Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Patent
1980-11-10
1981-10-20
Carter, Herbert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
423 61, 75103, 75121, C01G 3900
Patent
active
042960770
ABSTRACT:
A process for the recovery of molybdenum values from leach muds of molybdenite concentrates which have been roasted in air to convert molybdenum sulfide to molybdenum trioxide and subsequently leached with an aqueous alkaline solution for the recovery of soluble molybdenum salts. Leach mud is treated by the process of this invention by repulping the leach mud with aqueous ammonium hydroxide under pressure, at a temperature in the range of about 50 to 150.degree. C. for a period of 2 or more hours after which undissolved solid material is separated from the ammoniacal leach solution and repulped with an aqueous caustic leach solution at a temperature in the range of 50.degree. to 150.degree. C. for a period of 2 to 4 hours. Undissolved solid material is separated from the caustic leach solution and both the ammoniacal and the caustic leach solutions processed for the recovery of molybdenum salts therefrom.
REFERENCES:
patent: 3196004 (1965-07-01), Kunda
patent: 3848049 (1974-11-01), Ronzio et al.
patent: 3957946 (1976-05-01), Ronzio et al.
Heuer Steven R.
Zbranek Zdenka
Carter Herbert T.
Engelhard Min. & Chem. Corp.
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