EXTRACTION OF MOLYBDENUM FROM AQUEOUS SOLUTIONS OF TUNGSTATES Russian patent published in 2002 - IPC

Abstract RU 2181782 C1

FIELD: extraction of substances; applicable in ferrous and nonferrous metallurgy, and in treatment of industrial and household sewages. SUBSTANCE: method of recovery of molybdenum from acid peroxide solutions of tungstates is realized by extraction with mixture of trialkylamine and isooctyl alcohol in kerosene. Molybdenum is extracted from solutions of tungstates with molar ratio of Mo: W ≤ 1:100 at pH O, volume ratio of aqueous and organic phases W: 0=2.5-4.0; molar ratio of H₂O₂: (W+Mo)=1-2; molar ratio of trialkylamine: isooctyl alcohol: Mo:W=1:2:(0.04-0.06):(0.2-0.3). To prevent quick precipitation of tungstic acid from acid peroxide solutions, particularly with high content of molybdenum and molar ratio of Mo:W ≥ 1:100, extraction is carried out with ascorbic acid taken in molar ratio of ascorbic acid: Mo=1:1. EFFECT: recovered molybdenum from aqueous solutions of tungstates by extraction with use of low-cost and efficient extracting agent. 3 cl, 2 dwg, 3 tbl, 2 ex

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RU 2 181 782 C1

Authors

Voropanova L.A.

Chernikhevich N.G.

Dates

2002-04-27—Published

2000-10-06—Filed