Patents by Inventor Itsuo Oonaka

Itsuo Oonaka 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).

  • Preparation process of acrylamide
    Patent number: 5015766
    Abstract: A molten Raney copper alloy containing copper and a metal selected from Al, Si and Zn as major components and, if necessary, specific metals as minor components is solidified at a cooling rate of not less than 1.times.10.sup.2 K/sec by a rotary water atomizing process, water or gas atomizing process, single roll process or similar process. The Raney copper alloy thus obtained is leached to obtain a Raney copper catalyst. The resultant catalyst exhibits activity several times higher than that of conventional Raney copper catalysts in the reaction of acrylonitrile with water to give acrylamide.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: May 14, 1991
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yoshihiko Kambara, Itsuo Oonaka, Koichi Asao, Kyoko Fukushima