EXTRACTION OF MEDIUM-HEAVY REE GROUP WITH AN EXTRACTANT BASED ON CYANEX 272 AND P507

Abstract

Distribution coefficients and separation factors of rare earth elements (REE) were determined during extraction with an extractant based on Cyanex 272 and P507 in a diluent of 15% isooctanol in isopar L. Aqueous solutions of medium-heavy lanthanide chlorides were studied at their concentration in a solution of 0.05-0.9 g/dm3. A series of experiments were carried out with the concentration of the extractant in a diluent of 10, 20, 30 and 40 wt.%. Based on the data obtained, extraction isotherms were constructed, as well as graphical dependences of the distribution coefficients and separation factors