Patents by Inventor Yuuko OHHIGASHI

Yuuko OHHIGASHI 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).

  • AZEOTROPE OR AZEOTROPIC COMPOSITION CONTAINING PENTAFLUOROPROPANE AND WATER, AND METHOD FOR PRODUCING PENTAFLUOROPROPANE
    Publication number: 20230331647
    Abstract: An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.
    Type: Application
    Filed: June 21, 2023
    Publication date: October 19, 2023
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuko OHHIGASHI, Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI
  • Azeotrope or azeotropic composition containing pentafluoropropane and water, and method for producing pentafluoropropane
    Patent number: 11724975
    Abstract: An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: August 15, 2023
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuko Ohhigashi, Tatsuya Takakuwa, Kazuhiro Takahashi
  • AZEOTROPE OR AZEOTROPIC COMPOSITION CONTAINING PENTAFLUOROPROPANE AND WATER, AND METHOD FOR PRODUCING PENTAFLUOROPROPANE
    Publication number: 20220177395
    Abstract: An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.
    Type: Application
    Filed: February 22, 2022
    Publication date: June 9, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuko OHHIGASHI, Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI
  • Azeotrope or azeotropic composition containing pentafluoropropane and water, and method for producing pentafluoropropane
    Patent number: 11286222
    Abstract: An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: March 29, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuko Ohhigashi, Tatsuya Takakuwa, Kazuhiro Takahashi
  • Method for producing hexafluorobutadiene
    Patent number: 11097997
    Abstract: By subjecting a starting material composition containing hexafluorobutadiene and at least one additional compound selected from the group consisting of octafluoro-1-butene, octafluoro-2-butene, heptafluoro-1-butene, and heptafluoro-2-butene to extractive distillation in the presence of an extraction solvent to reduce the concentration of the additional compound, hexafluorobutadiene with higher purity can be obtained.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: August 24, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Yuuko Ohhigashi, Junpei Iyota
  • Method for producing hexafluorobutadiene
    Patent number: 11053182
    Abstract: By subjecting a starting material composition containing hexafluorobutadiene and at least one additional compound selected from the group consisting of octafluoro-1-butene, octafluoro-2-butene, heptafluoro-1-butene, and heptafluoro-2-butene to extractive distillation in the presence of an extraction solvent to reduce the concentration of the additional compound, hexafluorobutadiene with higher purity can be obtained.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: July 6, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Yuuko Ohhigashi, Junpei Iyota
  • METHOD FOR PRODUCING HEXAFLUOROBUTADIENE
    Publication number: 20200247735
    Abstract: By subjecting a starting material composition containing hexafluorobutadiene and at least one additional compound selected from the group consisting of octafluoro-1-butene, octafluoro-2-butene, heptafluoro-1-butene, and heptafluoro-2-butene to extractive distillation in the presence of an extraction solvent to reduce the concentration of the additional compound, hexafluorobutadiene with higher purity can be obtained.
    Type: Application
    Filed: October 23, 2018
    Publication date: August 6, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro TAKAHASHI, Yuuko OHHIGASHI, Junpei IYOTA
  • AZEOTROPE OR AZEOTROPIC COMPOSITION CONTAINING PENTAFLUOROPROPANE AND WATER, AND METHOD FOR PRODUCING PENTAFLUOROPROPANE
    Publication number: 20200199051
    Abstract: An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.
    Type: Application
    Filed: June 15, 2018
    Publication date: June 25, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuko OHHIGASHI, Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI