Patents Assigned to Fuji Fine Chemical Co. Ltd.
  • Process for recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum
    Patent number: 4145397
    Abstract: From roasted products of used catalysts from hydrotreatment desulfurization of petroleum, valuable molybdenum, vanadium, cobalt and nickel are recovered easily and a high percent recovery by means of a combination of simple chemical procedures and also inexpensive chemicals. The recovered metal components can be reused for preparing new catalysts and the like.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: March 20, 1979
    Assignees: Marubeni Corporation, Fuji Fine Chemical Co. Ltd.
    Inventors: Shigeo Toida, Akira Ohno, Kozo Higuchi, deceased, by Makoto Higuchi, heir at law, by Yuko Higuchi, heir at law