FIELD: metallurgy.
SUBSTANCE: method for removing molybdenum from tungsten-containing solutions is performed by means of a complexing method by introduction to the solution of water-soluble polyelectrolyte of cationic type at the weight ratio of molybdenum : polyelectrolyte, which is equal to 2:1-2:3, and by passing through a semi-permeable membrane of the formed solution having pH value of 10-12 so that tungsten-containing filtrate is obtained, in which molybdenum-to-tungsten ratio is less than 5 wt %.
EFFECT: improved ultrafiltration properties, high cleaning of molybdenum from tungsten, improved technical and economic indices of membrane separation of molybdenum and tungsten in water solutions.
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