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US 4,727,053 AGranted
Passivation of metal contaminated cracking catalysts
AssigneePhillips Petroleum Company
InventorsBrent J. Bertus, Darrell W. Walker
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AssigneePhillips Petroleum Company
InventorsBrent J. Bertus, Darrell W. Walker
Estimating the term…
A novel cracking catalyst, a method of preparing same and an improved hydrocarbon cracking process are provided wherein adverse effects of metals such as nickel, vanadium, iron, copper and cobalt in the cracking catalyst are precluded or mitigated by contacting the cracking catalyst with an antimony treating agent comprising at least one of elemental antimony and compounds thereof and a lithium treating agent comprising at least one of elemental lithium and compounds thereof whereby there is added to said catalyst a modifying amount of each antimony treating agent and lithium treating agent with the weight ratio of antimony to lithium being such as to provide passivation of contaminating metals greater than the sum of the passivation effect of each of antimony treating agent and lithium treating agent individually.
A cracking catalyst composition which comprises a cracking catalyst having in combination therewith a passivating agent comprising an antimony treating agent and a lithium treating agent, wherein said lithium treating agent is present in an amount which is greater than about 0.03 but less than about 0.50 weight percent, said weight percent being based on the weight of the cracking catalyst prior to addition of said antimony treating agent and said lithium treating agent.
A metals passivating agent comprising an antimony treating agent and a lithium treating agent, wherein the weight ratio of said antimony treating agent to said lithium treating agent is in the range from about 4:1 to about 0.25:1.
Dependencies are inferred from the claim text.