Process for reducing possibility of leaching of heavy metals from used petroleum cracking catalyst in land fills
AssigneePhillips Petroleum Company
InventorsBrent J. Bertus, Dwight L. McKay, John S. Roberts
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Abstract
A used petroleum or hydrocarbon conversion or cracking catalyst having metal contaminants thereon which are leachable by water therefrom is treated with tin and/or indium and/or a compound of tin and/or a compound of indium to reduce leachability of said metal therefrom rendering the thus treated contact mass or catalyst more safe to be disposed of at a landfill.
Claims5
A process for discarding a used catalyst or contact mass to be discarded and having thereon metal resulting from its use as a petroleum conversion catalyst, said metal being leachable therefrom with water, which comprises treating said catalyst just prior to its discard with at least one of tin, indium, a compound of tin, and a compound of indium in an amount sufficient and in a manner to stabilize against leaching of metals thereon by ground water and then discarding said catalyst to a place at which ground water exists.
Dependencies are inferred from the claim text.