Patents by Inventor Yuuji Hayase

Yuuji Hayase 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 purifying tetrafluoroethylene
    Patent number: 8247626
    Abstract: To provide a method for purifying tetrafluoroethylene by removing, from tetrafluoroethylene containing a polymerization inhibitor, the polymerization inhibitor by adsorption. A method of bringing tetrafluoroethylene containing a polymerization inhibitor into contact with a silica gel containing a metal salt in an amount of from 250 to 100,000 mass ppm as calculated as metal atoms to remove the polymerization inhibitor by adsorption, and the metal salt is preferably a salt of a metal of Group 3 to 13 of the Periodic Table, more preferably a salt of a metal of Group 8 to 10 of the Periodic Table. For example, as the metal salt, a salt of at least one metal selected from the group consisting of iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium and platinum may be used.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: August 21, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Shigeru Aida, Manabu Sato, Takeya Sakamoto, Nobuo Matsushita, Yuuji Hayase, Tomohiro Gotou, Kenji Fujiwara
  • METHOD FOR PURIFYING TETRAFLUOROETHYLENE
    Publication number: 20110034740
    Abstract: To provide a method for purifying tetrafluoroethylene by removing, from tetrafluoroethylene containing a polymerization inhibitor, the polymerization inhibitor by adsorption. A method of bringing tetrafluoroethylene containing a polymerization inhibitor into contact with a silica gel containing a metal salt in an amount of from 250 to 100,000 mass ppm as calculated as metal atoms to remove the polymerization inhibitor by adsorption, and the metal salt is preferably a salt of a metal of Group 3 to 13 of the Periodic Table, more preferably a salt of a metal of Group 8 to 10 of the Periodic Table. For example, as the metal salt, a salt of at least one metal selected from the group consisting of iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium and platinum may be used.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 10, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shigeru AIDA, Manabu Sato, Takeya Sakamoto, Nobuo Matsushita, Yuuji Hayase, Tomohiro Gotou, Kenji Fujiwara