Patents by Inventor Nobukazu Iemura

Nobukazu Iemura 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).

  • Process for sulfurization of hydrogenation catalysts
    Patent number: 4151118
    Abstract: A process for activating a hydrogenation catalyst in a hydrogenation system having multiple reaction stages by sulfurization comprising sulfurizing the hydrogenation catalyst in each reaction stage with a sulfur-containing hydrocarbon oil and a hydrogen-rich gas containing less than 1000 ppm (by volume) of hydrogen sulfide, successively in the order of from the final reaction stage thereof to the first reaction stage thereof.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: April 24, 1979
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hisashi Akatsuka, Kiyoaki Naniwa, Nobukazu Iemura, Kazufumi Ishida