Patents by Inventor Yusuke Senba

Yusuke Senba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12291762
    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 ob
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: May 6, 2025
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hideki Ohara, Shota Sanjo, Masatoshi Takano, Satoshi Asano, Hiroshi Kobayashi, Yusuke Senba, Hiroto Watanabe
  • Publication number: 20240391786
    Abstract: To provide a method for producing lithium hydroxide allowing obtaining high purity lithium hydroxide by reducing impurities to a preliminarily determined level in a step before a conversion step by electrodialysis. The method for producing lithium hydroxide includes steps (1) to (5) below: (1) a hydrocarbonating step of blowing carbon dioxide to a slurry of a mixture of water and rough lithium carbonate; (2) a decarbonation step of heating a lithium hydrogen carbonate solution; (3) an acid solution dissolution step of dissolving a purified lithium carbonate in an acid solution; (4) an impurity removal step of removing a part of metal ions from a first lithium containing solution; and (5) a conversion step of converting lithium salt contained in a second lithium containing solution into lithium hydroxide by electrodialysis. This producing method allows reliably removing metals other than lithium, thereby allowing an increased purity of obtained lithium hydroxide.
    Type: Application
    Filed: December 13, 2022
    Publication date: November 28, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Yusuke SENBA, Masatoshi TAKANO, Satoshi ASANO, Shin-ichi HEGURI
  • Publication number: 20240375971
    Abstract: To provide a method for producing lithium hydroxide allowing increasing a purity of an obtained lithium hydroxide. The method for producing lithium hydroxide includes a lithium adsorption step, a lithium elution step, an impurity removal step, and a conversion step. The impurity removal step includes: (3A) a carbonating step of a step of adding a carbonic acid source to a second lithium containing solution to obtain rough lithium carbonate; (3B) a hydrocarbonating step of a step of blowing carbon dioxide to a slurry containing rough lithium carbonate to obtain a lithium hydrogen carbonate solution; (3C) a decarbonation step of a step of heating the lithium hydrogen carbonate solution to obtain purified lithium carbonate; and (3D) an acid solution dissolution step of a step of dissolving the purified lithium carbonate in an acid solution to obtain a third lithium containing solution.
    Type: Application
    Filed: September 26, 2022
    Publication date: November 14, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Masatoshi TAKANO, Satoshi ASANO, Shin-ichi HEGURI, Osamu IKEDA, Shin-ya MATSUMOTO, Yohei KUDO, Akihiro MURAKAMI, Yusuke SENBA, Kyohei MAEDA
  • Publication number: 20240308864
    Abstract: A method for producing a lithium containing solution includes a neutralization step of obtaining an untreated lithium containing solution by adding alkali to a crude lithium containing solution and an ion-exchange step of obtaining a lithium containing solution in which a predetermined metallic element is reduced compared with an untreated lithium containing solution by using an ion-exchange resin. In the ion-exchange step, the predetermined metallic element is removed by passing the untreated lithium containing solution through a column containing the ion-exchange resin. A portion of the untreated lithium containing solution passing through the column that is a preliminarily determined amount after starting the liquid passing into the column is to be excluded from the lithium containing solution.
    Type: Application
    Filed: October 17, 2022
    Publication date: September 19, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Masatoshi TAKANO, Satoshi ASANO, Shin-ichi HEGURI, Yusuke SENBA
  • Patent number: 11781228
    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.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: October 10, 2023
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroto Watanabe, Itsumi Matsuoka, Yusuke Senba, Hiroshi Kobayashi
  • Publication number: 20230174385
    Abstract: Provided is a method for producing a lithium-containing solution that allows increasing a content rate of lithium in a solution after an eluting step, and suppressing an amount of an eluted solution used in a process after the eluting step, thus suppressing production cost of lithium. A method for producing a lithium-containing solution includes an adsorption step of bringing a lithium adsorbent obtained from lithium manganese oxide in contact with a low lithium-containing solution to obtain post-adsorption lithium manganese oxide, an eluting step of bringing the post-adsorption lithium manganese oxide in contact with an acid-containing solution to obtain an eluted solution, and a manganese oxidation step of oxidating manganese to obtain a lithium-containing solution with a suppressed manganese concentration. The adsorption step, the eluting step, and the manganese oxidation step are performed in this order, and the acid-containing solution includes the eluted solution with acid added.
    Type: Application
    Filed: March 30, 2022
    Publication date: June 8, 2023
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Osamu IKEDA, Masatoshi TAKANO, Satoshi ASANO, Shin-ichi HEGURI, Shin-ya MATSUMOTO, Yohei KUDO, Yusuke SENBA, Kyohei MAEDA
  • Publication number: 20220154308
    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 ob
    Type: Application
    Filed: March 16, 2020
    Publication date: May 19, 2022
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hideki Ohara, Shota Sanjo, Masatoshi Takano, Satoshi Asano, Hiroshi Kobayashi, Yusuke Senba, Hiroto Watanabe
  • Publication number: 20210230755
    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.
    Type: Application
    Filed: April 19, 2019
    Publication date: July 29, 2021
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroto WATANABE, Itsumi MATSUOKA, Yusuke SENBA, Hiroshi KOBAYASHI
  • Patent number: 10704120
    Abstract: The present invention provides a method for easy and efficient recovery of high purity scandium from nickel oxide ore, the method comprising: an adsorption step for passing a scandium-containing solution through an ion exchange resin to adsorb scandium on the ion exchange resin; an elution step for eluting scandium from the ion exchange resin to obtain a post-elution solution; an impurity extraction step in which after the elution step, the scandium-containing solution is subjected to a first solvent extraction using an amine-based impurity extractant and is separated into a first aqueous phase containing scandium and into a first organic phase containing impurities; and a scandium extraction step in which the first aqueous phase is subjected to a second solvent extraction using an amide derivative-containing scandium extractant to obtain a second organic phase containing scandium.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: July 7, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Itsumi Matsuoka, Hiroshi Kobayashi, Yusuke Senba
  • Patent number: 10697043
    Abstract: In separating scandium and thorium from a leachate obtained by adding sulfuric acid to a nickel oxide ore containing scandium and thorium, scandium is recovered from only one system. The method according to the invention comprises: an extraction step S1 for treating a nickel oxide ore containing scandium and thorium with sulfuric acid to give an acidic solution (a feed solution for extraction), and then solvent-extracting the feed solution with the use of a scandium extractant containing an amide derivative to thereby divide the feed solution into an organic extract (a first organic phase) containing scandium and thorium and a liquid extract (a first aqueous phase) containing impurities; and a washing step S2 for adding sulfuric acid to the organic extract (the first organic phase) and thus dividing the same into washed organic matters (a second organic phase) containing thorium and a washed liquid (a second aqueous phase) containing scandium.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 30, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Yusuke Senba, Itsumi Matsuoka, Hiroshi Kobayashi
  • Publication number: 20190233960
    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 ?m to 1000 ?m.
    Type: Application
    Filed: July 10, 2017
    Publication date: August 1, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroto Watanabe, Itsumi Matsuoka, Yusuke Senba, Hiroshi Kobayashi
  • Publication number: 20190062869
    Abstract: In separating scandium and thorium from a leachate obtained by adding sulfuric acid to a nickel oxide ore containing scandium and thorium, scandium is recovered from only one system. The method according to the invention comprises: an extraction step S1 for treating a nickel oxide ore containing scandium and thorium with sulfuric acid to give an acidic solution (a feed solution for extraction), and then solvent-extracting the feed solution with the use of a scandium extractant containing an amide derivative to thereby divide the feed solution into an organic extract (a first organic phase) containing scandium and thorium and a liquid extract (a first aqueous phase) containing impurities; and a washing step S2 for adding sulfuric acid to the organic extract (the first organic phase) and thus dividing the same into washed organic matters (a second organic phase) containing thorium and a washed liquid (a second aqueous phase) containing scandium.
    Type: Application
    Filed: March 1, 2017
    Publication date: February 28, 2019
    Inventors: Yusuke Senba, Itsumi Matsuoka, Hiroshi Kobayashi
  • Publication number: 20190040492
    Abstract: The present invention provides a method for easy and efficient recovery of high purity scandium from nickel oxide ore, the method comprising: an adsorption step for passing a scandium-containing solution through an ion exchange resin to adsorb scandium on the ion exchange resin; an elution step for eluting scandium from the ion exchange resin to obtain a post-elution solution; an impurity extraction step in which after the elution step, the scandium-containing solution is subjected to a first solvent extraction using an amine-based impurity extractant and is separated into a first aqueous phase containing scandium and into a first organic phase containing impurities; and a scandium extraction step in which the first aqueous phase is subjected to a second solvent extraction using an amide derivative-containing scandium extractant to obtain a second organic phase containing scandium.
    Type: Application
    Filed: January 31, 2017
    Publication date: February 7, 2019
    Inventors: Itsumi Matsuoka, Hiroshi Kobayashi, Yusuke Senba