New Sustainable Solvent Extraction Pathways for Rare Earth Metals via Oximes Molecules

Simple item page
creativework.keywordsEPR, extraction, ionic liquids, lanthanoids, oximes, selectivity, synergism
creativework.publisherMultidisciplinary Digital Publishing Institute (MDPI)en
dc.contributor.authorAtanassova M.
dc.contributor.authorKukeva R.
dc.contributor.authorKurteva V.
dc.date.accessioned2024-07-10T14:27:06Z
dc.date.accessioned2024-07-10T14:51:04Z
dc.date.available2024-07-10T14:27:06Z
dc.date.available2024-07-10T14:51:04Z
dc.date.issued2023-11-01
dc.description.abstractA study on the synergistic extraction of Eu(III) ions with a series of chelating ligands and determination of the process parameters is presented by employing ionic liquids and typical organic diluents. The investigations of the liquid–liquid extraction, commonly applied in the separation science of 4f and 5f-ions acidic chelating compounds, 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP), 4-benzoyl-3-phenyl-5-isoxazolone (HPBI), and 2-thenoyltrifluoroacetone (HTTA) alone and in combination with two synergistic agents, meso-hexamethylpropyleneamine oxime (S2: HM-PAO) and its bis-imine precursor (S1: pre-HM-PAO), are presented. The interaction between the two extractants (acidic/neutral) in deuterochloroform was studied using 1H, 13C, and 1H-1H NOESY experiments. Several conclusions are given highlighting the role of the ionic diluent in complexation processes and selectivity with an employment of the two synergistic agents for various metal s-, p-, d-, and f-cations in the Periodic table, with almost 25 metal ions. The objective was to optimize a system for 4f-ions solvent extraction based on the new oxime molecules with β-diketone/isoxazolone/pyrazolone partnership. As detailed above, slight enhancements of extraction efficiencies were obtained either by using basic synergistic agents such as HM-PAO and/or using pre-HM-PAO. A competitive solvent extraction test of nearly 18 f-ions by various ligands (HTTA, S1, S2, and HPBI) and the two mixtures HTTA−S1 and HTTA−S2 diluted in ILs or organic diluents was also conducted in order to evaluate the switchable diluent impact. Additionally, electron paramagnetic resonance (EPR) spectroscopy was used to study the established chemical species with Cu2+ cations in the obtained organic extracts involving the two synergistic molecules.
dc.identifier.doi10.3390/molecules28227467
dc.identifier.issn1420-3049
dc.identifier.scopusSCOPUS_ID:85177732547en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/883
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85177732547&origin=inward
dc.titleNew Sustainable Solvent Extraction Pathways for Rare Earth Metals via Oximes Molecules
dc.typeArticle
oaire.citation.issue22
oaire.citation.volume28
Files
Collections
Articles