Patents by Inventor Einosuke Jodo

Einosuke Jodo 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 presulfurizing a desulfurization catalyst used in a hydrodesulfurization unit of petroleum refinery and presulfurization promoter
    Patent number: 6248687
    Abstract: Presulfurizing process and presulfurization promoter for a desulfurization catalyst to be used in a hydrodesulfurization unit of petroleum refinery of high molecular hydrocarbons, in which fresh metal oxide in said desulfurization catalyst is sulfurized with hydrogen sulfide produced from sulfur-containing compounds in a feed stream. In the invention, a compound having mercapto alkylthio group: HS—CmH2m—S— (in which “m” is an integer of 2 to 4) is added as promoter at a proportion of 10 ppm to 0.5% by weight and presulfurization is promoted at 180 to 260° C.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: June 19, 2001
    Assignees: Nippon Shokubai Co., LTD, Elf Atochem S.A.
    Inventors: Hirokazu Itoh, Kazuaki Abe, Yoshihiro Arita, Einosuke Jodo, Kazuya Hata, Tetsushi Kawamura