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Molybdenum Hydrometallurgy (2 replies)

5 months ago
Bhaduri 5 months ago

What is the optimal pH & temp to precipitate molybdic acid (MoO3.H2O) from an ammoniacal molybdate solution (assume 100's ppm elemental contaminants's such as soluble V & Ni & significant ammonium sulfate...100-gpL+) using conc H2SO4 or HNO3? The precipitate must be free of polymeric molybdate species.

Bob Mathias
5 months ago
Bob Mathias 5 months ago
1 like by Oberstorm

Hi, have you searched this Extractive Metallurgy of Molybdenum handbook?

Jorge Ganoza
5 months ago
Jorge Ganoza 5 months ago

Try pH 0.9. Molydic acid is not very soluble in water (@ 2.1 g/L at 15 oC). I think you should use nitric acid. The temperature could be 45 to 50 oC. 

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