Patents by Inventor Jimbo, Takashi

Jimbo, Takashi 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).

  • Catalyst for producing maleic anhydride from butane and process for preparing same
    Patent number: 5155235
    Abstract: A catalyst for producing maleic anhydride by oxidation of n-butane comprising V,P and additionally Mg or Zr is prepared by(a) heating a pentavalent vanadium compound in an organic medium to reduce at least a part of the pentavalent vanadium to tetravalent vanadium,(b) reacting the resulting vanadium compound with phosphoric acid in the presence of at least one of a magnesium compound and a zirconium compound to form a catalyst precursor,(c) separating the resulting catalyst precursor from the organic medium, and(d) drying and calcining the catalyst precursor.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: October 13, 1992
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Jimbo Takashi, Tadamitsu Kiyoura, Yasuo Kogure, Kazuo Kanaya
  • Process for producing catalyst precursor and corresponding catalyst
    Patent number: 5032564
    Abstract: A cayalyst precursor is produced by reacting V.sub.2 O.sub.4 with phosphoric acid in an organic solvent in the presence of a polyol. The catalyst precursor is calcined to obtain a catalyst having a high density, highly attrition-resistance and a large specific surface area and requiring only a low temperature for the oxidation of butane.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: July 16, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadamitsu Kiyoura, Jimbo, Takashi, Yasuo Kogure, Kazuo Kanaya