Reducing metal content of oil feeds
AssigneeExxon Research & Engineering Co.
InventorsRoby Bearden, Gordon F. Stuntz
Life of this patent
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Abstract
A method for reducing the concentration of metal contaminants, such as vanadium and nickel, in the distillate from a petroleum fraction is disclosed. The method comprises contacting the petroleum fraction in a contacting zone with an effective amount of sulfur dioxide of a sulfur dioxide precursor at a temperature ranging between about 200.degree. C. and 450.degree. C. for a period of time ranging between about 0.01 and 5 hours after which the fraction is passed to a vacuum separation zone and separated into a distillate having a relatively low metals content and a bottoms having a relatively high metals content.
Claims16
A method for reducing the metal contaminant concentration in distillate derived by processing a bottoms fraction from an atmospheric separation where the bottoms fraction contains metal contaminant, said method comprising:
- A. passing the bottoms fraction into a contacting zone maintained at a temperature ranging between about 200.degree. C. and about 450.degree. C. and contacting the bottoms fraction therein with one or more metal devolatilization agents selected from the group consisting of vapor phase sulfur dioxide and precursors of vapor phase sulfur dioxide so that the concentration of sulfur dioxide in the contacting zone ranges from about 0.5 to about 5.0 wt.% of the bottoms fraction;
- and
- B. passing the bottoms fraction from the contacting zone into a vacuum separation zone wherein the bottoms fraction containing the metal contaminant is separated into a distillate having a relatively low metal contaminant concentration and a bottoms having a relatively high metal contaminant concentration.
A method for reducing the concentration of nickel and vanadium in distillate derived by processing a bottoms fraction from an atmospheric separation where the bottoms fraction contains nickel and vanadium, said method comprising:
- A. passing the bottoms fraction into a contacting zone maintained at a temperature ranging between about 200.degree. C. and about 450.degree. C. and contacting the bottoms fraction therein with about 0.5 to about 5.0 weight percent vapor phase sulfur dioxide, based upon the weight of the bottoms fraction for a period of time ranging between about 0.01 and about 5 hours;
- and
- B. thereafter passing the bottoms fraction into a vacuum separation zone wherein the petroleum fraction is separated into a distillate having a relatively low concentration of nickel and vanadium and a bottoms having a relatively high nickel and vanadium concentration.
Dependencies are inferred from the claim text.