvent extraction with LK-C2 from nitric acid leaching solution of wasted printed circuit boards

LK-C2 was used to separate Fe and Ni from the nitric acid leaching solution of wasted printed circuit boards.Fe and Ni were extracted by using 20% LK-C2 in kerosene countercurrently at two stages at pH=3.00 and 10.00,and the extraction rates were 96.14% and 99.35%,respectively.Fe was stripped by 2.00mol/L HCl countercurrently at two stages and the stripping rate was 99.18%.Ni was stripped by 3.00mol/L H2SO4 countercurrently at three stages and the stripping rate was 98.32%.