Abstract:Nickel was directly extracted from crude nickel sulfate solution with new extractant HBL110. The results show that after 5-stage countercurrent extraction, the extraction efficiency of nickel is 98.63%, and extraction efficiency of Fe, Co, Zn, Ca and Mg is 10.41%, 22.86%, 8.42%, 1.75%, and 1.38% respectively under the optimum extraction conditions including saponification ratio of extractant of 60%, initial pH value of 2.2, phase ratio VO︰VA=2︰1, and extraction time of 5 min. Before stripping the organic phase is washed with dilute acid solution, after 4-stage countercurrent stripping, the stripping efficiency of nickel is 98.85%, and nickel concentration in stripping solution is 31.11 g/L with low impurity content under the optimum stripping conditions including concentration of stripping agent of 1.0 mol/L, phase ratio of VO︰VA=4︰1, and stripping time of 5 min.