Patents by Inventor Kazuharu Yoshizuka

Kazuharu Yoshizuka 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).

  • Method for producing precursor of lithium adsorbent
    Patent number: 12090464
    Abstract: A method for producing lithium manganese oxide that is a precursor of a lithium adsorbent under atmospheric pressure is provided. The method for producing a precursor of a lithium adsorbent comprises the following steps (1) to (3): (1) A 1st mixing step of mixing a manganese salt and alkali hydroxide, so as to obtain a 1st slurry containing manganese hydroxide; (2) a 2nd mixing step of adding lithium hydroxide to the 1st slurry and then mixing the mixture to obtain a 2nd slurry; and (3) an oxidation step of adding an oxidizing agent to the 2nd slurry, so as to obtain a precursor of a lithium adsorbent. The method for producing a precursor of a lithium adsorbent comprises these steps, so that a precursor of a lithium adsorbent can be produced under atmospheric pressure. Therefore, a precursor of a lithium adsorbent can be produced at a limited cost.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: September 17, 2024
    Assignees: SUMITOMO METAL MINING CO., LTD., THE UNIVERSITY OF KITAKYUSHU
    Inventors: Masatoshi Takano, Shin-Ya Matsumoto, Osamu Ikeda, Yohei Kudo, Satoshi Asano, Kazuharu Yoshizuka, Syouhei Nishihama
  • METHOD FOR PRODUCING PRECURSOR OF LITHIUM ADSORBENT
    Publication number: 20200391177
    Abstract: A method for producing lithium manganese oxide that is a precursor of a lithium adsorbent under atmospheric pressure is provided. The method for producing a precursor of a lithium adsorbent comprises tire following steps (1) to (3): (1) A 1st mixing step of mixing a manganese salt and alkali hydroxide, so as to obtain a 1st slurry containing manganese hydroxide; (2) a 2nd mixing step of adding lithium hydroxide to the 1st slurry and then mixing the mixture to obtain a 2nd slurry; and (3) an oxidation step of adding an oxidizing agent to the 2nd slurry, so as to obtain a precursor of a lithium adsorbent. The method for producing a precursor of a lithium adsorbent comprises these steps, so that a precursor of a lithium adsorbent can be produced under atmospheric pressure. Therefore, a precursor of a lithium adsorbent can be produced at a limited cost.
    Type: Application
    Filed: April 17, 2019
    Publication date: December 17, 2020
    Applicants: SUMITOMO METAL MINING CO., LTD., THE UNIVERSITY OF KITAKYUSHU
    Inventors: Masatoshi TAKANO, Shin-ya MATSUMOTO, Osamu IKEDA, Yohei KUDO, Satoshi ASANO, Kazuharu YOSHIZUKA, Syouhei NISHIHAMA
  • Extraction agent for palladium and platinum and process of extracting same
    Patent number: 5342526
    Abstract: Disclosed herein are an extracting agent for precious metal having the below foretold and a process of extracting precious metals employing the said extracting agent from a hydrochloric acid solution containing the precious metals. Further, by controlling the concentration of the hydrochloric acid solution and the extraction time, the separation of the metals can be performed.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: August 30, 1994
    Assignee: Tanaka Kikinzoku Kogyo K.K.
    Inventors: Katsutoshi Inoue, Kazuharu Yoshizuka, Yoshinari Baba, Masato Tazaki