Patents by Inventor Yuta KITAGAWA

Yuta KITAGAWA 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 AND APPARATUS FOR PRODUCING VANADIUM COMPOUND, AND METHOD AND APPARATUS FOR PRODUCING REDOX-FLOW BATTERY ELECTROLYTE
    Publication number: 20220364204
    Abstract: A production method includes: an alkali extraction step of adding an alkali and water, or an alkali solution, to raw material ash containing an ammonium sulfate component, sulfuric acid, vanadium, and at least one other metal selected from nickel, iron, and magnesium, wherein a pH of 13 or higher is achieved, to obtain an alkali leachate; a solid-liquid separation step on the alkali leachate to obtain a leach filtrate containing vanadium; an evaporation concentration step of evaporating and concentrating the leach filtrate to obtain a concentrated liquid; and a crystallization/solid-liquid separation step of cooling and crystalizing the concentrated liquid and recovering a precipitate containing a vanadium compound.
    Type: Application
    Filed: June 11, 2020
    Publication date: November 17, 2022
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Manabu MASAMOTO, Takashi NISHINO, Yuta KITAGAWA, Daichi AKAGI