Patents by Inventor Yoshio Asahi

Yoshio Asahi 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).

  • Patent number: 5760288
    Abstract: Provided is a process for producing an aromatic carboxylic acid by oxidizing an aromatic compound having an alkyl group or a partially-oxidized alkyl group with a molecular-oxygen-containing gas in an aqueous medium, characterized in that a compound in which a transition metal is incorporated into a heteropoly-acid skeleton having a deficient structural moiety is used as a catalyst.In accordance with the present invention, the aromatic carboxylic acid can be produced efficiently at low costs.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: June 2, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoshio Asahi, Yosuke Iida, Koshi Sasaki, Yuji Mizuho
  • Patent number: 4649217
    Abstract: Oxocarboxylic acids, for example adipaldehydic acid can be advantageously produced by a process, in which cyclohexanones are oxidized with molecular oxygen in the presence of water and iron or iridium compound, preferably also in the presence of a sulfur or organic nitrogen compound.
    Type: Grant
    Filed: March 15, 1983
    Date of Patent: March 10, 1987
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Takao Maki, Kenji Murayama, Yoshio Asahi
  • Patent number: 4556751
    Abstract: Catalytic isomerization of 10 types of dimethylnaphthalenes, which are classified into four groups, can be carried out by using as a catalyst a zeolite defining the main pore opening consists of a ten-membered oxygen ring.
    Type: Grant
    Filed: February 14, 1984
    Date of Patent: December 3, 1985
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Takao Maki, Tetsuo Masuyama, Yoshio Asahi