C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
53/146, 53/289
C01G 39/00 (2006.01) C01G 3/00 (2006.01) C22B 3/00 (2006.01) C22B 3/28 (2006.01) C22B 3/30 (2006.01) C22B 34/34 (2006.01)
Patent
CA 1220628
ABSTRACT OF DISCLOSURE A hydrometallurgical process is provided for the recovery of molybdenum values from a molybdenum disulfide concentrate containing copper. The process comprises forming an aqueous slurry of finely divided molybdenum concentrate with an alkali metal compound selected from the group consisting of carbonates and hydroxides of alkali metals, and pressure leaching the slurry in the presence of oxygen at an elevated temperature and pressure for a time sufficient to effect conversion of the contained molybdenum values to alkali metal molybdate and provide a residue containing copper oxide or basic copper carbonate from which copper is later recovered. The molybdenum values are recovered from solution by solvent extraction and the solvent thereafter stripped of the molybdenum as ammonium molybde- num using ammonium hydroxide. The molybdenum is recovered as crystals of ammonium molybdate by crystallization, e.g., by evaporating the stripping solution.
446697
Bruno John D.
Huggins Dale K.
Laferty John M.
Amax Inc.
Smart & Biggar
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