Low or no slag molten metal processing of coke containing vanadium and sulfur
AssigneesMarathon Ashland Petroleum LLC, Envires LLC
InventorsThomas C. Holcombe, Donald P. Malone
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Abstract
A process for recovering and purifying vanadium found in petroleum coke is disclosed. Coke containing V and sulfur is charged to a molten metal bath and dissolved to form a molten metal bath with dissolved carbon, dissolved V metal and dissolved sulfur. At least a majority of the dissolved sulfur is released as H2S by maintaining reducing conditions in the bed, by maintaining a high concentration of dissolved carbon or addition of steam or hydrogen rich hydrocarbon such as methane or some combination of these approaches.
Claims11
A process for treating a coke containing vanadium and sulfur comprising the steps:
- dissolving coke containing both V and sulfur in a molten metal bath to produce a molten metal bath containing dissolved carbon, dissolved vanadium and dissolved elemental sulfur;
- adding to said bath an oxygen containing gas in an amount sufficient to oxidize the net carbon input to said bath and produce heat, but controlling the amount of carbon and oxygen in said bath to maintain reducing conditions in said bath;
- and at least periodically adding to said bath a reducing gas and removing at least a majority of said dissolved sulfur as hydrogen sulfide from said molten metal bath as a product of the process.
Dependencies are inferred from the claim text.