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公开(公告)号：US20230071697A1
公开(公告)日：2023-03-09
申请号：US17797212
申请日：2021-02-10
发明人： Hiroshi Takenouchi , Satoshi Asano , Shin-ichi Heguri , Hirofumi Shouji , Keiji Kudou , Itsumi Matsuoka , Shota Sanjo , Takumi Matsugi
摘要： Provided is a method for treating an alloy by which nickel and/or cobalt can be selectively isolated from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium ion battery. The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper as well as nickel and/or cobalt, the method including: a leaching step in which a leachate is obtained by subjecting an alloy to an acid-based leaching treatment under conditions in which a sulfurizing agent is also present; a reduction step in which a reduced solution is obtained by subjecting the leachate to a reduction treatment using a reducing agent; and an oxidation/neutralization step in which a solution that contains nickel and/or cobalt is obtained by adding an oxidizing agent and also a neutralizing agent to the reduced solution.
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公开(公告)号：US20220154308A1
公开(公告)日：2022-05-19
申请号：US17437588
申请日：2020-03-16
发明人： Hideki Ohara , Shota Sanjo , Masatoshi Takano , Satoshi Asano , Hiroshi Kobayashi , Yusuke Senba , Hiroto Watanabe
摘要： A method of manufacturing a cobalt-nickel-containing solution including: preparing a crude nickel hydroxide and/or a crude cobalt hydroxide as a starting material, the crude nickel or cobalt hydroxide containing cobalt and nickel and elements except the cobalt and nickel as impurities, the crude nickel hydroxide containing the nickel more than the cobalt, and the crude cobalt hydroxide containing the cobalt more than the nickel; a water-washing process for obtaining a post-water-washing crude hydroxide from the starting material; a leaching process for obtaining a post-leaching solution from the post-water-washing crude hydroxide; a neutralization process of subjecting the post-leaching solution to neutralization and solid-liquid-separation to remove the impurities as a post-neutralization residue containing one or more of iron, silicon, aluminum, and chromium, thereby obtaining a post-neutralization solution; and an extraction process of subjecting the post-neutralization solution to solvent extraction to obtain a post-extraction solution containing cobalt and nickel with the impurities reduced.
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公开(公告)号：US20240318282A1
公开(公告)日：2024-09-26
申请号：US18579520
申请日：2022-07-14
发明人： Hiroshi Takenouchi , Shin-ichi Heguri , Satoshi Asano , Hirofumi Shouji , Itsumi Matsuoka , Shota Sanjo , Takumi Matsugi
CPC分类号： C22B23/043 , C22B3/22 , C22B3/44 , C22B7/007 , C22B23/0461 , H01M10/54
摘要： The present invention provides a method that is capable of selectively obtaining nickel and/or cobalt from an alloy, which contains copper. A method comprises: a leaching step S1 in which an alloy that contains copper as well as nickel and/or cobalt is subjected to a leaching treatment by means of an acid solution in the coexistence of a sulfurizing agent, thereby obtaining a leachate and a leaching residue; and a reduction step S2 in which a reducing agent is added to the thus-obtained leachate so as to reduce the leachate, thereby obtaining a post-reduction solution and a reduction residue. This method is characterized in that the reduction is carried out in the reduction step S2, while controlling the addition amount of the reducing agent so that the redox potential of the leachate is 0 mV or less as determined where a silver/silver chloride electrode is the reference electrode.
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公开(公告)号：US20230167526A1
公开(公告)日：2023-06-01
申请号：US17912998
申请日：2021-03-11
发明人： Keiji Kudou , Satoshi Asano , Shin-ichi Heguri , Hiroshi Takenouchi , Hirofumi Shouji , Itsumi Matsuoka , Shota Sanjo , Takumi Matsugi
摘要： An alloy treatment method is provided, in which a solution containing nickel and/or cobalt is obtained from an alloy containing nickel and/or cobalt and also containing copper and zinc, the method comprising: a leaching step for subjecting the alloy to a leaching treatment with an acid under the condition where a sulfating agent is present to produce a leachate; a reduction step for subjecting the leachate to a reduction treatment using a reducing agent to produce a reduced solution; an oxidation/neutralization step for adding an oxidizing agent and a neutralizing agent to the reduced solution to produce a neutralized solution containing nickel and/or cobalt and also containing zinc; and a solvent extraction step for subjecting the neutralized solution to a solvent extraction procedure using an acidic phosphorus compound-based extractant to produce a solution containing nickel and/or cobalt.
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公开(公告)号：US20230160035A1
公开(公告)日：2023-05-25
申请号：US17912977
申请日：2021-03-11
发明人： Keiji Kudou , Satoshi Asano , Shin-ichi Heguri , Hiroshi Takenouchi , Hirofumi Shouji , Itsumi Matsuoka , Shota Sanjo , Takumi Matsugi
CPC分类号： C22B23/043 , H01M10/54 , C22B7/007 , C22B1/005
摘要： The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper, zinc, and nickel and/or cobalt, said method comprising: a leaching process wherein a leachate is obtained by subjecting the alloy to a leaching treatment by means of an acid in the coexistence of a sulfurizing agent; a reduction process wherein the leachate is subjected to a reduction treatment with use of a reducing agent; and an ion exchanging process wherein a solution that contains nickel and/or cobalt is obtained by bringing a solution, which has been obtained in the reduction process, into contact with an amino phosphoric acid-based chelate resin, thereby having zinc adsorbed on the amino phosphoric acid-based chelate resin.
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