Pyrometallurgical process and plant for selective recycling of molybdenum in the reprocessing of spent petrochemical catalysts
AssigneeEco'ring
InventorsJean-Luc Roth, Lionel Picard
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Abstract
For treating petrochemical catalysts for the selective extraction of molybdenum therefrom, a plant and a process are proposed for extracting the molybdenum by charging a batch of catalysts to a rotary kiln of which the refractory is heated or preheated to a high temperature, and setting the kiln in rotation so that the catalyst charge undergoes constant renewal of the surface in contact with the superheated refractory. The catalyst charge is brought to temperatures of the order of 1300° C. (1250 to 1350° C.), which allow around 95% of the molybdenum present to sublime.
Claims11
A process of treatment of spent industrial catalysts containing molybdenum, consisting in charging the catalysts into a kiln the refractories of which are heated to at least 1250° C., in entraining by a gas flow, a gaseous fraction forming in the kiln and in condensing said fraction outside the kiln, characterized in that the kiln is rotating.
Dependencies are inferred from the claim text.