A heavy metal poisoned, spent FCC catalyst is treated bychemically impregnating the poisoned catalyst with a new catalyticmetal or metal salt to provide an attrition resistant catalyst orsorbent for a different catalytic or absorption processes, such ascatalysts for Fischer-Tropsh Synthesis, and sorbents for removal ofsulfur gasses from fuel gases and flue-gases. The heavy metalcontaminated FCC catalyst is directly used as a support forpreparing catalysts having new catalytic properties and sorbentshaving new sorbent properties, without removing or "passivating"the heavy metals on the spent FCC catalyst as an intermediatestep.
Attrition resistant catalysts and sorbents based on heavy metal poisoned FCC catalysts
Gangwal, S., & Jothimurugesan, K. (1999). IPC No. U.S. Attrition resistant catalysts and sorbents based on heavy metal poisoned FCC catalysts. (U.S. Patent No. 5928980).