Preparation and Evaluation of High-Purity La2O3

Lee, Gwang Seop; Uchikoshi, Masahito; Mimura, Kouji; Isshiki, Minoru

doi:10.1007/s11663-010-9348-6

Cited by 7 publications

(7 citation statements)

References 44 publications

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“…The preference of Ln 3+ relative to Fe 3+ or Al 3+ for monomeric Hdehp coordination can be evaluated by the ion exchange results of Hdehp-impregnated resin in the literature. 23 The selectivity order is La 3+ < Ce 3+ < Al 3+ < Sm 3+ < Fe 3+ , which correlates well with the present result of [Al(dehp) 3 ] and partly with the result of [Fe(dehp) 3 ]. Unfortunately, the K d values of Dy 3+ and Yb 3+ were not reported in the literature.…”

Section: Table 1 Distribution Coefficients and Separation Factors On ...supporting

confidence: 88%

Lanthanide ion exchange properties of a coordination polymer consisting of di(2-ethylhexyl) phosphoric acid and trivalent metal ions (Ce3+, Fe3+, or Al3+)

et al. 2014

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Three kinds of coordination polymers ([M(dehp)3], M = Ce, Fe, or Al) were prepared by mixing the sodium form (Na(dehp)) of di(2-ethylhexyl) phosphoric acid and MCl3 in an ethanol-water binary mixture. They have monoclinic crystalline structure with similar lattice parameters. The lanthanide ion (Ln(3+) = La(3+), Sm(3+), Dy(3+), or Yb(3+)) exchange properties were studied in a 20 : 80 vol% ethanol-water binary mixture containing 2 mM Ln(NO3)3 at room temperature. The rate of Ln(3+) adsorption is relatively slow; it requires over 3 weeks to reach equilibrium. [M(dehp)3] has different Ln(3+) affinities depending on the kind of central metal ions: the affinity order at 3 week adsorption is Yb(3+) < La(3+) < Dy(3+) < Sm(3+) for [Ce(dehp)3], La(3+) < Sm(3+) < Dy(3+) < Yb(3+) for [Fe(dehp)3], and La(3+) < Sm(3+), Dy(3+), Yb(3+) for [Al(dehp)3]. The difference in affinity order can be explained by two factors: the coordination preference and steric strain caused by the polymeric structure. The chemical and structural analyses suggested that the Ln(3+) adsorption progresses first by the central M(3+)/Ln(3+) exchange, followed by a morphological change to a rod-like or fibrous form by a solid phase reaction. In the case of [Fe(dehp)3], the eluted Fe(3+) may be hydrolyzed and precipitated as amorphous iron hydroxide.

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Section: Table 1 Distribution Coefficients and Separation Factors On ...supporting

confidence: 88%

Lanthanide ion exchange properties of a coordination polymer consisting of di(2-ethylhexyl) phosphoric acid and trivalent metal ions (Ce3+, Fe3+, or Al3+)

et al. 2014

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“…(Lee et al, 2009(Lee et al, , 2010b. The same adsorbent was used, followed by anion exchange and oxalate precipitation to obtain La 2 O 3 of more than 99.9998% purity (Lee et al, 2010a). Amberlite XAD-7 coated with β-glycerophosphate had q m of 33.8 mg/g for La (Gabor et al, 2016).…”

Section: Organic Polymer-based Supportsmentioning

confidence: 99%

Adsorption-based Separation and Recovery of Rare Earth Elements

Patel¹,

Karamalidis²

2023

Preprint

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“…The Eu(III) extraction from HNO 3 solutions by resins impregnated with a dual-extractant is described in [47]. Moreover, D2EHPA and PC-88A also have advantages of high separation efficiency for REEs [94,95]. Lee et al [96] compared the sorption of REEs on Cyanex 923-, D2EHPA-, and PC88A-impregnated resins and found that D2EHPA-impregnated resins are the most appropriate ones for the separation of Ce, Pr, Nd, and Sm from La for their strong adsorption ability and high separation factors.…”

Section: Rare Earth Elementsmentioning

confidence: 99%

“…The separation of metals is generally achieved by column experiments, and the selectivity factor by SIRs may be controlled by the feed concentration [142], feed pH [89], flow rate [138], support property [66], eluent [92,95], extractant composition [52], preparation method [54], as well as by the column size [94].…”

Section: Equilibrium and Thermodynamics Of Metal Sorption On Sirsmentioning

confidence: 99%

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

et al. 2016

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The recovery and separation of metals from aqueous solutions is one of the research hotspots in hydrometallurgy, environment protection, analytical chemistry, etc. Much attention has been paid to solvent-impregnated resins (SIRs) since these were firstly proposed for the extraction of metals. SIRs are characterized by high efficiency and selectivity, convenient preparation, and easy operation because they combine the unique advantages of solvent extraction and ion exchange. The preparation and features of SIRs are summarized and their applications in the extraction of various metals from solutions are reviewed. In addition, the equilibrium, thermodynamics, and sorption kinetics of the metals onto SIRs are elucidated in detail.

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Preparation and Evaluation of High-Purity La2O3

Cited by 7 publications

References 44 publications

Lanthanide ion exchange properties of a coordination polymer consisting of di(2-ethylhexyl) phosphoric acid and trivalent metal ions (Ce3+, Fe3+, or Al3+)

Lanthanide ion exchange properties of a coordination polymer consisting of di(2-ethylhexyl) phosphoric acid and trivalent metal ions (Ce3+, Fe3+, or Al3+)

Adsorption-based Separation and Recovery of Rare Earth Elements

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

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