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 inRussian Journal of Physical Chemistry A Vol. 96; no. 1; pp. 84 - 92
Main Authors Babayan, I. I., Kurdakova, S. V., Kovalenko, N. A., Uspenskaya, I. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2022
Springer Nature B.V
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
solvent
density
lanthanide di(2-ethylhexyl)phosphate
di(2-ethylhexyl)phosphoric acid
Redlich–Kister model
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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