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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
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hidemasa Nagai , Keiji Kudo , Itsumi Matsuoka , Yoshitomo Ozaki , Hirofumi Shoji , Shin-ya Matsumoto , Tatsuya Higaki
Abstract: 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：US10570482B2
公开(公告)日：2020-02-25
申请号：US16061684
申请日：2016-12-13
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tatsuya Higaki , Hidemasa Nagai , Hiroshi Kobayashi
Abstract: A method for recovering scandium is provided, which is capable of recovering highly-pure scandium from nickel oxide ore in a simple and efficient manner. The method for recovering scandium according to the present invention includes a scandium elution step S2 of passing a solution containing scandium through an ion exchange resin to obtain an eluted liquid containing scandium from the ion exchange resin, a neutralization step S3 of adding for neutralization a neutralizing agent to the eluted liquid, a solvent extraction step S4 of solvent-extracting the neutralized eluted liquid using an amine-based extracting agent, and a scandium recovering step S5 of obtaining a scandium precipitate from residual liquid separated by the solvent extraction, and then roasting the precipitate to obtain scandium oxide.
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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
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tatsuya Higaki , Yoshitomo Ozaki , Shin-ya Matsumoto , Itsumi Matsuoka , Hidemasa Nagai , Toshihiko Nagakura , Keiji Kudo
CPC classification number: C22B59/00 , C22B3/0005 , C22B3/08 , C22B3/42 , C22B3/44 , C22B21/0015 , C22B34/32 , Y02P10/234
Abstract: 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.
Abstract translation: 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：US09255013B2
公开(公告)日：2016-02-09
申请号：US14386172
申请日：2013-01-16
Applicant: Sumitomo Metal Mining Co., Ltd.
Inventor： Hideki Sasaki , Yoshitomo Ozaki , Manabu Enomoto , Hirofumi Shouji , Tatsuya Higaki , Hiroyuki Mitsui , Yasumasa Kan
CPC classification number: C01G49/06 , C01P2004/61 , C22B3/44 , Y02P10/234
Abstract: Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components.
Abstract translation: 提供一种用于制造用于炼铁的赤铁矿的方法，其中可以用作制铁原料的高纯度赤铁矿从通过高压酸浸（HPAL）方法生产的含有氧化铁的浸出残渣中被廉价和有效地回收 。 在将含有铁和贵重金属的矿石中添加无机酸和氧化剂，然后在高压和高温下浸出有价值金属的方法中，用于制造（高纯度）赤铁矿的方法包括：（1）中和步骤， 在高压和高温下获得的浸出液的中和剂以形成浸出浆料;（2）将在中和步骤（1）中获得的浸出浆料分离成浸出残渣和渗滤液的固液分离步骤，和 3）将浸出残渣分类为赤铁矿和ang石成分的分级步骤。
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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
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hidemasa Nagai , Keiji Kudo , Itsumi Matsuoka , Yoshitomo Ozaki , Hirofumi Shoji , Shin-ya Matsumoto , Tatsuya Higaki
Abstract: 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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Patent Agency Ranking
公开(公告)号：US10968112B2
公开(公告)日：2021-04-06
申请号：US16964353
申请日：2019-01-23
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tatsuya Higaki , Hiroshi Kobayashi
Abstract: Provided is a method for obtaining high-purity scandium oxide efficiently from a solution containing scandium. The method for producing high-purity scandium oxide of the present invention has a first firing step S12 for subjecting a solution containing scandium to oxalation treatment using oxalic acid and firing the obtained crystals of scandium oxalate at a temperature of 400 to 600° C., inclusive, a dissolution step S13 for dissolving the scandium compound obtained by firing in one or more solutions selected from hydrochloric acid and nitric acid to obtain a solution, a reprecipitation step S14 for subjecting the solution to oxalation treatment using oxalic acid and generating a reprecipitate of scandium oxalate, and a second firing step S15 for firing the reprecipitate of obtained scandium oxalate to obtain scandium oxide.
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公开(公告)号：US20200232066A1
公开(公告)日：2020-07-23
申请号：US16648480
申请日：2018-09-11
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tatsuya Higaki , Hiroshi Takenouchi , Hiroshi Kobayashi , Satoshi Asano
Abstract: Provided is a method for separating copper, nickel, and cobalt, the method being capable of efficiently and selectively separating copper, nickel, and cobalt from alloys containing copper, nickel, and cobalt, such as highly corrosive alloys containing copper, nickel, and cobalt obtained by dry-processing used lithium ion batteries. The alloy containing copper, nickel, and cobalt is brought into contact with nitric acid in the co-presence of a sulfiding agent to obtain a solid containing copper and a leachate containing nickel and cobalt.
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公开(公告)号：US10196710B1
公开(公告)日：2019-02-05
申请号：US16071920
申请日：2017-01-11
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tatsuya Higaki , Shin-ya Matsumoto , Hidemasa Nagai , Hiroshi Kobayashi
Abstract: The method for recovering scandium pertaining to the present invention has: a first neutralization step for passing a solution containing scandium over an ion exchange resin, adding a neutralizing agent to the eluent eluted from the ion exchange resin and performing a neutralization treatment, and obtaining a primary neutralized sediment and a primary neutralized filtrate by solid-liquid separation; a second neutralization step for further adding a neutralizing agent to the primary neutralized filtrate and performing a neutralization treatment, and obtaining a secondary neutralized sediment and a secondary neutralized filtrate by solid-liquid separation; a hydroxide dissolution step for adding acid to the secondary neutralized sediment and obtaining a hydroxide solution; a solvent extraction step for subjecting the hydroxide solution to solvent extraction; and a scandium recovery step for recovering scandium oxide from a raffinate separated in the solvent extraction step.
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公开(公告)号：US10190189B2
公开(公告)日：2019-01-29
申请号：US15118250
申请日：2015-02-18
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Toshihiko Nagakura , Yoshitomo Ozaki , Hidemasa Nagai , Tatsuya Higaki
Abstract: The purpose of the present invention is to recover roughly purified scandium, which is purified to an extent acceptable for a technique for highly purifying scandium, efficiently and without any complicated operation from a neutralization sediment (drainage sediment) generated in neutralizing acid mine drainage which contains a sulfur component. This scandium recovery process includes a washing step (S1) for washing a neutralization sediment (drainage sediment) and a dissolution step (S2) for subjecting the washed sediment obtained in the washing step (S1) to dissolution in an acid. It is preferable that the process further includes a re-dissolution step (S3) for subjecting a dissolution residue which remains after the dissolution in the dissolution step (S2) to dissolution with an acid. In the washing step (S1), the neutralization sediment is washed with a washing liquid until the pH of the post-washing liquid generated in the washing step becomes 6 or higher.
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公开(公告)号：US10156002B2
公开(公告)日：2018-12-18
申请号：US15546038
申请日：2015-12-08
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Ryoma Yamaguma , Tatsuya Higaki , Hidemasa Nagai , Satoshi Asano , Hiroshi Kobayashi
Abstract: Provided is a method for recovering scandium with which scandium can be efficiently recovered as high purity scandium oxide from a scandium-containing solution containing impurities such as iron without causing problems such as increased cost and safety problems. According to the method for recovering scandium according to the present invention, the pH of a solution containing scandium and iron (scandium-containing solution) is adjusted within the range of not less than −0.5 and less than 1, then scandium oxalate is obtained by adding the pH adjusted solution to an oxalic acid solution, and the scandium oxalate is roasted into scandium oxide.
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