Process for separating copper in nickel-cobalt-copper system by solvent extraction method
An extraction method and solvent technology, which is applied in the technical field of separating copper in nickel-cobalt-copper system by solvent extraction method, can solve the problems of low direct yield, high added value, high production cost, etc., achieve high copper recovery rate, reduce burden, Realize the effect of purification and separation
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Embodiment 1
[0015] In the nickel-cobalt-copper liquid, the content of each component before copper removal is shown in Table 1-1.
[0016] Table 1-1 Composition in nickel-cobalt-copper system before copper removal (g / l)
[0017] co 2+ Ni 2+ Cu 2+ Fe 2+ Mg 2+ Ca 2+ mn 2+ NH 4+ 35.5 55.6 14.8 3.65 3.68 3.12 1.02 0.5
[0018] In N902-sulfonated kerosene, the volume percentage of N902 is 30%, and the volume percentage of sulfonated kerosene is 70%.
[0019] In a small-scale mixed extraction and clarification tank, N902-sulfonated kerosene and nickel-cobalt-copper feed liquid are mixed at a volume ratio of 4:1, and the pH of the feed liquid is adjusted to 2.5 with sodium carbonate, and 4-stage extraction is carried out at room temperature; each stage of extraction The mixing time was 4 minutes. After clarification and phase separation of the raffinate, 4 mol / L sulfuric acid was used as the stripping agent for the copper-loaded organic phase, and...
Embodiment 4
[0043] In the nickel-cobalt-copper liquid, the content of each component before copper removal is shown in Table 4-1.
[0044] Table 4-1 Composition of pre-copper solution (g / l)
[0045] co 2+ Ni 2+ Cu 2+ Fe 2+ Mg 2+ Ca 2+ mn 2+ NH 4+ 24.75 45.26 12.9 2.89 3.57 2.98 0.87 0.26
[0046] In N902-sulfonated kerosene, the volume percentage of N902 is 28%, and the volume percentage of sulfonated kerosene is 72%.
[0047] In a small-scale mixed extraction and clarification tank, N902-sulfonated kerosene and nickel-cobalt-copper feed liquid were mixed at a volume ratio of 3.9:1, and the pH of the feed liquid was adjusted to 2.5 with sodium carbonate, and 4 stages of extraction were carried out at room temperature; each stage of extraction 3 minutes. After clarification and phase separation of the raffinate, 4 mol / L sulfuric acid was used as the stripping acid for the copper-loaded organic phase, and the volume ratio of the organic phase...
Embodiment 5
[0052] In the nickel-cobalt-copper liquid, the content of each component before copper removal is shown in Table 5-1.
[0053] Table 5-1 Composition of pre-copper solution (g / l)
[0054] co 2+ Ni 2+ Cu 2+ Fe 2+ Mg 2+ Ca 2+ mn 2+ NH 4+ 28.4 50.1 3.2 2.56 1.75 1.20 1.07 0.20
[0055]In N902-sulfonated kerosene, the volume percentage of N902 is 20%, and the volume percentage of sulfonated kerosene is 80%. In a small-scale mixed extraction and clarification tank, N902-sulfonated kerosene and nickel-cobalt-copper feed liquid are mixed at a volume ratio of 3:1, and the pH of the feed liquid is adjusted to 2.5 with sodium carbonate, and 3-stage extraction is carried out at room temperature; each stage of extraction 3 minutes. After clarification and phase separation of the raffinate, 3.9 mol / L sulfuric acid was used as the stripping acid for the copper-loaded organic phase, and the volume ratio of the organic phase to the stripping aci...
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