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    Method for producing nickel powder
    2.
    发明授权
    Method for producing nickel powder 有权

    公开(公告)号：US10549351B2

    公开(公告)日：2020-02-04

    申请号：US15544541

    申请日：2015-03-26

    申请人： SUMITOMO METAL MINING CO., LTD.

    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.

    Method for producing nickel powder
    3.
    发明授权
    Method for producing nickel powder 有权

    公开(公告)号：US10518332B2

    公开(公告)日：2019-12-31

    申请号：US16303313

    申请日：2017-05-30

    申请人： SUMITOMO METAL MINING CO., LTD.

    发明人： Kazuyuki Takaishi ,  Shin-ichi Heguri ,  Ryo-ma Yamaguma ,  Yoshitomo Ozaki ,  Yasuo Doi

    IPC分类号： B22F9/26 ,  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.

    Hydrogen reduction of metal sulphate solutions for decreased silicon in metal powder
    4.
    发明授权
    Hydrogen reduction of metal sulphate solutions for decreased silicon in metal powder 有权

    公开(公告)号：US10449607B2

    公开(公告)日：2019-10-22

    申请号：US15293980

    申请日：2016-10-14

    申请人： Sherritt International Corporation

    发明人： Fu Qin

    IPC分类号： B22F9/26 ,  B22F9/24 ,  C01G3/10 ,  C01G51/10 ,  C01G53/10 ,  C01G51/04 ,  C01G53/04 ,  C01G3/02 ,  C22B3/00

    摘要： Process to decrease silicon content of metal powder produced by hydrogen reduction from ammoniacal ammonium sulphate solutions containing metal ammine complexes, wherein metal (Me) is Ni, Co, or Cu. The process controls the precipitation of metal hydroxide, which is found to be an effective scavenger for silicon. Silicon is preferentially removed from metal diammine sulphate-containing solutions by precipitating with a small amount of a metal hydroxide, and then separating the silicon-bearing metal hydroxide precipitate from the solution. This solution, from which the silicon impurity has been removed with the metal hydroxide precipitate, can then be reduced in one or more densification cycles with a reducing gas to produce an elemental metal powder having a decreased silicon content. Alternatively, the solution is reduced to produce a low silicon metal powder seed material for the first of the one or more densification cycles.

    METHOD FOR PRODUCING NICKEL POWDER
    6.
    发明申请
    METHOD FOR PRODUCING NICKEL POWDER 审中-公开

    公开(公告)号：US20180009037A1

    公开(公告)日：2018-01-11

    申请号：US15544541

    申请日：2015-03-26

    申请人： SUMITOMO METAL MINING CO., LTD.

    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)

    SIZE-CONTROLLED SYNTHESIS OF MONODISPERSED GOLD NANOPARTICLES VIA CARBON MONOXIDE GAS REDUCTION
    9.
    发明申请
    SIZE-CONTROLLED SYNTHESIS OF MONODISPERSED GOLD NANOPARTICLES VIA CARBON MONOXIDE GAS REDUCTION 审中-公开
    通过一氧化碳气体减少的单一金属纳米粒子的大小控制合成

    公开(公告)号：US20140238196A1

    公开(公告)日：2014-08-28

    申请号：US14126710

    申请日：2012-06-22

    申请人： Joseph Young

    发明人： Joseph Young

    IPC分类号： B22F9/26

    CPC分类号： B22F9/26 ,  B22F1/0018 ,  B82Y30/00 ,  C22C5/02

    摘要： A method for forming monodispersed gold particles that includes preparing a solution of gold ions at a specific concentration and pH. Then, while stirring, dispersing CO gas into the solution. The gold ions in the solution are reduced by the CO reducing agent to form desired monodispersed gold particles. The reaction conditions are selected such that the growth period of the monodispersed gold particles is greater than a nucleation period of the gold ions.

    摘要翻译： 一种形成单分散金颗粒的方法，其包括制备在特定浓度和pH下的金离子溶液。 然后，在搅拌的同时，将CO气体分散到溶液中。 溶液中的金离子被CO还原剂还原，形成所需的单分散金颗粒。 选择反应条件使得单分散金颗粒的生长周期大于金离子的成核期。