Mineral oils: processes and products – Refining – Metal contaminant removal
Patent
1987-05-05
1988-11-15
Sneed, H. M.
Mineral oils: processes and products
Refining
Metal contaminant removal
208120, 208 48AA, 208251R, 208113, 208 52CT, 208127, 502521, 502 84, 436139, B01J 2116
Patent
active
047847522
ABSTRACT:
Poisoning of a cracking catalyst by contaminant metals such as nickel, vanadium and iron during fluid catalytic cracking of hydrocarbon charge stock containing the contaminant metals is suppressed by depositing minor amounts of a bismuth-containing passivating agent on the catalyst, desirably, a weight ratio of bismuth to nickel equivalents (nickel+0.2 vanadium+0.1 iron) of about 0.01:1 to about 1:1. The passivating agent can also comprise mixtures of compounds of bismuth and antimony, bismuth and tin.
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Krishna Ashok S.
Ramamoorthy Periaswamy
Chevron Research Company
DeJonghe T. G.
Dickinson Q. T.
La Paglia S. R.
Myers Helane
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