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公开(公告)号：US11214849B2
公开(公告)日：2022-01-04
申请号：US16077821
申请日：2017-02-21
发明人： Hidemasa Nagai , Keiji Kudo , Itsumi Matsuoka , Yoshitomo Ozaki , Hirofumi Shoji , Shin-ya Matsumoto , Tatsuya Higaki
摘要： A method for recovering scandium, by which scandium is able to be recovered from nickel oxide ore. The present invention comprises: a leaching step S1 for obtaining a leachate by leaching a nickel oxide ore containing scandium with use of sulfuric acid; a neutralization step by adding a neutralizing agent thereto; a sulfurization step by adding a sulfurizing agent to the post-neutralization solution; an ion exchange step by bringing the post-sulfurization solution into contact with a chelating resin; a dissolution step by obtaining a precipitate of scandium hydroxide by adding an alkali into the scandium eluent, and subsequently adding an acid solution to the scandium hydroxide; a solvent extraction step by bringing the scandium acid dissolution liquid into contact with a neutral extractant; and a scandium recovery step by adding oxalic acid to the extraction residue and subsequently roasting the salt of scandium oxalate.
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公开(公告)号：US20210254193A1
公开(公告)日：2021-08-19
申请号：US16077821
申请日：2017-02-21
发明人： Hidemasa Nagai , Keiji Kudo , Itsumi Matsuoka , Yoshitomo Ozaki , Hirofumi Shoji , Shin-ya Matsumoto , Tatsuya Higaki
摘要： A method for recovering scandium, by which scandium is able to be recovered from nickel oxide ore. The present invention comprises: a leaching step S1 for obtaining a leachate by leaching a nickel oxide ore containing scandium with use of sulfuric acid; a neutralization step by adding a neutralizing agent thereto; a sulfurization step by adding a sulfurizing agent to the post-neutralization solution; an ion exchange step by bringing the post-sulfurization solution into contact with a chelating resin; a dissolution step by obtaining a precipitate of scandium hydroxide by adding an alkali into the scandium eluent, and subsequently adding an acid solution to the scandium hydroxide; a solvent extraction step by bringing the scandium acid dissolution liquid into contact with a neutral extractant; and a scandium recovery step by adding oxalic acid to the extraction residue and subsequently roasting the salt of scandium oxalate.
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公开(公告)号：US20160340757A1
公开(公告)日：2016-11-24
申请号：US15115030
申请日：2015-01-21
发明人： Tatsuya Higaki , Yoshitomo Ozaki , Shin-ya Matsumoto , Itsumi Matsuoka , Hidemasa Nagai , Toshihiko Nagakura , Keiji Kudo
CPC分类号： C22B59/00 , C22B3/0005 , C22B3/08 , C22B3/42 , C22B3/44 , C22B21/0015 , C22B34/32 , Y02P10/234
摘要： In order to recover high-quality scandium from nickel oxide ores efficiently, this method comprises: a step (S1) for feeding Ni oxide ores and sulfuric acid into a pressure vessel, and subjecting the mixture to solid-liquid separation to form a leachate and a leach residue; a step (S2) for adding a neutralizing agent to the leachate, and thus forming a neutralization sediment and a post-neutralization fluid; a step (S3) for adding a sulfurizing agent to the post-neutralization fluid, and separating the obtained mixture into Ni sulfide and a post-sulfurization fluid; a step (S4) for bringing the post-sulfurization fluid into contact with a chelating resin, making Sc adsorbed on the chelating resin, and forming an Sc eluent; a step (S6) for bringing the Sc eluent into contact with an extracting agent, adding a back-extraction agent to the extract, and forming back-extracted matter; and a step (S8) for roasting the back-extracted matter, and forming Sc oxide.
摘要翻译： 为了有效地从氧化镍矿石中回收高质量的钪，该方法包括：将氧化镍矿石和硫酸进料到压力容器中的步骤（S1），并将混合物进行固液分离以形成渗滤液， 浸出渣 将中和剂添加到浸出液中的步骤（S2），从而形成中和沉淀物和后中和液; 步骤（S3），用于将硫化剂添加到后中和流体中，并将得到的混合物分离成硫化镍和硫化后的流体; 使后硫化流体与螯合树脂接触的步骤（S4），使Sc吸附在螯合树脂上，形成Sc洗脱液; 用于使Sc洗脱液与萃取剂接触的步骤（S6），向提取物中加入反萃取剂，形成反萃取物; 以及用于焙烧反萃取物质的步骤（S8），以及形成Sc氧化物。
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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：US10697043B2
公开(公告)日：2020-06-30
申请号：US16082384
申请日：2017-03-01
发明人： Yusuke Senba , Itsumi Matsuoka , Hiroshi Kobayashi
摘要： In separating scandium and thorium from a leachate obtained by adding sulfuric acid to a nickel oxide ore containing scandium and thorium, scandium is recovered from only one system. The method according to the invention comprises: an extraction step S1 for treating a nickel oxide ore containing scandium and thorium with sulfuric acid to give an acidic solution (a feed solution for extraction), and then solvent-extracting the feed solution with the use of a scandium extractant containing an amide derivative to thereby divide the feed solution into an organic extract (a first organic phase) containing scandium and thorium and a liquid extract (a first aqueous phase) containing impurities; and a washing step S2 for adding sulfuric acid to the organic extract (the first organic phase) and thus dividing the same into washed organic matters (a second organic phase) containing thorium and a washed liquid (a second aqueous phase) containing scandium.
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公开(公告)号：US20190185964A1
公开(公告)日：2019-06-20
申请号：US16327359
申请日：2017-08-21
CPC分类号： C22B59/00 , B01D11/04 , C22B3/44 , Y02P10/234
摘要： Provided is a method for efficiently purifying scandium by separating scandium and impurities from an acidic solution which contains scandium and impurities that include iron. A method for purifying scandium according to the present invention subjects an acidic solution, which contains an element component including at least ion, while containing scandium, to solvent extraction by means of a mixed extractant containing a phosphoric acid-based extractant and a neutral extractant, thereby extracting scandium from the acidic solution. It is preferable that the phosphoric acid-based extractant is contained in the mixed extractant at a mixing molar ratio within the range of from 5% to 50% (inclusive). It is also preferable that the pH of the acidic solution is adjusted to a value within the range of from 0.0 to 2.0 (inclusive) before the solvent extraction.
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公开(公告)号：US20190040492A1
公开(公告)日：2019-02-07
申请号：US16073946
申请日：2017-01-31
发明人： Itsumi Matsuoka , Hiroshi Kobayashi , Yusuke Senba
摘要： The present invention provides a method for easy and efficient recovery of high purity scandium from nickel oxide ore, the method comprising: an adsorption step for passing a scandium-containing solution through an ion exchange resin to adsorb scandium on the ion exchange resin; an elution step for eluting scandium from the ion exchange resin to obtain a post-elution solution; an impurity extraction step in which after the elution step, the scandium-containing solution is subjected to a first solvent extraction using an amine-based impurity extractant and is separated into a first aqueous phase containing scandium and into a first organic phase containing impurities; and a scandium extraction step in which the first aqueous phase is subjected to a second solvent extraction using an amide derivative-containing scandium extractant to obtain a second organic phase containing scandium.
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公开(公告)号：US09963762B2
公开(公告)日：2018-05-08
申请号：US15115030
申请日：2015-01-21
发明人： Tatsuya Higaki , Yoshitomo Ozaki , Shin-ya Matsumoto , Itsumi Matsuoka , Hidemasa Nagai , Toshihiko Nagakura , Keiji Kudo
CPC分类号： C22B59/00 , C22B3/0005 , C22B3/08 , C22B3/42 , C22B3/44 , C22B21/0015 , C22B34/32 , Y02P10/234
摘要： In order to recover high-quality scandium from nickel oxide ores efficiently, this method comprises: a step (S1) for feeding Ni oxide ores and sulfuric acid into a pressure vessel, and subjecting the mixture to solid-liquid separation to form a leachate and a leach residue; a step (S2) for adding a neutralizing agent to the leachate, and thus forming a neutralization sediment and a post-neutralization fluid; a step (S3) for adding a sulfurizing agent to the post-neutralization fluid, and separating the obtained mixture into Ni sulfide and a post-sulfurization fluid; a step (S4) for bringing the post-sulfurization fluid into contact with a chelating resin, making Sc adsorbed on the chelating resin, and forming an Sc eluent; a step (S6) for bringing the Sc eluent into contact with an extracting agent, adding a back-extraction agent to the extract, and forming back-extracted matter; and a step (S8) for roasting the back-extracted matter, and forming Sc oxide.
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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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