Patents by Inventor Kazuyoshi Kudoh

Kazuyoshi Kudoh 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 composition for hydrogenation of heavy hydrocarbon oil and process for producing the catalyst
    Patent number: 4981832
    Abstract: A catalyst composition for the hydrogenation of heavy hydrocarbon oil, where the catalyst composition comprises at least one active ingredient for hydrogenation supported on a porous alumina carrier and has the following characteristics: (1) the total volume of the pores therein is from 0.4 to 1.0 ml/g; (2) the mean pore diameter of pores having a pore diameter of from 5 to 400 .ANG. is from 60 to 140 .ANG.; (3) the volume of pores having a pore size within .+-.25% of the mean pore diameter of pores having a pore diameter of from 5 to 400 .ANG. is from 60 to 98% of the volume of pores having a pore diameter of from 5 to 400 .ANG.; (4) the volume of pores having a pore diameter of from 400 to 5000 .ANG. is from 2 to 9% of the total volume of the entire pores; (5) the ratio (mm.sup.2 /mm.sup.3) of the outer surface area of a molded catalyst powder to the volume thereof is from 4 to 8; and (6) all points in the interior of the molded catalyst particle are positioned within 0.05 to 0.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: January 1, 1991
    Assignee: Research Association for Residual Oil Processing
    Inventors: Kinya Tawara, Kazuyoshi Kudoh, Kazushi Usui, Tomohiro Yoshinari, Shigenori Nakashizu