METHOD OF RECOVERING MOLYBDENUM FROM SOLUTIONS Russian patent published in 2002 - IPC

FIELD: nonferrous hydrometallurgy. SUBSTANCE: molybdenum recovery in Mo(IV) anionic form envisages flotation of molybdate anions by means of cationic collector containing, as active part, mixture of branched primary amines, to which organic solvent is added in amounts corresponding to 0.04-0.05 cu. m per 1 kg molybdenum. Flotation is carried out at pH 3.6-3.9. Resulting foamed product is separated into aqueous and organic phases. The latter is treated with aqueous ammonia solution at pH 11.0-12.0 and 40-50 C followed by separation of aqueous and organic phases. Amines are thereby regenerated in the form of organic solution and reextract in the form of aqueous ammonium molybdate solution is obtained, which is further crystallized into the form of commercial product. Organic solvent is a mixture of kerosene and nonyl alcohol at volume ratio 9:1. EFFECT: increased recovery of molybdenum into commercial product, enabled regeneration of collector amines, and suppressed tackiness of foamed product. 2 cl, 2 tbl