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    AQUEOUS COBALT CHLORIDE SOLUTION PURIFICATION METHOD
    3.
    发明公开
    AQUEOUS COBALT CHLORIDE SOLUTION PURIFICATION METHOD 审中-公开
    水溶性氯化钴溶液净化方法

    公开(公告)号：EP3305923A1

    公开(公告)日：2018-04-11

    申请号：EP16803094.8

    申请日：2016-05-20

    申请人： Sumitomo Metal Mining Co., Ltd.

    发明人： OHARA Hideki ,  ASANO Satoshi ,  TAKANO Masatoshi ,  TAN Toshirou

    IPC分类号： C22B23/06 ,  C01G51/08 ,  C22B3/46 ,  C22B23/00 ,  H01M4/525

    摘要： The present invention provides an aqueous cobalt chloride solution refinement method, in which impurities can be efficiently removed from a cobalt salt solution.
    Disclosed is a method for bringing metallic nickel into contact with an aqueous solution containing cobalt chloride to remove an impurity by a cementation reaction, in which the metallic nickel is washed with an acidic liquid having a pH of not more than 2.5 before the metallic nickel is brought into contact with the aqueous solution containing cobalt chloride. Since the metallic nickel is washed with the acidic liquid having a pH of not more than 2.5, a passive film on a surface of the metallic nickel is removed. The passive film is removed from the metallic nickel, and therefore, when the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, an impurity more noble than the metallic nickel can be precipitated by the cementation reaction. In addition, since the metallic nickel is only washed with acid to be brought into contact with the aqueous solution containing cobalt chloride, the impurity can be easily removed from the aqueous solution containing cobalt chloride.

    摘要翻译： 本发明提供了一种氯化钴水溶液精制方法，其中可以从钴盐溶液中有效地除去杂质。 公开了使金属镍与含有氯化钴的水溶液接触以通过胶结反应去除杂质的方法，其中金属镍用pH值不超过2.5的酸性液体洗涤，然后金属镍是 与含有氯化钴的水溶液接触。 由于用pH值不超过2.5的酸性液体洗涤金属镍，所以金属镍表面上的钝化膜被去除。 从金属镍中除去钝态膜，因此，当金属镍与含有氯化钴的水溶液接触时，通过胶结反应可以沉淀比金属镍更贵重的杂质。 另外，由于金属镍仅用酸洗涤而与含有氯化钴的水溶液接触，所以可以容易地从含有氯化钴的水溶液中除去杂质。

    METHOD FOR TREATING LITHIUM ION BATTERY WASTE
    5.
    发明公开
    METHOD FOR TREATING LITHIUM ION BATTERY WASTE 审中-公开

    公开(公告)号：EP3715484A1

    公开(公告)日：2020-09-30

    申请号：EP18880919.8

    申请日：2018-10-22

    申请人： Sumitomo Metal Mining Co., Ltd.

    发明人： TAKENOUCHI Hiroshi ,  ASANO Satoshi ,  TAN Toshirou ,  KOBAYASHI Hiroshi ,  TAKEDA Kenji

    IPC分类号： C22B7/00 ,  C22B15/00 ,  C22B23/00 ,  C25C1/12

    摘要： Provided is a treatment method whereby it becomes possible to recovery copper, nickel and cobalt, which are valuable metals, contained in a lithium ion battery waste and to separate copper, nickel and cobalt from one another effectively. A method for treating a lithium ion battery waste according to the present invention includes: an alloy production step S1 of introducing the lithium ion battery waste into a furnace and then melting the lithium ion battery waste by heating, thereby producing an alloy containing copper, nickel and cobalt; and an electrolytic purification step S2 of subjecting the alloy to such an electrolytic treatment that the alloy is charged as an anode into a sulfuric acid solution and then electricity is conducted between the anode and a cathode to electrodeposit copper contained in the alloy onto the cathode, thereby separating nickel and cobalt from each other.

    METHOD FOR PRODUCING SOLUTIONS CONTAINING NICKEL OR COBALT
    6.
    发明公开
    METHOD FOR PRODUCING SOLUTIONS CONTAINING NICKEL OR COBALT 审中-公开

    公开(公告)号：EP3508453A1

    公开(公告)日：2019-07-10

    申请号：EP17846706.4

    申请日：2017-09-01

    申请人： Sumitomo Metal Mining Co., Ltd.

    发明人： OHARA Hideki ,  TAN Toshirou ,  TAKANO Masatoshi ,  ASANO Satoshi ,  KOBAYASHI Hiroshi

    IPC分类号： C01G53/10 ,  C01G51/10 ,  C22B3/38

    摘要： Provided is a method for producing solutions, by which two solutions, namely a high-purity nickel sulfate solution and a mixed solution of nickel sulfate and cobalt sulfate are able to be obtained at the same time from a sulfuric acid solution containing nickel, cobalt and calcium. A method for producing solutions according to the present invention uses a sulfuric acid solution containing nickel, cobalt and calcium and performs a first step S1 for producing a mixed solution of nickel sulfate and cobalt sulfate from the sulfuric acid solution and a second step S2 for producing a solution of nickel sulfate from the sulfuric acid solution in parallel. In the first step, the sulfuric acid solution is subjected to solvent extraction by means of an extractant, thereby obtaining a first organic solvent after extraction containing calcium and a first extraction residue containing nickel and cobalt. In the second step, the sulfuric acid solution is subjected to solvent extraction by means of an extractant, thereby obtaining a second organic solvent after extraction containing cobalt and calcium and a second extraction residue containing nickel.