发明名称 |
METHOD FOR SEPARATING NIKEL AND COBALT FROM ACTIVE MATERIALS CONTAINED IN SPENT NICKEL-HYDROGEN BATTERY |
摘要 |
<p>The present invention provides a method including the following three steps:
(1) A leaching step of mixing a material containing positive and negative electrode active materials with a sulfuric acid solution and dissolving therein, and then separating a leachate from a residue;
(2) A rare earth crystallization step of adding an alkali metal sulfate to the leachate to obtain a mixed precipitate of double sulfate of rare earth elements, and a rare-earth-element-free solution; and
(3) A sulfide raw material recovery step of adding a sulfurizing agent to the rare-earth-element-free solution to separate a nickel and cobalt sulfide raw material and a residual solution,
wherein a sulfide containing nickel and cobalt and a sulfate containing rare earth elements are obtained, whereby nickel, cobalt and rare earth elements are separated from a material containing positive and negative electrode active materials which constitutes a nickel-metal hydride battery.</p> |
申请公布号 |
EP2597164(A1) |
申请公布日期 |
2013.05.29 |
申请号 |
EP20100855042 |
申请日期 |
2010.11.16 |
申请人 |
SUMITOMO METAL MINING CO., LTD. |
发明人 |
KIKUTA NAOKO;ASANO SATOSHI;TAKANO MASATOSHI |
分类号 |
C22B7/00;C22B23/00;C22B23/06;C22B59/00;H01M10/54 |
主分类号 |
C22B7/00 |
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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