Union Carbide Corporation

U.S. Vanadium Corporation

Umetco Minerals Corporation

Harry E Gardner

A process is provided for the recovery of vanadium and nickel values from petroleum residues and, in particular, from Flexicoke. In the process, Flexicoke is blended with an alkali metal source, such as sodium sulfate or sodium carbonate, and then roasted in an oxygen-containing gas until carbon is removed and a fused mixture is obtained. Thereafter, the vanadium is leached from the mixture with an aqueous solution, and nickel is contained in solids remaining from the leaching.

Recovery of vanadium and nickel from petroleum residues

A process is provided for the production of vanadyl hydrate including solvent extraction and stripping steps. The vanadyl hydrate is then reacted with carbon to produce vanadium carbide.

Process for the production of vanadium carbide

Process for the production of vanadyl hydrate

Molybdenum is removed from a uranium bearing alkaline carbonate leach solution, by adding a compound which provides lead ion to react with the molybdenum present to form insoluble lead molybdate (PbMoO.sub.4) which precipitates from the solution.

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Grand Junction, CO, United States of America

Harry E Gardner