Mineral oils: processes and products – Refining – Metal contaminant removal
Patent
1989-08-07
1990-10-23
Garvin, Patrick P.
Mineral oils: processes and products
Refining
Metal contaminant removal
208251R, 208307, C10G 2904
Patent
active
049649795
ABSTRACT:
Contaminant metals in hydrocarbon oils such as nickel, vanadium and iron deposit on inert sorbents during pretreatment of the oils in a fluidized reactor-regenerator system, and catalyze dehydrogenation reactions contributing to excessive coke and gas make. The dehydrogenation activity of the said contaminant metals is suppressed by depositing minor amounts of a bismuth-containing passivating agent on the inert solids, desirably, at 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 consist of mixtures of compounds of bismuth and antimony, and bismuth and tin, with the weight ratio of bismuth to antimony in the range of about 0.01:1 to about 100:1, and weight ratio of bismuth to tin in the range of about 0.01:1 to about 100:1.
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Krishna Ashok S.
Periaswamy Ramamoorthy
Fourson George R.
Garvin Patrick P.
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