Process using carbonate reagent for recovering vanadium from cokes and ashes derived from heavy oils
AssigneeGulf Canada Limited
InventorLois L. McCorriston
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Abstract
Vanadium values are recovered from sulphur-containing cokes and ashes derived from heavy oils by a novel process comprising heating in the presence of alkali metal carbonate, contacting the resulting solid residue with water to form a leach and recovering the vanadium values dissolved therein. The heating step solubilizes only alkali metal vanadate and thus the leach solution is substantially free of contaminating substances.
Claims9
A process for the recovery of vanadium from a sulphur-containing material of the group consisting of coke derived from hydrocarbonaceous oil and ash obtained from said coke, wherein said hydrocarbonaceous oil is heavy oil, in-situ oil sands bitumen or mineable oil sands bitumen, comprising:
- (a) mixing said material with an alkali metal carbonate reagent in a finely divided form,
- (b) heating the mixture in the presence of an oxidizing atmosphere at an elevated temperature below the fusion point of the reagent,
- (c) contacting the resulting solid residue and water to form a leach solution, and
- (d) recovering the vanadium values from the leach solution, wherein said material comprises vitrified materials and the amount of said alkali metal carbonate is at least twice the combined stoichiometric amount sufficient both to convert the vanadium values present in said material into alkali metal vanadate and to react with the sulphur present in said material, and insufficient to cause the substantial carryover of said alkali metal carbonate into said leach solution.
Dependencies are inferred from the claim text.