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| EXPERIMENTAL STUDY ON CADMIUM REMOVAL FROM NICKEL COBALT SULFATE SOLUTION BY EXTRACTION |
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Received:February 12, 2020
Revised:February 18, 2020
Accepted:February 19, 2020
Published Online:January 29, 2021
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| DOI： |
| KeyWord:Cadmium; nickel cobalt sulfate; extraction |
| Author | Institution |
| LIU Hong Fei |
National Engineering Technology Research Center of Scattered Metals,First Rare Materials CO.,Ltd. |
| YIN Liang |
National Engineering Technology Research Center of Scattered Metals,First Rare Materials CO.,Ltd. |
| ZHU Liu |
National Engineering Technology Research Center of Scattered Metals,First Rare Materials CO.,Ltd. |
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| Abstract: |
| Cadmium was removed from nickel cobalt sulfate solution by extraction was studied. In the experiment, the oil phase of 10% N235 + 5% TBP + 85% kerosene was used as the extraction agent, dilute sulfuric acid was used as the detergent, and the sodium hydroxide solution was used as the stripping agent. The experimental results show that the optimal extraction conditions are: the amount of sodium chloride added is 18 g / L, the oil-water ratio is 1: 2, and the extraction at room temperature for 5 min. under the condition of three-stage countercurrent extraction, the removal rate of cadmium can reach 99.4 %. The best conditions for back extraction are: the concentration of sodium hydroxide solution is 120 g / L, the oil-water ratio is 4: 1, the back extraction is 5 minutes at room temperature, and the back extraction rate reaches 98.0%. The purpose of removing cadmium in the nickel cobalt sulfate solution can be realized. |
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