Flynn and Frishauf
Process for recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum
 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. 
Marubeni Corporation Fuji Fine Chemical Co. Ltd.
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C22B C22B C22B C22B C22B Y02P C22B
inventional inventional inventional inventional inventional additional inventional
by Makoto by Yuko Shigeo Akira Kozo
Higuchi, heir at law Higuchi, heir at law Toida Ohno Higuchi, deceased