METHOD OF EXTRACTING Gd (3+) CATIONS BY SODIUM DODECYLSULFATE Russian patent published in 2019 - IPC C22B59/00 C22B3/26 B03D1/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to methods of producing rare-earth metals (REM) or oxides thereof from a poor or technogenic raw material using an ion flotation technique. Ion flotation process is carried out in a laboratory flotation machine of mechanical type 137 V-FL. For extraction of Gd (3+) cations, an aqueous solution of Gd (3+) nitrate with concentration of 10^-3 mol/l. Surfactant used is sodium dodecylsulfate, the concentration of which corresponds to the stoichiometry of the reaction Me⁺³+3NaDS=Me[DS]₃+3Na⁺, where Me⁺³ – cation Gd (3+), DS^- –ion dodecylsulfate. As a result of the process of ion flotation, the foam product obtained by breaking foam with 1 M sulfuric acid and the chamber residue are analyzed for content of Gd (3+) cations.

EFFECT: high degree of extraction of Gd (3+) to 99½ % and achieving maximum extraction pH.

1 cl, 2 dwg, 3 tbl