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| Recovery of Nickel and Cobalt from Precipitation of Pyrolusite Leaching Process |
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Received:February 09, 2012
Revised:February 09, 2012
Accepted:February 13, 2012
Published Online:August 20, 2012
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| DOI：doi：10.3969/j.issn.1007-7545.2012.09.001 |
| KeyWord:nickel; cobalt; dimethyldithiocarbamate; oxidative leaching; recovery |
| Author | Institution |
| Li Bo-ji |
广西大学化学化工学院 |
| Su Hai-feng |
广西大学化学化工学院 |
| Wen Yan-xuan |
广西大学化学化工学院 |
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| Abstract: |
| Dimethyldithiocarbamate precipitation, formed by the addition of sodium dimethyldithiocarbamate to purify the neutralized filtrate of pyrolusite reductive leaching process, was used as raw materials to extract nickel and cobalt with sodium nitrate as oxidant in dilute sulfuric acid medium. The effects of dosage of sodium nitrate, concentration of sulfuric acid, leaching temperature, and reaction time on extraction of nickel and cobalt were investigated. The results show that the leaching rate is 96% for cobalt and 94% for nickel, respectively, under the optimal conditions including H2SO4 concentration of 1.84 mol/L, NaNO3 dosage of 35.0 g/L, and 3 h at 50 ℃. |
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