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Efficient method for selective separation of copper from ammonia-ammonium salt solution of copper, cobalt and nickel

A technology of ammonium salt solution and solution, which is applied in the field of copper hydrometallurgy to achieve the effect of high extraction efficiency and strong selectivity

Inactive Publication Date: 2015-09-23
YUNNAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the defect that the current copper extractant cannot realize the selective extraction of copper from the ammonia-ammonium salt solution and the directional separation of cobalt and nickel during the extraction process, the purpose of the present invention is to propose a A method for directional extraction and separation of copper from the ammonia-ammonium salt solution containing copper, cobalt and nickel by adding an anti-synergist, thereby realizing the efficient selective separation of copper from the ammonia-ammonium salt solution containing copper, cobalt and nickel

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  • Efficient method for selective separation of copper from ammonia-ammonium salt solution of copper, cobalt and nickel

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example 1

[0027] NH containing copper 3.0 g / L, nickel 3.0 g / L, cobalt 0.7 g / L 4 OH-NH 4 50 ml of Cl solution was used as the aqueous phase to be extracted, in which NH 4 OH is 4.0 mol / L, NH 4Cl is 1.0 mol / L and pH is 9.66. Prepare the organic phase, wherein the total volume of the organic phase is 50 ml, the concentration of hydroxime extractant N902 in the organic phase is 10% by volume, and adding 1% alkylphosphine oxide (code name TRPO) by volume, and the rest is diluent Sulfonated kerosene. Add the organic phase to the water phase, mechanically vibrate for 5 minutes and let it stand for stratification. After phase separation, use Hitachi Z2000 atomic absorption to measure the concentration of copper, cobalt and nickel in the raffinate water phase. Find out by subtraction. The calculated extraction rate of copper is 99.86%, the extraction rate of nickel is 15.07%, and the extraction rate of cobalt is 1.55%. The nickel separation factor is 4020, and the copper-cobalt separation ...

example 2

[0029] Prepare NH containing 3.0 g / L copper, 3.0 g / L nickel and 0.7 g / L cobalt 4 OH-NH 4 50 ml of Cl solution was used as the aqueous phase to be extracted, in which NH 4 OH is 3.75 mol / L, NH 4 Cl is 1.0 mol / L and pH is 9.45. Prepare the organic phase, wherein the total volume of the organic phase is 50 ml, the concentration of hydroxime extractant M5640 in the organic phase is 15% by volume, and 2% diisooctyl sulfoxide (code name BESO) is added to the volume ratio, and the rest Sulfonated kerosene as diluent. Add the organic phase to the water phase, mechanically vibrate for 5 minutes and let it stand for stratification. After phase separation, use Hitachi Z2000 atomic absorption to measure the concentration of copper, cobalt and nickel in the raffinate water phase. Find out by subtraction. The calculated extraction rate of copper is 99.94%, the extraction rate of nickel is 6.51%, and the extraction rate of cobalt is 1.45%. The nickel separation coefficient is 23921, an...

example 3

[0031] Prepare copper 4.5 g / L, nickel 3.6 g / L, cobalt 1.2 g / L NH 4 OH-NH 4 50ml of Cl solution is used as the aqueous phase to be extracted, in which NH 4 OH is 3.25 mol / L, NH 4 Cl is 1.0 mol / L, and the pH value is 9.35. Prepare the organic phase, wherein the total volume of the organic phase is 25ml, the concentration of the hydroxime extractant N902 in the organic phase is 10% by volume, and to add tributyl phosphate (code name TBP) with a volume ratio of 1%, the rest is diluent sulfur kerosene. Add the organic phase to the water phase, mechanically vibrate for 5 minutes and let it stand for stratification. After phase separation, use Hitachi Z2000 atomic absorption to measure the concentration of copper, cobalt and nickel in the raffinate water phase. Find out by subtraction. The calculated extraction rate of copper is 92.86%, the extraction rate of nickel is 10.06%, and the extraction rate of cobalt is 4.03%. The loaded organic phase is back-extracted cobalt with the...

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Abstract

An efficient method for the selective separation of copper from an ammonia-ammonium salt solution of copper, cobalt and nickel, and belongs to the field of hydrometallurgy, particularly an efficient directional separation process of copper from cobalt and nickel. The method uses alkaline ammonia-ammonium salt solution containing ammonia coordinated copper, cobalt and nickel as a solution to be extracted, and the pH value is 8.0 to 13.0. The alkylphosphine oxide or phosphate or sulfoxide compounds as an anti-synergist agent is added to an organic phase containing hydroxamic copper extractant N902 or M5640, so as to overcome the defect that the extractant can not achieve selective separation extraction of copper from ammonia-ammonium salt solution, and to achieve directional separation of copper from cobalt and nickel in the extraction process. The invention method is simple; the organic phase added with the anti-synergist agent has high extraction efficiency of copper; and the method realizes good separation effect of copper from cobalt and nickel.

Description

technical field [0001] The invention belongs to copper hydrometallurgical technology, in particular to a method for selectively separating copper from an ammonia-ammonium salt solution containing copper, cobalt and nickel. Background technique [0002] With the continuous increase of the demand for copper metal, the copper ore resources that are easy to handle are decreasing year by year, and the development and utilization of low-grade, difficult-to-handle copper ore resources has become particularly important. Acid leaching is the main means of wet treatment of low-grade copper oxide ore, but when the ore contains alkaline gangue such as calcium magnesium carbonate, the acid leaching method has a large amount of acid, high production costs, and the formation of acid leaching. a lot of CaSO 4 It is easy to harden the ore particles, which is not conducive to the penetration of the solution. The ammonia leaching process has the advantages of good leaching selectivity, no co...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B23/00C22B3/26
CPCY02P10/20
Inventor 杨项军杨瑞四史德强王世雄郭洪
Owner YUNNAN UNIV
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