Effect of complexing agent lactic acid on the extraction and separation of Pr(III)/Ce(III) with di-(2-ethylhexyl) phosphoric acid

Yin, Shenghua; Wu, Wenyuan; Bian, Xue; Zhang, Fengyun

doi:10.1016/j.hydromet.2012.11.005

Cited by 61 publications

(24 citation statements)

References 10 publications

(10 reference statements)

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“…Among the extractants, di(2‐ethylhexyl)phosphoric acid (HDEHP, P204) and 2‐ethyl(hexyl) phosphonic acid mono‐2‐ethylhexyl ester (HEH[EHP], P507) are two of the most commonly used extractants. Up until now, much of the research concerning HDEHP and HEH[EHP] for REEs separation has been reported on hydrometallurgy and nuclear fuel recycling . As can be seen in Figure , there are two ester groups in HDEHP, and there is only one ester group in HEH[EHP].…”

Section: Introductionmentioning

confidence: 99%

The adjustable synergistic effects between acid–base coupling bifunctional ionic liquid extractants for rare earth separation

Sun

Waters

2014

AIChE Journal

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Two of the most widely used industrial extractants for rare earth elements (REEs), that is, di(2‐ethylhexyl)phosphoric acid (HDEHP) and 2‐ethyl(hexyl) phosphonic acid mono‐2‐ethylhexyl ester (HEH[EHP]) were developed into [DEHP]− type acid–base coupling bifunctionalized ionic liquids (ABC‐BILs) and [EHEHP]− type ABC‐BILs, respectively. The combinations of ABC‐BIL extractants revealed synergistic effects for REEs. Seven different combinations of ABC‐BILs and five kinds of REEs confirmed the novel synergistic extraction. Some synergy coefficients of the combined ABC‐BILs were bigger than those of mixed HDEHP and HEH[EHP] by two orders of magnitude. The first synergistic extraction produced by ionic liquid extractants in the field of solvent extraction was reported in this article. The novel synergistic extraction from combined ABC‐BILs extractants revealed highly efficient and environmentally friendly potential in both of academic research and industrial application for REEs separation. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3859–3868, 2014

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Section: Introductionmentioning

confidence: 99%

The adjustable synergistic effects between acid–base coupling bifunctional ionic liquid extractants for rare earth separation

Sun

Waters

2014

AIChE Journal

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“…However, EHEHPA has lower extraction efficiency in comparison with D2EHPA. The use of extractant blends of D2EHPA with various agents also demonstrates some improvements in extraction and separation processes [30][31][32] but does not eliminate all drawbacks of the base extractant. Hence, an active search for new highly efficient extractants and accurate study of their extraction properties are still of utmost actuality.…”

Section: Introductionmentioning

confidence: 99%

Linear 2-Ethylhexyl Imidophosphoric Esters as Effective Rare-Earth Element Extractants

Bredov¹,

Gorlov²,

Esin³

et al. 2020

Applied Sciences

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Imidophosphoric organic esters containing phosphoryl groups are potential polydentate ligands and promising extractants of rare-earth elements. For their preparation, a monophosphazene salt [PCl3=N−PCl3]+[PCl6]− and short phosphazene oligomers of the general formula [Cl–(PCl2=N)n–PCl3]+[PCl6]−, where n = 4–7, were synthesized via living cationic polymerization of Cl3P=NSiMe3 and used as starting compounds. All phosphazenes were reacted with 2-ethylhexanol to obtain the corresponding esters of imidophosphoric acids (EIPAs). The formation of imidophosphoric acids occurs due to the phosphazene-phosphazane rearrangement of –P(OR)2=N– or –P(OH)(OR)=N– units, where R = 2-ethylhexyl. The prepared EIPAs were characterized by 1H, 31P NMR, and MALDI-TOF analyses and their extractive capacity towards lanthanide ions in aqueous solutions of nitric acid was examined. The EIPAs are mixtures of mono-, di-, and trifunctional compounds of the type HxA, where x = 1–3, which can form chelate complexes of lanthanide ions [Ln(A)z], where z = 3–6, depending on the chain length. The longer chain EIPAs are more suitable for collective rare-earth elements extraction. A comparison of the extraction properties of the EIPAs with the industrially used polyalkylphosphonitrilic acid (PAPNA) was drawn.

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“…The separation of rare earth elements is generally achieved through solvent extraction. This method is most popular due to the fact that it is easier to control the great amount of charged liquids involved and the speed of the processes; it's also easy and practical for the extraction of rare elements [5].…”

Section: Introductionmentioning

confidence: 99%

Effective Parameters Interaction Study for Cerium Extraction From Sulfuric Media Using Di-(2-Ethylhexyl) Phosphoric Acid

Kashi¹,

Habibpour²,

Maleki³

et al. 2017

ChChT

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Abstract.1 The solvent extraction of cerium(III) from its sulfuric solution with di-(2-ethylhexyl) phosphoric acid diluted by kerosene was investigated. Initially, a survey was conducted in order to identify the conditions influencing the solvent extraction process. Extractant concentration in the organic phase, organic phase to aqueous phase ratio, temperature, pH, and contact time were identified as important factors. Among these factors, the temperature and contact time were found less effective in comparison to other factors. Thus, a contact time of ten minutes for the two phases at room temperature of 298 K was chosen for all experiments. Design expert software was employed for designing the experiments, investigating the effects of the factors on the solvent extraction, statistical analysis, and obtaining the optimal values of the factors. It was established that the factors influencing the solvent extraction, except extractant concentration and organic phase to aqueous phase ratio, were independent and have no interaction on each other.

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Effect of complexing agent lactic acid on the extraction and separation of Pr(III)/Ce(III) with di-(2-ethylhexyl) phosphoric acid

Cited by 61 publications

References 10 publications

The adjustable synergistic effects between acid–base coupling bifunctional ionic liquid extractants for rare earth separation

The adjustable synergistic effects between acid–base coupling bifunctional ionic liquid extractants for rare earth separation

Linear 2-Ethylhexyl Imidophosphoric Esters as Effective Rare-Earth Element Extractants

Effective Parameters Interaction Study for Cerium Extraction From Sulfuric Media Using Di-(2-Ethylhexyl) Phosphoric Acid

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