Patents by Inventor Yoshihiro Ohguchi

Yoshihiro Ohguchi 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 oxidizing sulfide-containing liquor
    Patent number: 4855123
    Abstract: A method of treating an aqueous sodium sulfide solution, such as white liquor in kraft pulping systems, for the oxidation of the sulfide with oxygen in the presence of a specific activated carbon catalyst which is (a) a particulate activated carbon catalyst having an average particle diameter of 0.2-4 mm, a pore volume of at least 0.25 cc/g in pores with diameters of not smaller than 100 .ANG. and a pore volume of at least 35% of the total pore volume in pores with diameters of not smaller than 100 .ANG. or (b) a fibrous activated carbon catalyst having a specific surface area of 300-2500 m.sup.2 /g and an outer surface area of 0.1-5 m.sup.2 /g.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: August 8, 1989
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Masayuki Suzuki, Shinichi Hara, Kuniaki Kimura, Takeo Ono, Munekazu Nakamura, Yoshihiro Ohguchi
  • Demetallation of hydrocarbons with catalysts supported on sepiolite
    Patent number: 4152250
    Abstract: This invention relates to a catalyst for hydrotreatment of hydrocarbons comprising one or more of metals selected from the group consisting of transition metals and metals of group IIb of the periodic table supported on sepiolite. More particularly it relates to a catalyst effective in the selective demetallization treatment of hydrocarbons.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: May 1, 1979
    Assignee: Chiyoda Chemical Engineering & Construction
    Inventors: Masayoshi Inooka, Motoyoshi Wakabayashi, Masatoshi Matsuda, Masaaki Kasuya, Yoshihiro Ohguchi, Munekazu Nakamura, Tatsuo Morimoto
  • Catalysts for demetallization treatment of hydrocarbons supported on sepiolite
    Patent number: RE31039
    Abstract: This invention relates to a catalyst for hydrotreatment of hydrocarbons comprising one or more of metals selected from the group consisting of transition metals and metals of group IIb of the periodic table supported on sepiolite. More particularly it relates to a catalyst effective in the selective demetallization treatment of hydrocarbons.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: September 21, 1982
    Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.
    Inventors: Masayoshi Inooka, Yoshihiro Ohguchi