Bulk Properties of Di(2-ethylhexyl)phosphoric Acid–Samarium (Europium, Gadolinium) Di(2-ethylhexyl)phosphate–Organic Solvent Solutions

Complexes formed by di(2-ethylhexyl)phosphoric acid (D2EHPA) and lanthanides (Sm, Eu, Gd) are synthesized and characterized. The densities of D2EHPA–samarium (europium, gadolinium) di(2-ethylhexyl)phosphate– n -heptane (toluene, cyclohexane, n -hexane) solutions that form the organic phase in the pr...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2022, Vol.96 (1), p.84-92
Main Authors: Babayan, I. I., Kurdakova, S. V., Kovalenko, N. A., Uspenskaya, I. A.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Cyclohexane
Europium
Gadolinium
Heptanes
Hexanes
Lanthanides
Phosphoric acid
Physical Chemistry
Physical Chemistry of Solutions
Rare earth elements
Samarium
Solvents
Subsystems
Toluene
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Summary:Complexes formed by di(2-ethylhexyl)phosphoric acid (D2EHPA) and lanthanides (Sm, Eu, Gd) are synthesized and characterized. The densities of D2EHPA–samarium (europium, gadolinium) di(2-ethylhexyl)phosphate– n -heptane (toluene, cyclohexane, n -hexane) solutions that form the organic phase in the processes of extraction of rare-earth elements (REE) are measured. It is shown that the Redlich–Kister model allows the bulk properties of the D2EHPA–REE di(2-ethylhexyl)phosphate–organic solvent systems to be described using data for D2EHPA–organic solvent binary subsystems and the density of liquid REE di(2-ethylhexyl)phosphate.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024422010046