A kind of acid-base coupling extraction system for extraction and separation of multi-metal solution and its application
A multi-metal extraction technology, applied in the direction of improving process efficiency, can solve problems such as efficient separation of difficult metal ions, achieve the effects of inhibiting coordination ability, improving separation efficiency, and promoting efficient separation
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Embodiment 1
[0028] Zinc-copper solution separation system: the concentration of copper and zinc in the aqueous phase solution is 1.3g / L, the concentration of sodium sulfate is 85g / L, and the pH is 4; the acidic extractant in the organic phase is D2EHPA, and the alkaline extractant is Cyphos IL101 or Aliquat336, the diluent is kerosene, the alkaline extractant is added to the acidic extractant, the total concentration of the extractant is 0.5mol / L, and the relative molar concentration of the acid-base extractant is changed to form the following acid-base coupling extraction system (see Table 1 ). At normal temperature, according to the comparison of A / O=1:1 and the aqueous phase containing zinc and copper, the extraction time is 30min; The extraction rate and separation factor of zinc and copper under the same conditions are shown in Table 1.
[0029] Extraction rate and separation factor of zinc and copper under the same conditions in table 1
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[0032] The results...
Embodiment 2
[0034] Nickel-cobalt solution separation system: the concentration of cobalt and nickel in the aqueous phase solution is 1.2g / L, the concentration of ammonium chloride is 107g / L, and the pH is 8.2. The acidic extractant in the organic phase is Cyanex272, the alkaline extractant is Cyphos IL101, TOA, and the diluent is kerosene, the alkaline extractant is added to the acidic extractant, and the total concentration of the extractant is 0.5mol / L, changing the acid-base The relative molar concentration of the extractant constitutes the following acid-base coupling extraction system (see Table 2). At room temperature, extract the aqueous phase with nickel and cobalt according to the comparison of A / O=1:1, and the extraction time is 30min; The extraction rate and separation factor of nickel and cobalt under the same conditions are shown in Table 2.
[0035] Extraction rate and separation factor of cobalt and nickel under the same conditions in table 2
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Embodiment 3
[0040] Copper-nickel solution separation system: the copper and nickel concentrations in the aqueous phase solution are 1.3g / L and 1.2g / L respectively, the ammonium sulfate concentration is 132g / L, and the pH is 9.5. The weakly acidic extractant in the organic phase is LIX84I, the alkaline extractant is Cyanex923, TEHP, and the diluent is kerosene. The alkaline extractant is added to the weakly acidic extractant. The total concentration of the extractant is 0.1mol / L. The relative molar concentration of alkali extractant constitutes the following acid-base coupling extraction system (see Table 3). At room temperature, extract the aqueous phase with nickel and cobalt according to the comparison of A / O=1:1, and the extraction time is 30min; The extraction rate and separation factor of copper and nickel under the same conditions are shown in Table 3.
[0041] Extraction rate and separation factor of copper and nickel under the same conditions in table 3
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