Separation and recovery of metal values from natural bitumen...

Details Separation and recovery of metal values from natural bitumen... Separation and recovery of metal values from natural bitumen...

C - Chemistry, Metallurgy

22

B

C22B 3/08 (2006.01) C22B 34/22 (2006.01)

Patent

CA 2117155

High yields of vanadium containing virtually no nickel or magnesium are obtained from natural bitumen ash consisting of up to 5% carbon, more than 95% of water-soluble compounds of vanadium, nickel and magnesium by mixing the ash with water to produce a 20% solids slurry of pH below 6.5 and temperature of 80-85° C oxidizing any reduced vanadium in the slurry and then separating and removing the resulting polyvanadate precipitate from the liquid phase containing substantially all the nickel and magnesium values of the ash.

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