METHOD OF RECOVERING VANADIUM FROM SOLUTIONS Russian patent published in 2005 - IPC

FIELD: hydro metallurgy.

SUBSTANCE: method comprises mixing vanadium-containing soda or other alkali solution with monoatomic alcohol, e.g. ethyl alcohol, to achieve alcohol concentration ≥ 25 vol % and settling the mixture for 2.5-3 min to separate it into two phases: bottom (heavy) and upper (light-weight) phases. The former contains 99% of the total amount of vanadium and the latter concentrated soda. Bottom phase is washed and dried to give sodium vanadate, which may be used either as reagent in melting operation to produce ferrovanadium or processed according to known technologies to produce any other vanadium compound. Alcohol is regenerated by heating mother liquor (upper phase). Mother liquor, after adjusting alkali concentration, is used for leaching next fresh portion of vanadium-containing material, for example metallurgical slag.

EFFECT: simplified process due to reduced number of process operations, increased (by 5%) degree of vanadium recovery, enabled regeneration of single reagent, and improved environmental condition.

2 cl, 2 tbl