Patents by Inventor Mikio Nakagoshi

Mikio Nakagoshi 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 separating hexafluoropropylene oxide from hexafluoropropylene
    Patent number: 8877017
    Abstract: The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CnHaFb (wherein n, a and b are integers which satisfy: n=3 to 8, 0?a?2n+1, and 1?b?2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: November 4, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Hideki Nakaya, Kazuyoshi Ichihara, Yasuhide Senba, Mikio Nakagoshi, Kazunori Morimoto
  • METHOD FOR SEPARATING HEXAFLUOROPROPYLENE OXIDE FROM HEXAFLUOROPROPYLENE
    Publication number: 20120006672
    Abstract: The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CnHaFb (wherein n, a and b are integers which satisfy: n=3 to 8, 0?a?2n+1, and 1?b?2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.
    Type: Application
    Filed: February 18, 2010
    Publication date: January 12, 2012
    Inventors: Hideki Nakaya, Kazuyoshi Ichihara, Yasuhide Senba, Mikio Nakagoshi, Kazunori Morimoto