Patents by Inventor Kohji Kaiso

Kohji Kaiso 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).

  • Refining treatment method of liquid reaction mixture obtained from epoxidation reaction of 1,5,9-cyclododecatriene
    Patent number: 6420575
    Abstract: After 1,5,9-cyclododecatriene is epoxidized with hydrogen peroxide in the presence of a catalyst containing a tungsten compound, a quaternary onium salt and a mineral acid, to obtain a liquid reaction mixture containing the resultant 1,2-epoxy-5,9-cyclododecadiene, the catalyst, non-reacted hydrogen peroxide and non-reacted 1,5,9-cyclododecatriene and being phase-separated into an oil phase fraction and an aqueous phase fraction, at least the oil phase fraction of the liquid reaction mixture is treated with an aqueous alkali solution to deactivate and remove the non-reacted hydrogen peroxide and the catalyst contained in at least the oil phase fraction.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: July 16, 2002
    Assignee: Ube Industries Ltd.
    Inventors: Kouhei Ninomiya, Tsunemi Sugimoto, Junichi Kugimoto, Mitsuo Yamanaka, Kohji Kaiso
  • Refining treatment method of liquid reaction mixture obtained from epoxidation reaction of 1,5,9-cyclododecatriene
    Publication number: 20020045791
    Abstract: After 1,5,9-cyclododecatriene is epoxidized with hydrogen peroxide in the presence of a catalyst containing a tungsten compound, a quaternary onium salt and a mineral acid, to obtain a liquid reaction mixture containing the resultant 1,2-epoxy-5,9-cyclododecadiene, the catalyst, non-reacted hydrogen peroxide and non-reacted 1,5,9-cyclododecatriene and being phase-separated into an oil phase fraction and an aqueous phase fraction, at least the oil phase fraction of the liquid reaction mixture is treated with an aqueous alkali solution to deactivate and remove the non-reacted hydrogen peroxide and the catalyst contained in at least the oil phase fraction.
    Type: Application
    Filed: July 2, 2001
    Publication date: April 18, 2002
    Applicant: Ube Industries, Ltd.
    Inventors: Kouhei Ninomiya, Tsunemi Sugimoto, Junichi Kugimoto, Mitsuo Yamanaka, Kohji Kaiso