Tailored hydrophobic deep eutectic solvent for removing trace aluminum impurity to produce high-purity GdCl3

Ni, Shuainan; Yu, Guisu; Gao, Yun; Zhang, Sijia; Su, Hao; Sun, Xiaoqi

doi:10.1016/j.seppur.2023.123620

Cited by 3 publications

(2 citation statements)

References 50 publications

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“…the system appeared to be highly selective with respect to thorium. The next reference used a DES as a medium to purify Gd 3+ by extracting the impurity (Al 3+ ) present in GdCl 3 solutions [38]. Using various formulations, Gd extraction was less than 20% in all the cases, whereas aluminum extraction exceeded 70% except in the case of the amide:genifibrozil (4:1) mixture.…”

Section: Solvent Extractionmentioning

confidence: 99%

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements

Alguacil

2024

Molecules

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The boosted interest in using rare earth elements (REEs) in modern technologies has also increased the necessity of their recovery from various sources, including raw materials and wastes. Though hydrometallurgy plays a key role in these recovery processes, some drawbacks (apparent or not) of these processes (including the use of aggressive mineral acids, harmful extractants, and diluents, etc.) have led to the development of an environmental friendship subclass named solvometallurgy, in which non-aqueous solvents substituted to the aqueous media of the hydrometallurgical processing. Together with ionic liquids (ILs), the non-aqueous solvents chosen for these usages are the chemicals known as deep eutectic solvents (DEEs). The utilization of DEEs included the leaching of REEs from the different sources containing them and also in the separation-purification steps necessary for yielding these elements, normally oxides or salts, in the most purified form. This work reviewed the most recent literature (2023 year) about using deep eutectic solvents to recover REEs from various sources and coupling these two (DESs and REEs) to derive compounds to be used in other fields.

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Section: Solvent Extractionmentioning

confidence: 99%

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements

Alguacil

2024

Molecules

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“…By adjusting the pH of the water phase, the separation factor β for Al 3+ /Gd 3+ was as high as 340, the removal rate of Al 3+ was 97.1%, but the recovery rate of Gd 3+ was only 85.6% [12]. Ni Shuainan et al proposed a new method based on a hydrophobic deep eutectic solvent for separating Al 3+ and Gd 3+ , which has a good purification effect on single component rare earth gadolinium chloride [13]. Li Wentao et al prepared aluminum ion imprinted polymer using a surface imprinting method, and used adsorption to remove aluminum.…”

Section: Introductionmentioning

confidence: 99%

Removal of Aluminum from Synthetic Rare Earth Leach Solution by Selective Complexation and Turbidity Point Extraction

Gao,

Wang,

Oyang

et al. 2023

Minerals

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During the leaching process of ion-adsorbed rare earth ores, large amounts of non-rare earth impurities such as aluminum and iron will be generated. This study selected glutamic acid as a complex agent to selectively calculate aluminum ions; then, added non-ionic surfactants and extract and separate aluminum ions from a rare earth solution using the cloud point extraction method. The effects of solution pH, reaction temperature, equilibration time, amount of glutamic acid, reaction time, and amount of Triton X-114 on aluminum extraction were investigated. The results showed that with a Mglu:MAl ratio of 3:1, a solution pH of 4.5, a constant temperature of 40 °C, and the addition of 10 mL Triton X-114 after 10 min of reaction time, the single extraction efficiency of aluminum ions reached 78.01%, and the extraction efficiency of rare earths was only 5.09% after 10 min of equilibration time. The reaction equation of glutamic acid with aluminum ions was determined, and the lowest extraction concentration of aluminum ions in the glutamic acid complexation extraction solution was found to be cAl = 0.045 ± 0.003 g/L, with a separation coefficient of β(Al/RE) = 66.15. This result indicated that the aluminum ions in the mixed solution could be effectively separated from the rare earth ions when using glutamic acid as a complexing agent in combination with the turbidity point extraction method.

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Atypical deep eutectic solvents: New opportunities for chemical analysis

Shishov,

El-Deen,

Godunov

et al. 2024

TrAC Trends in Analytical Chemistry

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Tailored hydrophobic deep eutectic solvent for removing trace aluminum impurity to produce high-purity GdCl3

Cited by 3 publications

References 50 publications

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements

Removal of Aluminum from Synthetic Rare Earth Leach Solution by Selective Complexation and Turbidity Point Extraction

Atypical deep eutectic solvents: New opportunities for chemical analysis

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