METHOD OF EXTRACTING LUTETIUM (III) FROM SOLUTIONS OF SALTS Russian patent published in 2019 - IPC C22B59/00 C22B60/00 C22B3/26 

FIELD: chemistry.

SUBSTANCE: invention relates to enrichment, in particular, to methods for obtaining rare-earth metals (REM) or oxides thereof from poor or technogenic raw material using a flotation extraction method. Method of extracting lutetium (III) from salt solutions involves floatation extraction using an organic phase and a collector. Organic phase used is isooctyl alcohol, and as a collector, an anionic surfactant of sodium dodecyl sulphate is used in a concentration corresponding to the stoichiometry of the reaction Lu⁺³ + 3DS^-= Lu[DS]₃, where Lu⁺³- lutetium cation, DS^- - dodecyl sulphate ion. Floatextraction is carried out at pH not more than 7.9 and ratio of organic and aqueous phases of 1:20.

EFFECT: method increases degree of lutetium extraction.

1 cl, 1 dwg, 2 tbl