Patents by Inventor Hideharu Kuwamoto

Hideharu Kuwamoto 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 chlorine by oxidation of hydrogen chloride
    Patent number: 11072527
    Abstract: The method for producing chlorine by oxidation of hydrogen chloride with oxygen in the presence of a catalyst in a fixed-bed reactor, wherein [I] a material containing hydrogen chloride and oxygen is allowed to contact a catalyst in a temperature range of 280 to 370° C., and [II] the material containing hydrogen chloride and oxygen has an oxygen concentration of 45 to 75 vol %.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: July 27, 2021
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Masami Murakami, Hideharu Kuwamoto, Kenji Iwata
  • METHOD FOR PRODUCING CHLORINE BY OXIDATION OF HYDROGEN CHLORIDE
    Publication number: 20190292049
    Abstract: The method for producing chlorine by oxidation of hydrogen chloride with oxygen in the presence of a catalyst in a fixed-bed reactor, wherein [I] a material containing hydrogen chloride and oxygen is allowed to contact a catalyst in a temperature range of 280 to 370° C., and [II] the material containing hydrogen chloride and oxygen has an oxygen concentration of 45 to 75 vol %.
    Type: Application
    Filed: November 29, 2017
    Publication date: September 26, 2019
    Inventors: Masami MURAKAMI, Hideharu KUWAMOTO, Kenji IWATA
  • Process of preparing purified aqueous indole solution
    Patent number: 5085991
    Abstract: A process for preparing substantially purified aqueous indole solution. In the process of the present invention, crude indole containing an organic impurity is dissolved in an organic solvent which is immiscible with water, the distribution ratio of the impurity to the organic phase, when two-phase liquid system is formed with the organic solvent and an aqueous medium, being greater than that of indole; and the indole solution is contacted with water or an aqueous reaction medium for conducting the reaction to form two-phase liquid system and to distribute indole to the aqueous phase.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: February 4, 1992
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shinji Ogawa, Seiya Iguchi, Hiroshi Kimura, Hideharu Kuwamoto