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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：US20190210114A1
公开(公告)日：2019-07-11
申请号：US16303313
申请日：2017-05-30
IPC分类号： B22F9/24
摘要： A nickel sulfate amine complex liquid and nickel powder having a particle diameter of 0.1 μm to 300 μm are supplied to a reaction container, hydrogen gas is continuously supplied while the inside of the reaction container is maintained at 150° C. to 250° C., and the pressure is set to 2.5 MPa to 3.5 MPa, whereby nickel ions in the nickel sulfate amine complex liquid are reduced to nickel and deposited on the surfaces of the nickel powder supplied to the reaction container, a reacted slurry including the nickel sulfate amine complex liquid and the nickel powder is then transferred to a pressurized storage container at the same or slightly lower pressure than the internal pressure of the reaction container, and the pressure of the pressurized storage container to which the reacted slurry is transferred is then reduced, after which the reacted slurry is extracted from the pressurized storage container.
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公开(公告)号：US20180169764A1
公开(公告)日：2018-06-21
申请号：US15738244
申请日：2016-06-27
发明人： Ryo-ma Yamaguma , Yoshitomo Ozaki , Kazuyuki Takaishi , Shin-ichi Heguri , Osamu Ikeda , Yohei Kudo , Yasuo Doi
IPC分类号： B22F9/26
CPC分类号： B22F9/26 , B22F2301/15 , B22F2998/00 , B22F2999/00 , C22B23/043 , C22B23/0446
摘要： Provided is a method for producing cobalt powder with high reaction efficiency by controlling the amount of added seed crystals when cobalt powder is produced from a solution containing a cobalt ammine sulfate complex. The method sequentially includes: a mixing step of adding, to the solution containing a cobalt ammine sulfate complex, cobalt powder as seed crystals in an amount of 1.5 times or more and 3.0 times or less the amount of cobalt contained in the solution and then adding a dispersant in an amount of 1.5% by weight to 3.0% by weight of the added seed crystals to form a mixture slurry; and a reduction and precipitation step of charging a reaction vessel with the mixture slurry and then blowing hydrogen gas into the mixture slurry to reduce cobalt complex ions contained in the mixture slurry to form cobalt precipitate on the surface of the seed crystals.
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公开(公告)号：US10518332B2
公开(公告)日：2019-12-31
申请号：US16303313
申请日：2017-05-30
摘要： A nickel sulfate amine complex liquid and nickel powder having a particle diameter of 0.1 μm to 300 μm are supplied to a reaction container, hydrogen gas is continuously supplied while the inside of the reaction container is maintained at 150° C. to 250° C., and the pressure is set to 2.5 MPa to 3.5 MPa, whereby nickel ions in the nickel sulfate amine complex liquid are reduced to nickel and deposited on the surfaces of the nickel powder supplied to the reaction container, a reacted slurry including the nickel sulfate amine complex liquid and the nickel powder is then transferred to a pressurized storage container at the same or slightly lower pressure than the internal pressure of the reaction container, and the pressure of the pressurized storage container to which the reacted slurry is transferred is then reduced, after which the reacted slurry is extracted from the pressurized storage container.
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公开(公告)号：US20180257143A1
公开(公告)日：2018-09-13
申请号：US15759356
申请日：2016-07-11
摘要： A method for manufacturing nickel powder whereby a reduction in production efficiency due to abrasion of a flash vessel connected to a pressurized container can be suppressed when nickel powder is generated using the pressurized container and subsequently recovered. The method for manufacturing nickel powder comprises charging a pressurized container with a nickel sulfate ammine complex solution and seed crystals, adding hydrogen gas to the pressurized container, and reducing the nickel included in the nickel sulfate ammine complex solution, wherein, when a nickel powder slurry obtained in the pressurized container is extracted to a flash vessel connected to the pressurized container, the slurry is extracted to the flash vessel while the supply rate of the nickel ammine complex solution to the pressurized container and/or the extraction rate of the nickel slurry from the pressurized container is controlled so the liquid level in the pressurized container is in a fixed range.
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公开(公告)号：US20180056399A1
公开(公告)日：2018-03-01
申请号：US15559845
申请日：2016-03-16
发明人： Shin-ichi Heguri , Yoshitomo Ozaki , Kazuyuki Takaishi , Yasuo Doi , Osamu Ikeda , Ryoma Yamaguma , Yohei Kudo
CPC分类号： B22F9/26 , B22F3/16 , B22F2201/013 , B22F2301/15 , C22B3/08 , C22B23/043 , C22B23/0461 , C22B23/0476 , C22B23/0484
摘要： Provided is a production method for producing coarse particles of high purity Co powder from a cobalt ammine sulfate complex solution using fine Co powder and using industrially inexpensive H2 gas.
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