Extraction of REE(III) with Mixtures of 2,4,6-tris(Diarylphosphoryl)-1,3,5-triazines and Picrolonic Acid
A. N. Turanova, V. K. Karandashevb, O. I. Artyushinc,
E. V. Smirnovac, *, G. V. Bodrinc, and V. K. Brelc
a Osipyan Institute of Solid-State Physics, Russian Academy of Sciences,
Chernogolovka, Moscow oblast, 142432 Russia
b Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences,
Chernogolovka, Moscow oblast, 142432 Russia
c Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences,
Moscow, 119991 Russia
Correspondence to: *e-mail: matveeva@gmail.com
Received 9 December, 2022
Abstract—Considerable synergetic effect has been revealed on extraction of REE(III) ions from chloride solutions with mixtures of picrolonic acid and tris(diarylphosphoryl)-1,3,5-triazines in 1,2-dichloroethane due to formation of hydrophobic mixed-ligand REE(III) complexes. Parameters of extraction equilibrium and stoichiometry of resulting complexes have been determined. Effect of aqueous phase composition, organic solvent nature, and extractant structure has been studied. The largest synergetic effect has been observed in the system with tris(ditolylphosphoryl)-1,3,5-triazine.
Keywords: REE(III), extraction, picrolonic acid, tris(diarylphosphoryl)-1,3,5-triazines, synergism
DOI: 10.1134/S003602362360034X