Solvent extraction of Pr and Nd from chloride solutions using ternary extractant system of Cyanex 272, Alamine 336 and TBP

Liu, Yang; Jeon, Ho Seok; Lee, Man Seung

doi:10.1016/j.jiec.2015.06.009

Cited by 39 publications

(10 citation statements)

References 31 publications

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“…The extraction mechanism of rare earths using acidic extractants has been investigated in different researches . Taking into account these studies and the speciation depicted in Equations , different extraction mechanisms of Ce/Eu/Y from chloride medium were considered.…”

Section: Theoretical Modelmentioning

confidence: 99%

Solvent extraction modeling of Ce/Eu/Y from chloride media using D2EHPA

et al. 2019

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End‐of‐life fluorescent lamps are becoming essential in the rare earths (REEs) field and suppose a feasible secondary source for getting them, reducing thus their supply risk. Considering the proved viability of the cationic extractants, the present study aims at establishing a solvent extraction model using di‐(2‐ethylhexyl)phosphoric acid (D2EHPA) not only based on the individual Ce, Eu, and Y behavior in chloride media, but also bearing in mind the competitive extraction of these metals in Ce/Eu/Y mixtures, depending on the media variables. Furthermore, the model allow determining the optimal REEs separation conditions. The results disclose that Y could be separated from the mixture using 0.1 mol/L D2EHPA, acidity above of 3 mol/L of protons and chloride concentrations higher than 4 mol/L.

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Section: Theoretical Modelmentioning

confidence: 99%

Solvent extraction modeling of Ce/Eu/Y from chloride media using D2EHPA

et al. 2019

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“…Different separation studies using ionic liquids were reported recently. A better Nd/Pr separation factor was obtained with the addition of TBP in the binary mixture of Cyanex 272 and Alamine 336 (Liu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Rare earths separation from fluorescent lamp wastes using ionic liquids as extractant agents

et al. 2018

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Processing of end-of-life products has become essential in the rare earth elements (REEs) recovery field because the demand for these metals has increased over the last years due to their intensive use in advanced technologies. Fluorescent lamp wastes are considered one of the most interesting end-of-life products for investigation due to their high REEs content, mainly yttrium and europium. As a result, red phosphors (Y 2 O 3 :Eu 3+-YOX) have been chosen for evaluating their REEs' recovery potential. The REEs from a YOX reach liquor, coming from a soft leaching process have been precipitated adding oxalic acid and calcined to get the REEs in oxide form. Cyanex 572, D2EHPA and the ionic liquids, Primene 81R•Cyanex 572 IL and Primene 81R•D2EHPA IL, have been chosen to investigate the efficiency of REEs separation in chloride media. Yttrium, europium and cerium have been individually recovered by a four stages cross-flow solvent extraction process using the Primene 81R•D2EHPA IL and the Primene 81R•Cyanex 572 IL as extractants. Ce(III), Eu(III) and Y(III) have been obtained at high purities ≥ 99.9%. 4 mol/L HCl has been used to recover the yttrium and the europium from the organic phases.

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“…Cyanex 272 (bis(2,4,4-trimethylpentyl)phosphinic acid, Cy272) (Liu et al, 2014), DEHPA (di-(2-ethylhexyl)phosphoric acid) and EHEHPA (2-ethylhexylphosponic acid mono-2-ethylhexyl ester, PC88A, P507) (Mohammadi et al, 2015), Cyanex 923 (mixture of trialkylphosphine oxides) (Batchu et al, 2017), TBP (tributyl phosphate) (Chen et al, 2016) and the ionic liquids (Larsson and Binnemans, 2015;Chen et al, 2017) are but a few examples. Liu et al suggest that by adding TBP into the binary mixture of Cyanex 272 and Alamine 336 a better Nd/Pr separation factor is obtained (Liu et al, 2015). The extraction of neodymium and praseodymium abilities in using different ionic liquid were investigated by Padhan and Sarangi and they proposed the Cyanex 272•Alamine 336 IL > DEHPA•Alamine 336 IL > Cyanex 272 > DEHPA > Aliquat 336 extraction order (Padhan and Sarangi, 2017).…”

Section: Introductionmentioning

confidence: 99%

Neodymium recovery from NdFeB magnet wastes using Primene 81R·Cyanex 572 IL by solvent extraction

Pavón

Fortuny

Coll

et al. 2018

Journal of Environmental Management

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The necessity of Rare Earth Elements (REEs) recycling is crucial to minimizing their supply risk and provide an alternative to greener technologies. Hence, the REEs recovery from NdFeB magnet wastes using cationic extractants by solvent extraction technique has been investigated in this research. Due to the difficulty in maintaining the aqueous pH in the industrial counter-current devices when extractants like Cyanex 272 or Cyanex 572 are used, the Primene 81R·Cyanex 572 ionic liquid has been synthesised to overcome this. 99.99% Nd(III) recovery with a purity of 99.7% from an aqueous mixture of Nd/Tb/Dy in chloride medium, the three representative REEs present in the NdFeB magnets wastes, has been achieved after two stages counter-current extraction process using 0.30 M of Primene 81R·Cyanex 572 ionic liquid (1:4 A:O ratio) diluted in Solvesso 100, without any aqueous pH conditioning.

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Solvent extraction of Pr and Nd from chloride solutions using ternary extractant system of Cyanex 272, Alamine 336 and TBP

Cited by 39 publications

References 31 publications

Solvent extraction modeling of Ce/Eu/Y from chloride media using D2EHPA

Solvent extraction modeling of Ce/Eu/Y from chloride media using D2EHPA

Rare earths separation from fluorescent lamp wastes using ionic liquids as extractant agents

Neodymium recovery from NdFeB magnet wastes using Primene 81R·Cyanex 572 IL by solvent extraction

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