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METHOD FOR SUPPRESSING THE POISONING EFFECTS OF CONTAMINANT METALS ON CRACKING CATALYSTS IN FLUID CATALYTIC CRACKING
METHOD FOR SUPPRESSING THE POISONING EFFECTS OF CONTAMINANT METALS ON CRACKING CATALYSTS IN FLUID CATALYTIC CRACKING
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机译:抑制流体催化裂化中污染物对裂化催化剂的中毒作用的方法
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摘要
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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