Patents by Inventor Kouzou Takeuchi

Kouzou Takeuchi 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 selective hydrogenation of highly unsaturated hydrocarbon compound in olefin compound
    Patent number: 6084140
    Abstract: A palladium-base catalyst can selectively hydrogenate highly unsaturated hydrocarbon compounds contained in small amounts in an olefin compound prepared by steam cracking or the like of naphtha without causing hydrogenation of the olefin as a side reaction and the precipitation of a carbonaceous material. The catalyst comprises palladium and alumina, and the exposed face of each palladium crystallite is mainly accounted for by (100) and (110) faces. Further, in the desorption of absorbed hydrogen by heating, desorption peaks are observed in the temperature ranges of 40 to 90.degree. C. and of 120 to 170.degree. C. and the ratio of hydrogen desorption amount of the former to the latter is (4:6) to (3:7).
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: July 4, 2000
    Assignee: Sud-Chemie Nissan Catalyst, Inc.
    Inventors: Tadakuni Kitamura, Kouzou Takeuchi, Junichi Yazaki, Yuzo Satou, Moriyasu Sugeta