METHOD TO RECOVER SPENT HYDROPROCESSING CATALYST ACTIVITY

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In accordance with one or more embodiments of the present disclosure, a method for regenerating and rejuvenating a spent catalyst comprising coke and contaminant metals includes washing the spent catalyst with a solvent; drying, at least partially, the spent catalyst; partially combusting the spent catalyst to remove a portion of the coke, thereby producing a partially de-coked catalyst; acid washing the partially de-coked catalyst; and fully combusting the partially de-coked catalyst, thereby producing a regenerated and rejuvenated catalyst. The portion of the coke removed during the partial combustion is greater than or equal to 10 wt.% and less than or equal to 60 wt.%. No rare earth elements are added to the partially de-coked catalyst prior to the fully combusting the partially de-coked catalyst.