PURIFICATION OF COBALT ANOLYTE USING THE NOVEL SOLVENT EXTRACTION SYSTEM
来源期刊：Acta Metallurgica Sinica2003年第2期
论文作者：W.Y.Niu W.Y.Xue Y.F.Shen
Key words：solvent extraction; nickel; cobalt; anolyte; naphthenic acid; pyridine-ester;
Abstract: In present research, a novel extractant system (D2EHPA + naphthenic acid +pyridine-ester) was used to purify cobalt anolyte and a simulated industrial produc-tion were carried out. This novel extraction system can extract Cu and/or Ni againstCo from chloride medium solutions at pH range of 2.5-4.5. About 2g/l nickel and0.2g/l copper were removed from the cobalt chloride anolyte containing about 100g/lcobalt and 200g/l chloride ions respectively, the raffinate contains nickel and copperless than 0.03g/l and 0. 0003g/l respectively and can be used to electrolyze high-puritycobalt. About 5.5t cobalt anolyte was purified in the simulation industrial experimentand kilogram quantities of cobalt of 99.98% purity and about 95% recovery have beenproduced.
W.Y.Niu1，W.Y.Xue1，Y.F.Shen2
(1.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110014, China;
2.Jinchuan Non-ferrous Metals Complex, Jinchuan 737100, China)
Abstract:In present research, a novel extractant system (D2EHPA + naphthenic acid +pyridine-ester) was used to purify cobalt anolyte and a simulated industrial produc-tion were carried out. This novel extraction system can extract Cu and/or Ni againstCo from chloride medium solutions at pH range of 2.5-4.5. About 2g/l nickel and0.2g/l copper were removed from the cobalt chloride anolyte containing about 100g/lcobalt and 200g/l chloride ions respectively, the raffinate contains nickel and copperless than 0.03g/l and 0. 0003g/l respectively and can be used to electrolyze high-puritycobalt. About 5.5t cobalt anolyte was purified in the simulation industrial experimentand kilogram quantities of cobalt of 99.98% purity and about 95% recovery have beenproduced.
Key words:solvent extraction; nickel; cobalt; anolyte; naphthenic acid; pyridine-ester;
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