Recovery of molybdenum from molybdenum disulfide

Details Recovery of molybdenum from molybdenum disulfide Recovery of molybdenum from molybdenum disulfide

1985-08-22

1986-07-08

Carter, H. T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423 55, 423 61, 423593, 544181, C01G 3902

Patent

active

045992240

ABSTRACT:
A process is disclosed for recovering molybdenum from molybdenum disulfide. The process involves forming a slurry of the molybdenum disulfide in a solution of an alkali metal hydroxide, the amount of hydroxide being sufficient to react with at least a portion of the molybdenum disulfide to form an alkali metal molybdate and an alkali sulfate, heating the slurry in an oxidizing atmosphere at an elevated temperature and pressure and for a sufficient time to effect the conversion to the molybdate, and separating the pregnant liquor containing the molybdate from any residue. To the pregnant liquor is then added a sufficient amount of a hexamine to form a hexamine-molybdenum compound containing the major portion of the molybdenum, followed by adjusting the pH to from about 1.5 to about 3.8 to precipitate the major portion of the hexamine-molybdenum compound, and separating the compound from the resulting mother liquor.

REFERENCES:
patent: 4165362 (1979-08-01), Reynolds
patent: 4217292 (1980-08-01), Kroenke
patent: 4266051 (1981-05-01), Kroenke
Dresher et al., "Journal of Metals," Jun. 1956, pp. 794-800.

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