Process for removing arsenic from hydrocarbons
AssigneeUnion Oil Company of California
InventorDean Arthur Young
Life of this patent
Estimating the term…
Abstract
A process for removing arsenic from a mineral oil feedstock containing at least 2 ppmw arsenic comprises contacting said feedstock at elevated temperatures with a catalytic absorbent comprising a nickel sulfide and a molybdenum sulfide composited with a refractory oxide, said nickel sulfide and said refractory oxide each being present in relatively large proportions. Under preferred conditions a product oil stream containing less than 2 ppmw arsenic is continuously obtained from said contacting until a weight of arsenic at least equivalent to that of the nickel in the catalytic absorbent has been absorbed thereon.
Claims27
A process comprising:
- a. contacting a hydrocarbon feedstock containing at least 2 ppmw arsenic at elevated temperatures with a catalytic absorbent comprising between about 30 and 70 wt.% of one or more nickel components (as NiO) and 2 and 20 wt.% of one or more molybdenum components (as MoO.sub.3) composited with a refractory oxide, said nickel and molybdenum components comprising a nickel sulfide and a molybdenum sulfide, until a weight of arsenic at least equal to the weight of nickel in the catalytic absorbent has been absorbed thereon;
- and
- b. withdrawing from said contacting a product oil stream containing arsenic in a lower concentration than said feedstock.
A process comprising:
- a. contacting a hydrocarbon feedstock containing at least 20 ppmw arsenic at elevated temperatures with a catalytic absorsent comprising between about 30 and 70 wt.% of one or more nickel components (as NiO) and 2 and 20 wt.% of one or more molybdenum components (as MoO.sub.3) composited with a refractory oxide, said nickel and molybdenum components comprising a nickel sulfide and a molybdenum sulfide, until a weight of arsenic at least equivalent to the weight of nickel in the catalytic absorbent has been absorbed thereon;
- and
- b. withdrawing from said contacting a product oil stream containing less than 6 ppmw arsenic.
A process comprising:
- a. contacting a hydrocarbon feedstock containing at least 2 ppmw arsenic at elevated temperatures with a catalytic absorbent comprising between about 30 and 70 wt.% of one or more nickel components (as NiO) and 2 and 20 wt.% of one or more molybdenum components (as MoO.sub.3) composited with a refractory oxide, said nickel and molybdenum components comprising a nickel sulfide and a molybdenum sulfide, said contacting being carried out in the presence of an atmosphere consisting essentially of one or more components selected from the class consisting of inert gases, light hydrocarbon gases, and carbon dioxide;
- and
- b. withdrawing from said contacting a product oil stream containing arsenic in a lower concentration than said feedstock.
A process comprising:
- a. contacting a hydrocarbon feedstock containing at least 200 ppmw arsenic at elevated temperatures with a catalytic absorbent comprising between about 30 and 70 wt.% of one or more nickel components (as NiO) and 2 and 20 wt.% of one or more molybdenum components (as MoO.sub.3) composited with a refractory oxide, said nickel and molybdenum components comprising a nickel sulfide and a molybdenum sulfide;
- and
- b. withdrawing from said contacting a product oil stream containing less than 5 ppmw arsenic.
Dependencies are inferred from the claim text.