Patents Assigned to Hokkaido Soda Co., Ltd.
  • Method for refining sugar solutions
    Patent number: 4362571
    Abstract: Disclosed is a method for refining sugar solutions with magnesia wherein magnesia used for refining of a sugar solution is calcined together with pearlite and/or diatomaceous earth at least in an amount of the same weight as that of the magnesia and the resulting calcined mixture is used for refining of the sugar solution again.
    Type: Grant
    Filed: May 27, 1981
    Date of Patent: December 7, 1982
    Assignees: Agency of Industrial Science & Technology, Sumitomo Jukikai Envirotech, Inc., Hokkaido Soda Co., Ltd., Mitsui Sugar Co., Ltd.
    Inventors: Yoshikatsu Ikari, Shiyoichiro Yokoyama, Keisuke Katoh, Ryutaro Itaya, Toshio Kaga
  • Method for treating waste water containing organic contaminants utilizing a magnesia adsorbent
    Patent number: 4216084
    Abstract: Magnesia particles obtained by calcining at a temperature of 500.degree.-700.degree. C. show excellent adsorbing properties.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: August 5, 1980
    Assignees: Agency of Industrial Science & Technology, Hokkaido Soda Co., Ltd.
    Inventors: Yoshikatsu Ikari, Shoichiro Yokoyama, Ryutaro Itaya, Tsuneo Ohkuma
  • Magnesia adsorbent
    Patent number: 4147665
    Abstract: Magnesia particles obtained by calcining at a temperature of 500.degree. - 700.degree. C. show excellent adsorbing properties.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: April 3, 1979
    Assignees: Agency of Industrial Science & Technology, Hokkaido Soda Co., Ltd.
    Inventors: Yoshikatsu Ikari, Shoichiro Yokoyama, Ryutaro Itaya, Tsuneo Ohkuma