Patents by Inventor Toshimitsu Sukigara

Toshimitsu Sukigara 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 of recovering chlorine gas from calcium chloride
    Patent number: 6994836
    Abstract: There is disclosed a method of recovering chlorine gas from calcium chloride comprising the steps of introducing calcium chloride into a heat-resistant vessel which is provided with a gas inlet pipe and a gas outlet pipe, heating the calcium chloride up to at least the melting point thereof while introducing an inert gas from the gas inlet pipe into the vessel to produce fused salt of calcium chloride, and heating the interior of the vessel up to at least 1073K and switching a gas to be introduced from the gas inlet pipe from the inert gas to oxygen to allow the fused salt of calcium chloride to react with the oxygen to obtain chlorine gas and calcium oxide, the chlorine gas being subsequently rapidly and continuously discharged from the vessel through the gas outlet pipe.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: February 7, 2006
    Assignee: President of Shizuoka University
    Inventors: Akifumi Ueno, Naoto Azuma, Takefumi Kondo, Toshimitsu Sukigara, Yusaku Sakata
  • Method of recovering chlorine gas from calcium chloride
    Publication number: 20040042956
    Abstract: There is disclosed a method of recovering chlorine gas from calcium chloride comprising the steps of introducing calcium chloride into a heat-resistant vessel which is provided with a gas inlet pipe and a gas outlet pipe, heating the calcium chloride up to at least the melting point thereof while introducing an inert gas from the gas inlet pipe into the vessel to produce fused salt of calcium chloride, and heating the interior of the vessel up to at least 1073K and switching a gas to be introduced from the gas inlet pipe from the inert gas to oxygen to allow the fused salt of calcium chloride to react with the oxygen to obtain chlorine gas and calcium oxide, the chlorine gas being subsequently rapidly and continuously discharged from the vessel through the gas outlet pipe.
    Type: Application
    Filed: November 8, 2002
    Publication date: March 4, 2004
    Inventors: Akifumi Ueno, Naoto Azuma, Takefumi Kondo, Toshimitsu Sukigara, Yusaku Sakata