公开(公告)号：US11781228B2

公开(公告)日：2023-10-10

申请号：US16965423

申请日：2019-04-19

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Hiroto Watanabe ,  Itsumi Matsuoka ,  Yusuke Senba ,  Hiroshi Kobayashi

IPC: C25B1/22 ,  C25B1/50 ,  C25F3/02 ,  C25C1/08 ,  C01G51/10 ,  C01G53/10 ,  C25B9/00 ,  C25B13/02 ,  C25B15/02 ,  C25B15/08 ,  H01M4/525 ,  H01M4/02

CPC classification number: C25B1/22 ,  C01G51/10 ,  C01G53/10 ,  C25B1/50 ,  C25B9/00 ,  C25B13/02 ,  C25B15/02 ,  C25B15/08 ,  C25C1/08 ,  C25F3/02 ,  H01M4/525 ,  C01P2006/40 ,  H01M2004/028

Abstract: A method for manufacturing a sulfuric acid solution includes supplying a chloride ion-containing sulfuric acid solution as an initial electrolyte in an electrolyzer inside of which is divided into an anode chamber and a cathode chamber by a diaphragm; and subsequently taking out a metal dissolved electrolyte in which a metal constituting the anode is dissolved from the anode chamber while supplying a current to an anode and a cathode disposed in the electrolyzer.

公开(公告)号：US20190233960A1

公开(公告)日：2019-08-01

申请号：US16317141

申请日：2017-07-10

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Hiroto Watanabe ,  Itsumi Matsuoka ,  Yusuke Senba ,  Hiroshi Kobayashi

IPC: C25C1/08 ,  C25C7/02 ,  C25C7/08 ,  C25D17/12

CPC classification number: C25C1/08 ,  C25C7/02 ,  C25C7/08 ,  C25D17/12

Abstract: Provided are a metal electrodeposition cathode plate, the non-conductive film of which is not susceptible to failure and which can be used repeatedly, and a production method therefor. This cathode plate comprises a metal plate on which multiple disc-shaped protrusions are disposed, and a non-conductive film formed on the non-protrusion flat areas of the metal plate. The minimum film thickness Y of the non-conductive film at positions between the centers of adjacent protrusions is the same or greater than the height X of the protrusions. It is preferred that the height X of the protrusions is 50 μm to 1000 μm.

公开(公告)号：US20220154308A1

公开(公告)日：2022-05-19

申请号：US17437588

申请日：2020-03-16

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Hideki Ohara ,  Shota Sanjo ,  Masatoshi Takano ,  Satoshi Asano ,  Hiroshi Kobayashi ,  Yusuke Senba ,  Hiroto Watanabe

IPC: C22B3/00 ,  C22B3/08 ,  C22B3/38

Abstract: A method of manufacturing a cobalt-nickel-containing solution including: preparing a crude nickel hydroxide and/or a crude cobalt hydroxide as a starting material, the crude nickel or cobalt hydroxide containing cobalt and nickel and elements except the cobalt and nickel as impurities, the crude nickel hydroxide containing the nickel more than the cobalt, and the crude cobalt hydroxide containing the cobalt more than the nickel; a water-washing process for obtaining a post-water-washing crude hydroxide from the starting material; a leaching process for obtaining a post-leaching solution from the post-water-washing crude hydroxide; a neutralization process of subjecting the post-leaching solution to neutralization and solid-liquid-separation to remove the impurities as a post-neutralization residue containing one or more of iron, silicon, aluminum, and chromium, thereby obtaining a post-neutralization solution; and an extraction process of subjecting the post-neutralization solution to solvent extraction to obtain a post-extraction solution containing cobalt and nickel with the impurities reduced.

公开(公告)号：US12291762B2

公开(公告)日：2025-05-06

申请号：US17437588

申请日：2020-03-16

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Hideki Ohara ,  Shota Sanjo ,  Masatoshi Takano ,  Satoshi Asano ,  Hiroshi Kobayashi ,  Yusuke Senba ,  Hiroto Watanabe

IPC: C22B3/38 ,  C22B3/00 ,  C22B3/08

Abstract: A method of manufacturing a cobalt-nickel-containing solution including: preparing a crude nickel hydroxide and/or a crude cobalt hydroxide as a starting material, the crude nickel or cobalt hydroxide containing cobalt and nickel and elements except the cobalt and nickel as impurities, the crude nickel hydroxide containing the nickel more than the cobalt, and the crude cobalt hydroxide containing the cobalt more than the nickel; a water-washing process for obtaining a post-water-washing crude hydroxide from the starting material; a leaching process for obtaining a post-leaching solution from the post-water-washing crude hydroxide; a neutralization process of subjecting the post-leaching solution to neutralization and solid-liquid-separation to remove the impurities as a post-neutralization residue containing one or more of iron, silicon, aluminum, and chromium, thereby obtaining a post-neutralization solution; and an extraction process of subjecting the post-neutralization solution to solvent extraction to obtain a post-extraction solution containing cobalt and nickel with the impurities reduced.