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公开(公告)号：US10549351B2
公开(公告)日：2020-02-04
申请号：US15544541
申请日：2015-03-26
发明人： Shin-ichi Heguri , Yoshitomo Ozaki , Kazuyuki Takaishi , Tomoaki Yoneyama , Hideki Ohara , Osamu Ikeda , Yohei Kudo
IPC分类号： B22F9/26
摘要： A method for producing nickel powder sequentially includes: a mixing step of adding, to a nickel ammine sulfate complex solution, an insoluble solid as seed crystals and a polyacrylate or lignosulfonate as a dispersant to form a mixed slurry; and a reduction and precipitation step of charging a reaction vessel with the mixed slurry and blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions in the mixed slurry to form nickel precipitate on the surface of the insoluble solid, wherein the amount of the dispersant added in the mixing step is controlled to control the number of the nickel powder obtained by formation of the nickel precipitate in the reduction and precipitation step.
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公开(公告)号：US10434577B2
公开(公告)日：2019-10-08
申请号：US15127816
申请日：2015-03-24
发明人： Kazumichi Yanagisawa , Junhao Zhang , Kazuyuki Takaishi , Tomoaki Yoneyama , Shin-ichi Heguri , Hideki Ohara , Osamu Ikeda , Yohei Kudo , Yoshitomo Ozaki
摘要： Provided is nickel powder obtained by adding seed crystals to a nickel ammine complex solution and performing hydrogen reduction reaction under high temperatures and high pressures, wherein the nickel powder does not produce dust during handling, and a container can be efficiently filled with the nickel powder. The method for producing nickel powder includes: adding seed crystals and a surfactant having a nonionic or anionic functional group to a solution containing a nickel ammine complex to forma mixed slurry; and subjecting the mixed slurry to hydrogen reduction under high temperature and high pressure conditions in a pressure vessel to obtain nickel powder from the mixed slurry.
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公开(公告)号：US20180009037A1
公开(公告)日：2018-01-11
申请号：US15544541
申请日：2015-03-26
发明人： Shin-ichi Heguri , Yoshitomo Ozaki , Kazuyuki Takaishi , Tomoaki Yoneyama , Hideki Ohara , Osamu Ikeda , Yohei Kudo
IPC分类号： B22F9/26
摘要： A method for producing nickel powder sequentially includes: a mixing step of adding, to a nickel ammine sulfate complex solution, an insoluble solid as seed crystals and a polyacrylate or lignosulfonate as a dispersant to form a mixed slurry; and a reduction and precipitation step of charging a reaction vessel with the mixed slurry and blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions in the mixed slurry to form nickel precipitate on the surface of the insoluble solid, wherein the amount of the dispersant added in the mixing step is controlled to control the number of the nickel powder obtained by formation of the nickel precipitate in the reduction and precipitation step. (120 words)
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公开(公告)号：US20210197266A1
公开(公告)日：2021-07-01
申请号：US16080363
申请日：2017-02-08
发明人： Shin-ichi Heguri , Yoshitomo Ozaki , Osamu Ikeda , Yohei Kudo
摘要： Provided is a method for controlling generation of scaling in a reaction vessel to reduce time and cost required for removal of the scaling in the process of producing nickel powder from a solution containing a nickel ammine sulfate complex. This is a method for producing nickel powder, including: adding, to the solution containing the nickel ammine sulfate complex, seed crystals in an amount of 0.3 times or more and 3 times or less the weight of nickel in the solution to form a slurry; and blowing hydrogen gas into the slurry to reduce a nickel complex ion and to thereby form a nickel precipitate.
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公开(公告)号：US20190061006A1
公开(公告)日：2019-02-28
申请号：US15770546
申请日：2016-10-17
发明人： Osamu Ikeda , Ryo-ma Yamaguma , Yoshitomo Ozaki , Kazuyuki Takaishi , Shin-ichi Heguri , Yohei Kudo , Yasuo Doi
IPC分类号： B22F9/26
摘要： Provided is a method for producing seed crystals of cobalt powder, sequentially including: a complexing step of adding ammonia, an ammonia compound solution, or both of ammonia and an ammonia compound solution to a cobalt sulfate solution to obtain a solution containing a cobalt ammine sulfate complex; a mixing step of adding a solid to the solution containing the cobalt ammine sulfate complex to form a mixture slurry; a reduction and precipitation step of charging a reaction vessel with the mixture slurry, blowing hydrogen gas into the reaction vessel and reducing cobalt contained in the mixture slurry to obtain a cobalt powder slurry containing cobalt precipitate with a cobalt component precipitated on the surface of the solid as cobalt powder; and a solid-liquid separation step of performing solid-liquid separation on the cobalt powder slurry to obtain cobalt precipitate and a solution after reduction.
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公开(公告)号：US20190054541A1
公开(公告)日：2019-02-21
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
IPC分类号： B22F9/26
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：US10092955B2
公开(公告)日：2018-10-09
申请号：US15117855
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
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 includes: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, a dispersant containing a sulfonate and 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.
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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：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：US20170008090A1
公开(公告)日：2017-01-12
申请号：US15119263
申请日：2015-02-09
发明人： Kazumichi Yanagisawa , Junhao Zhang , Osamu Ikeda , Hideki Ohara , Tomoaki Yoneyama , Yohei Kudo , Shin-ichi Heguri
CPC分类号： B22F9/26 , B22F1/0003 , B22F2301/15 , C22B23/0461
摘要： Provided is an efficient method for producing nickel powder from a solution containing a nickel ammine complex, the method including adding seed crystals to a solution containing a nickel ammine complex and subjecting the resulting mixture to hydrogen reduction under high temperatures and high pressures to produce nickel powder, which makes it possible to maintain the quality of the nickel powder produced and reduce the amount of the seed crystals used. The method for producing nickel powder is characterized by adding seed crystals and a dispersant having an anionic functional group to the solution containing a nickel ammine complex to form a mixture slurry, and subjecting the mixture slurry to pressurized hydrogen reduction treatment by blowing hydrogen into the mixture slurry in a high temperature and high pressure atmosphere to cause a reduction reaction, thereby reducing the nickel ammine complex in the mixture slurry to obtain nickel powder.
摘要翻译： 提供了一种从含有镍氨络合物的溶液中制备镍粉的有效方法，该方法包括在含有镍氨络合物的溶液中加入晶种，并将所得混合物在高温高压下进行氢还原，以生产镍粉 ，这使得可以保持所生产的镍粉的质量并减少所用晶种的量。 镍粉的制造方法的特征在于，向含有镍氨络合物的溶液中添加晶种和具有阴离子性官能团的分散剂，形成混合浆料，通过向混合物中吹入氢气使混合物浆料进行加压氢还原处理 浆料在高温高压气氛中引起还原反应，从而还原混合物浆液中的镍氨络合物，得到镍粉。
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