Dearsenating of shale oil with metal chlorates
AssigneePhillips Petroleum Company
InventorPaul R. Stapp
Life of this patent
Estimating the term…
Abstract
Arsenic impurities and, optionally, iron impurities are removed from a hydrocarbon-containing feed stream, preferably shale oil, by contacting it with an aqueous solution of a metal chlorate and an acid having a pKa of less than 3.
Claims25
A process for removing at least a portion of arsenic impurities from a hydrocarbon-containing feed stream, which contains arsenic impurities, comprising the step (A) of contacting said feed stream with an aqueous extractant, which comprises (a) at least one substantially dissolved metal chlorate, and (b) at least one acid having a pKa of less than 3, under suitable dearsenating conditions so as to produce a hydrocarbon-containing stream having a reduced level of arsenic.
A process for reducing the arsenic content of an arsenic-containing hydrocarbon feed stream, said process comprising:
- (A) contacting said feed stream with an aqueous extractant, which contains (a) at least one substantially dissolved metal chlorate and (b) at least one substantially dissolved acid having a pKa of less than 3, to form an intimate two-phase liquid mixture,
- (B) separating said two-phase liquid mixture first into a hydrocarbon material having reduced arsenic content (as compared to said hydrocarbon feed stream) and an aqueous stream, and then
- (C) recovering said hydrocarbon material having a reduced arsenic content.
Dependencies are inferred from the claim text.