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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：US10766072B2
公开(公告)日：2020-09-08
申请号：US15770523
申请日：2016-10-25
发明人： Hideki Ohara , Yoshitomo Ozaki , Shin-ichi Heguri , Kazuyuki Takaishi , Osamu Ikeda , Tomoaki Yoneyama , Yohei Kudo
摘要： Provided is a method for producing high density nickel powder particularly having a median diameter of 100 to 160 μm by controlling a particle size of nickel powder. The method includes: performing an initial operation by charging a pressure vessel equipped with a stirrer with a nickel ammine complex solution containing nickel in the concentration of 5 to 75 g/L together with seed crystals in the amount of 5 to 200 g per liter of the solution, increasing the temperature of the solution, and performing a reduction reaction with hydrogen by blowing hydrogen gas into the pressure vessel, thereby obtaining the nickel contained in the nickel ammine complex solution as nickel powder; and thereafter, performing a specified operation A repeatedly at least once to obtain the nickel powder having the median diameter of 100 to 160 μm and a bulk density of 1 to 4.5 g/cm3.
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公开(公告)号：US10227675B2
公开(公告)日：2019-03-12
申请号：US15552307
申请日：2015-12-08
摘要： A wet smelting method for nickel oxide ores from which nickel, cobalt, etc. are recovered is provided with which it is possible to reduce the consumption of an acid in leaching, such as sulfuric acid, and to recover valuable metals. The method comprises: step (A) in which nickel oxide ores as a raw material are separated into a limonite-type ore having a low magnesium content and a saprolite-type ore having a high magnesium content; step (B) in which the saprolite-type ore is subjected to normal-pressure leaching under given standardized leaching conditions using the pressure leachate obtained by pressure leaching in step (C); and step (C) in which the limonite-type ore obtained in step (A) is mixed with the normal-pressure leaching residue obtained in step (B) and the mixture is reacted with sulfuric acid in an acidic atmosphere having a high temperature and a high pressure, thereby conducting pressure leaching.
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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
摘要： 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：US10118224B2
公开(公告)日：2018-11-06
申请号：US15114218
申请日：2015-01-27
发明人： Kazumichi Yanagisawa , Junhao Zhang , Shin-ichi Heguri , Hideki Ohara , Osamu Ikeda , Tomoaki Yoneyama , Yohei Kudo , Yoshitomo Ozaki
摘要： Provided is a method for producing nickel powder from a nickel ammine sulfate complex solution, comprising treatment steps of: (1) a seed crystal production step of producing nickel powder having an average particle size of 0.1 to 5 μm; (2) a seed crystal addition step of adding the nickel powder obtained in the step (1) as seed crystals to form a mixed slurry; (3) a reduction step of forming a reduced slurry containing nickel powder formed by precipitation of a nickel component in the mixed slurry on the seed crystals; and (4) a growth step of performing solid-liquid separation to separate and recover the nickel powder as a solid phase component and then blowing hydrogen gas into a solution prepared by adding the nickel ammine sulfate complex solution to the recovered nickel powder to grow the nickel powder to form high purity nickel powder.
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公开(公告)号：US09702023B2
公开(公告)日：2017-07-11
申请号：US14387571
申请日：2013-02-13
发明人： Atsushi Idegami , Yoshitomo Ozaki , Shin-ichi Heguri , Keiji Kudou , Hideki Ohara , Shinya Matsumoto
CPC分类号： C22B23/0469 , C01G53/10 , C01P2006/80 , C22B23/0461
摘要： Provided is a method of producing high-purity nickel sulfate by an impurity-element removal method for selectively removing Mg from a Ni-containing solution. The method comprises a production process of producing nickel sulfate from a Ni-containing acid solution, the acid solution being treated in order of steps (1) to (3): (1) carbonation step, adding a carbonating agent into the Ni-containing solution to make Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture of nickel carbonate and nickel hydroxide, thereby forming a slurry after carbonation including the precipitate and a solution after carbonation; (2) solid-liquid separation step, separating the slurry after carbonation formed in the carbonation step into the precipitate and the solution after carbonation; and (3) neutralization step, adding a neutralizing agent into the solution after carbonation separated through the solid-liquid separation step to recover Ni contained in the solution after carbonation as a Ni-precipitate.
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7.发明授权Method for producing high-purity nickel sulfate and method for removing impurity element from solution containing nickel 有权用于生产高纯度硫酸镍的方法和从含有镍的溶液中除去杂质元素的方法公开(公告)号：US09567239B2
公开(公告)日：2017-02-14
申请号：US14653077
申请日：2014-01-20
发明人： Shin-ichi Heguri , Yoshitomo Ozaki , Keiji Kudo
CPC分类号： C01G53/10 , C01G53/06 , C01P2006/80 , C22B23/0407 , C22B23/0461
摘要： Provided are an impurity-element removing method for selectively removing magnesium from a nickel-containing solution, and a method for producing high-purity nickel sulfate using the impurity-element removing method. The production method includes a production process in the production method of producing high-purity nickel sulfate from a nickel-containing solution, and the nickel-containing solution in the production process is subjected to an impurity-element removal treatment that includes: a hydroxylation step of adding an alkali hydroxide to the nickel-containing solution in the production process to form a hydroxylated slurry; a carbonation step of adding an alkali carbonate to the hydroxylated slurry to form a carbonated slurry, and recovering nickel component from the solution; a solid-liquid separation step for the slurry thus obtained; and a neutralization step of subjecting a solution after reaction obtained by solid-liquid separation to a neutralization, and recovering an impurity element included in the nickel-containing solution in the production process.
摘要翻译： 提供一种用于从含镍溶液中选择性除去镁的杂质元素去除方法，以及使用杂质元素去除方法生产高纯度硫酸镍的方法。 该制造方法包括从含镍溶液制造高纯度硫酸镍的制造方法中的制造方法，对制造方法中的含镍溶液进行杂质元素除去处理，其包括：羟基化工序 在生产过程中向含镍溶液中加入碱性氢氧化物以形成羟基化浆料; 碳酸化步骤，将碱金属碳酸盐添加到羟化浆料中以形成碳酸化浆料，并从溶液中回收镍组分; 由此获得的浆料的固液分离步骤; 以及在通过固液分离得到的反应后的溶液进行中和的中和工序，在制造工序中回收含有镍的溶液中的杂质元素。
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公开(公告)号：US20160368059A1
公开(公告)日：2016-12-22
申请号：US15117823
申请日：2015-02-17
发明人： Kazumichi Yanagisawa , Junhao Zhang , Shin-ichi Heguri , Yoshitomo Ozaki , Kazuyuki Takaishi , Hideki Ohara , Tomoaki Yoneyama , Osamu Ikeda , Yohei Kudo
IPC分类号： B22F9/24
CPC分类号： B22F9/24 , B22F9/26 , B22F2009/245 , B22F2301/15 , B22F2998/10 , B22F2999/00 , B22F2201/013
摘要： Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially comprises: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.
摘要翻译： 本发明提供一种从含有硫酸镍络合物的溶液中制造用于生产镍粉的合适晶种的细镍粉的方法。 依次制备镍粉的方法包括：向含有硫酸镍络合物的溶液中加入不溶于该溶液以形成混合浆料的不溶性固体的混合步骤; 还原沉淀步骤，将反应容器装入混合浆料中，然后将氢气吹入反应容器中的混合浆液中以还原混合浆料中的镍络合物离子，以在不溶性固体的表面上形成镍沉淀物; 以及从不溶性固体的表面分离不溶性固体的表面上的镍沉淀物以形成镍粉末的分离步骤。
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公开(公告)号：US09017640B2
公开(公告)日：2015-04-28
申请号：US14359312
申请日：2012-11-19
发明人： Takayuki Nakai , Tatsuya Higaki , Yoshitomo Ozaki
CPC分类号： C22B23/0469 , C01G53/10 , C22B3/0005 , C22B23/0453 , H01M10/0525 , H01M10/30 , H01M10/54 , Y02P10/234 , Y02W30/84
摘要： Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.
摘要翻译： 提供了通过调节萃取剂的浓度和在获得硫酸镍溶液的过程中处理时的pH浓度来获得具有低水平杂质，特别是低水平的镁和氯化物的高纯度硫酸镍的制备方法 通过使用酸性有机萃取剂的溶剂萃取具有高的镍浓度。
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公开(公告)号：US20140348732A1
公开(公告)日：2014-11-27
申请号：US14365842
申请日：2012-12-14
IPC分类号： C22B3/00
CPC分类号： C22B23/043 , C01B17/501 , C01F5/12 , C01F5/40 , C01F11/46 , C01P2002/72 , C01P2004/03
摘要： It is an object to provide a method for producing magnesium oxide by which magnesium oxide being high in purity and low in impurity content can be produced simply and efficiently from a sulfuric acid solution containing magnesium and calcium such as waste water. In the present invention, calcium is precipitated as calcium sulfate and separated by concentrating a sulfuric acid solution containing magnesium and calcium, and magnesium is precipitated as magnesium sulfate and separated by further concentrating the solution resulting from the separation of calcium. The separated magnesium sulfate is roasted together with a reductant, so that magnesium oxide and sulfur dioxide are obtained. The resulting magnesium oxide is washed to produce magnesium oxide with high purity.
摘要翻译： 本发明的目的是提供一种生产氧化镁的方法，通过该方法可以从含有镁和钙的硫酸溶液如废水中简单有效地制备纯度高，杂质含量低的氧化镁。 在本发明中，作为硫酸钙析出钙，通过浓缩含有镁和钙的硫酸溶液进行分离，镁以硫酸镁的形式析出，并通过进一步浓缩由钙分离得到的溶液进行分离。 将分离的硫酸镁与还原剂一起焙烧，得到氧化镁和二氧化硫。 将所得的氧化镁洗涤以产生高纯度的氧化镁。
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