The first amorphous and crystalline yttrium lactate: synthesis and structural features

Yapryntsev, A. D.; Baranchikov, А. Е.; Churakov, Andrei V.; Kopitsa, G. P.; Silvestrova, A. A.; Golikova, M. V.; Иванова, О. С.; Gorshkova, Yu. E.; Иванов, В. К.

doi:10.1039/d1ra05923h

Cited by 6 publications

(6 citation statements)

References 78 publications

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“…It is appropriate to present the synthesis and crystal structure of the primary molecular complex of yttrium-lactate, Y(Lac)3(H2O)2, in which the yttrium coordination sphere is immersed with lactate ligands and water particles, coming about within the formation a unbiased linkage [46,47]. The reaction of yttrium chloride with lactic acid produces a white precipitate of yttrium lactate and represented in the Eq.…”

Section: Y2o3 Productionmentioning

confidence: 99%

“…By increasing the contact time to 11 min., the extraction efficiency of dysprosium showed negligible effect to 99.2 %. This may be due to the fact that the transfer of dysprosium ion from the aqueous phase to the organic phase is saturated to form a complex at equilibrium [46]. Therefore, a contact time of 9 min., was considered the optimal value for the extraction of Dy from the leach liquor.…”

Section: Effect Of Contact Timementioning

confidence: 99%

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"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

El Hady

2024

Arab Journal of Nuclear Sciences and Applications

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The separation of ytrrium and dysprosium from the REEs product (48.15% Y2O3, 11.05% Dy2O3) obtained from a xenotime mineral concentrate was studied. The REEs chloride liquor is prepared followed by precipitation of yttrium using lactic acid. The optimum conditions of the yttrium precipitation included 2 M lactic acid concentration, lactic acid pH 5 with L(REEs solution) /L(lactic acid) 1/0.75 at contact time of 168 h at 25 o C. The extraction of dysprosium from Y-free REE chloride solution was investigated using PC88A (2-Ethylhexyl 2-ethylhexy phosphonic acid). The optimal conditions of the dysprosium extraction were an extractant concentration of 2.2 M, 1/1 O/A ratio in a chloride solution at pH 3, and 9 min., as contact time. While the optimal conditions of its stripping considered 1.5 M H2SO4 in 1/1 O/A ratio for 20 min., as stripping time. Ultrapure products of Y and Dy were prepared and analyzed using ICP-MS.

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Section: Y2o3 Productionmentioning

confidence: 99%

Section: Effect Of Contact Timementioning

confidence: 99%

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

El Hady

2024

Arab Journal of Nuclear Sciences and Applications

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“…Among RE lactates, only a few compounds have been synthesized and characterized to date. Namely, crystal structures of 2D-layered cationic {[Ln(H 2 O) 2 Lact 2 ](ClO 4 )} ∞ (Ln = Eu, Tb) [42,43] and molecular [Y(H 2 O) 2 Lact 3 ] [44] compounds as well as mixed-ligand complexes of RE (L/D)-lactates with O-and N-donor ligands [45][46][47] have been reported. The main obstacle to the structural study of RE lactates lies in their tendency to form viscous supersaturated solutions or/and intergrown crystals rather than X-ray quality single crystals.…”

Section: Introductionmentioning

confidence: 99%

“…This feature can be illustrated on yttrium complexes with propionate and lactate ligands, which possess the same carbon chain structure while differing in the presence of an additional OH-group. Thus, yttrium propionate possesses a 2D-layered motif [18,48], whereas yttrium lactate exhibits a mononuclear structure, which is rather rare for RE carboxylates [44].…”

Section: Introductionmentioning

confidence: 99%

Diverse Coordination Chemistry of the Whole Series Rare-Earth L-Lactates: Synthetic Features, Crystal Structure, and Application in Chemical Solution Deposition of Ln2O3 Thin Films

Gashigullin,

Kendin,

Martynova

et al. 2023

Molecules

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Rare-earth (RE, Ln) carboxylates are widely studied as precursors of RE oxide-based nanomaterials; however, no systematic studies of RE L-lactates (HLact = 2-hydroxypropanoic acid) have been reported to date. In the present work, a profound structural investigation of RE L-lactates is carried out. A family of RE lactate complexes of the general formula LnLact3∙nH2O (Ln = La, Ce–Nd, Sm–Lu, Y; n = 2–3) are synthesized and characterized by CHN, TGA, and FTIR as well as by powder and single-crystal XRD methods.The existence of four novel structural types (1-Ln–4-Ln) is revealed. Compounds of the 1-Ln type (Ln = La, Ce, Pr) exhibit a chain polymeric structure, whereas 2-Ln–4-Ln compounds are molecular crystals consisting of dimeric (2-Ln; Ln = La, Ce–Nd) or monomeric (3-Ln–Ln = Sm–Lu, Y; 4-Ln–Ln = Sm–Gd, Y) species. The crystal structures of 1-Ln–4-Ln compounds are discussed in terms of their coordination geometry and supramolecular arrangement. Solutions of yttrium and lanthanum lactates with diethylenetriamine are applied for the chemical deposition of Y2O3 and La2O3 thin films.

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“…1 -6. From the latter, yttrium is extracted by three diverse strategies; direct precipitation (15,16) , ion exchange resin (17)(18)(19) and solvent extraction (20,21). (5)…”

mentioning

confidence: 99%

Solvent Extraction of Yttrium from Rare Earths Concentrate Using Cyanex 272 and PC88A

El Hady

2024

Bulletin of Faculty of Science, Zagazig University

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The recovery of yttrium using cyanex 272 & PC88A from the REEs concentrate which produced from xenotime-bearing ferruginous sandstone, southwestern Sinai was studied. Cyanex 272 solvent is known as a purified bis(2.4.4-trimethylpentyl) phosphinic acid and PC88A solvent is also known as a purified 2-Ethylhexyl 2-ethylhexy phosphonic acid (HEHEHP). From a solution of rare earths chloride that prepared, the optimum conditions for yttrium extraction included mixture of 1.4 M cyanex 272 & 1.8 M PC88A / 0.25 M isodecanol in kerosene, 1/1 O/A ratio, the prepared liquor pH 3 and contact time 12 min. The decided optimum conditions of yttrium stripping are 3 M HNO3 in 1/1 O/A ratio for contact time 25 min. McCabe-Thiele diagram for yttrium extraction and stripping are created. Very pure product of yttrium was prepared and analyzed using ICP-MS.

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The first amorphous and crystalline yttrium lactate: synthesis and structural features

Abstract: The synthesis and crystal structure of the first molecular yttrium lactate complex, Y(Lac)3(H2O)2, is reported, where the coordination sphere of yttrium is saturated with lactate ligands and water molecules, resulting in a neutral moiety.

Cited by 6 publications

References 78 publications

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

Diverse Coordination Chemistry of the Whole Series Rare-Earth L-Lactates: Synthetic Features, Crystal Structure, and Application in Chemical Solution Deposition of Ln2O3 Thin Films

Solvent Extraction of Yttrium from Rare Earths Concentrate Using Cyanex 272 and PC88A

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