METHOD OF EXTRACTING CATIONS Eu FROM WATER-SALT SOLUTIONS Russian patent published in 2015 - IPC C22B59/00 C22B3/26 B03D1/02 C01F17/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of extracting europium (III) cations from a weak or technogenic raw material by liquid extraction. The method of extracting the europium (III) cations includes liquid extraction from water-salt solutions with the application of isooctyl alcohol as an extragent. Before extraction into the water-salt solution added is SAS of an anion type, which is represented by sodium dodecylsulphate, with the formation of europium dodecylsulphate solvate for its transportation through a water and organic phase. Sodium dodecylsulphate is added into the solution in a concentration, corresponding to stoichiometry of a reaction: Eu⁺³+3C₁₂H₂₅OSO₃Na=Eu[C₁₂H₂₅OSO₃]₃+3Na⁺, where Eu⁺³ is the europium cation, C₁₂H₂₅OSO₃Na is sodium dodecylsulphate, Eu[C₁₂H₂₅OSO₃]₃ is the solvate. Liquid extraction is realised at pH=3.0-6.0.

EFFECT: increase of the europium extraction degree due to the formation of strong solvates of europium and extraction of the europium cations from water solutions of its salts.

1 dwg