发明名称 |
METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE |
摘要 |
The purpose of the present invention is to provide a method for producing a high-purity nickel sulfate with less impurities, especially with less magnesium or less chlorides by regulating the concentration of the extractant and the pH concentration during the processing in a step for obtaining a nickel sulfate solution with high nickel concentration by means of solvent extraction using an acidic organic extractant. A method for producing a high-purity nickel sulfate, which is characterized by processing an acidic solution containing nickel through at least the following steps: a sulfurization step wherein a sulfurizing agent is added into the acidic solution containing nickel, thereby obtaining a sediment of a nickel sulfide and a liquid after sulfurization; a redissolving step wherein a slurry of the nickel sulfide obtained in the sulfurization step is prepared and an oxidant is added into the slurry, thereby obtaining a concentrated solution of nickel; a liquid cleaning step wherein the concentrated solution of nickel obtained in the redissolving step is neutralized by adding a neutralizing agent thereto, thereby obtaining a neutralization sediment and a concentrated solution of nickel after deironization; and a solvent extraction step wherein the concentrated solution of nickel after deironization obtained in the liquid cleaning step is subjected to solvent extraction, thereby obtaining a back extraction liquid and a nickel sulfate solution. |
申请公布号 |
CA2856341(A1) |
申请公布日期 |
2013.05.30 |
申请号 |
CA20122856341 |
申请日期 |
2012.11.19 |
申请人 |
SUMITOMO METAL MINING CO., LTD. |
发明人 |
NAKAI, TAKAYUKI;HIGAKI, TATSUYA;OZAKI, YOSHITOMO |
分类号 |
C22B23/00;C01G53/10;C22B3/26;C22B3/44;C22B7/00;H01M10/54 |
主分类号 |
C22B23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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