Abstract:Nickel was directly extracted from sulfuric acid pressure leaching lixivium of laterite with new extractant HBL110. The effects of extractant concentration, equilibrium pH value, and phase ratio on nickel extraction were investigated and extraction isotherm curve of nickel was plotted. The results show that the extraction rate of nickel is 96% in single stage extraction under the conditions including extractant volume fraction of 50% HBL110 in 50% sulfonated kerosene, pH value of 2.6, saponification ratio of organic phase of 60%, volume ratio of oil phase to aqueous phase of O/A=1/1, and extracting duration of 5 min at 30 ℃. The extraction rate of nickel is 99% under five-stage counter current extraction with O/A=1/2. After washed by dilute sulfuric acid solution, nickel in loaded organic is stripped with 100 g/L H2SO4 solution and nickel stripping rate is 98.5% in four-stage counter current stripping with O/A=4/1 at 30 ℃ for 10 min. Nickel concentration in purified stripping solution is 40 g/L with low impurity content.