METHOD OF EXTRACTING ERBIUM (III) BY EXTRACTION Russian patent published in 2017 - IPC C22B59/00 C22B3/26 

FIELD: chemistry.

SUBSTANCE: invention relates to the extraction of substances by organic extractants from aqueous solutions, in particular to the production of rare earth metals (REM) from poor or technogenic raw materials by extraction. The method for extracting erbium (III) salts involves extraction using isooctyl alcohol as an extractant. Erbium is transported through water in the organic phase in the form of erbium dodecyl sulfate solvate (III). An anionic type surfactant of sodium dodecyl sulfate is used at a concentration corresponding to the stoichiometry of the Er[C₁₂H₂₅OSO₃]_3. Extraction is carried out at pH=3.0-6.0, which makes it possible to achieve 99% recovery of erbium (III) salts from aqueous solutions.

EFFECT: increasing the erbium extraction rate.

1 dwg, 1 ex