SEPARATION AND RECOVERY OF METAL VALUES FROM NATURAL BITUMEN ASH

摘要

High yields of vanadium containing virtually no nickel ormagnesium are obtained from natural bitumen ash consisting of up to5% 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 oxidizingany reduced vanadium in the slurry and then separating and removingthe resulting polyvanadate precipitate from the liquid phasecontaining substantially all the nickel and magnesium values of theash.