An engineering‐purpose preparation strategy for ammonium‐type ionic liquid with high purity

Sun, Xiaoqi; Yang, Ji; Liu, Yu; Chen, Ji; Li, Deqian

doi:10.1002/aic.12039

Cited by 65 publications

(45 citation statements)

References 42 publications

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“…A kind of ILs was designed and synthesized by tricaprylmethylammonium chloride (Aliquat 336 or A336) and traditional carboxylic acid and phosphoric acid extractant [2]. Because the cation and anion of this kind of ILs are all the functional group for the REEs extraction, we called them bifunctional ionic liquid extractants (Bif-ILEs).…”

Section: Preparation Of Bif-ilesmentioning

confidence: 99%

“…Li et al investigated the REEs separation process using both P507 and alcohol as the extractant and additive to accelerate stripping and improve emulsification phenomenon [1]. Conventional acidity extractants, whether acidic organophosphorous or naphthenic acid used widely in REEs hydrometallurgy in China, always need to be saponified by NH 3 •H 2 O, NaOH, or Ca(OH) 2 to facilitate the cation exchange of REEs, which will undoubtedly produce the corresponding ammonia nitrogen, Na + , or Ca 2+ wastewater into the environment. Especially, in recent years, the concept of "green chemistry" has been paid more and more attention, and more and more constraining environmental regulations have been adopted to limit the industrial pollution.…”

Section: Generalmentioning

confidence: 99%

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Application of Ionic Liquid Extractants on Rare Earth Green Separation

Yang

Chen

Cui

et al. 2016

Green Chemistry and Sustainable Technology

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A green solvent extraction process for the separation of rare earth elements (REEs) in different media (such as hydrochloric acid media, nitric acid media, and sulfuric media) was developed using bifunctional ionic liquid extractants (Bif-ILEs) especially containing quaternary ammonium and phosphonium-based ILs. The characteristics of the Bif-ILEs are simple synthesis, high extraction ability and selectivity, low extraction acid and base consumption, and easy stripping. Bif-ILEs could be synthesized by acid/base neutralization, and this reaction process was under mild condition with easier purification. The extraction thermodynamics showed that the separation factor (β) values for REEs were changed with the different Bif-ILEs or reaction media. The inner synergistic effect between cations and anions in Bif-ILEs has greatly facilitated the β values of REEs and also avoided the production of ammonia nitrogen caused by the acidity extractant saponification. The kinetic experimental data on the separation of REEs by Bif-ILEs, with a constant interfacial area cell with laminar flow, showed that there exist real possibilities for increasing the efficiency of the separation by the use of kinetic factors. The kinetics model could be deduced from the ratecontrolling step. Serving as extractants, additives, and templating materials, ILs were used in the preparation of separation materials, including silica-supported ionic liquids (S-SILs), membrane-supported ionic liquids (M-SILs), and polymersupported ionic liquids (P-SILs). ILs were usually attached or doped into the solid support and offered high extraction efficiency and excellent stability for REEs separation. Using such separation materials may indeed enable us to substantially

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Section: Preparation Of Bif-ilesmentioning

confidence: 99%

Section: Generalmentioning

confidence: 99%

Application of Ionic Liquid Extractants on Rare Earth Green Separation

Yang

Chen

Cui

et al. 2016

Green Chemistry and Sustainable Technology

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“…[A336][C272] was synthesized in our laboratory [29]. The chemical structures of extractants are shown in Fig.…”

Section: Materials and Reagentsmentioning

confidence: 99%

Removal of Cr(III, VI) by quaternary ammonium and quaternary phosphonium ionic liquids functionalized silica materials

Liu¹,

Guo²,

Zhu³

et al. 2010

Chemical Engineering Journal

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126

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“…The separation chemistry of rare earth ions (REs(III)) is hugely important due to their remarkable chemical similarity, but the selection of extractants is a key factor confining the development of the RE metals industry. Traditional organic amine, 1,3-diketonate, carboxylic acid, and phosphonic acid extractants are most commonly used in industrial REs(III) separation [2][3][4][5]. However, there are many limitations to these traditional extraction systems, including poor selectivity and stripping difficulty.…”

Section: Introductionmentioning

confidence: 99%

Extraction mechanism of rare earths from chloride acidic solution with ammonium-bifunctionalized ionic liquid extractants

et al. 2016

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A series of ammonium-bifunctionalized ionic liquid extractants (ammonium-Bif-ILEs) combined with a number of anions, including carboxylic acids and 1,3-diketonates, have been prepared and studied in this report. Their extraction behavior and properties toward rare earth ions (REs(III)) are systematically investigated in chloride media as a function of important parameters such as aqueous phase pH, salting-out agent concentrations, and extraction temperature. The separation performance of ammonium-Bif-ILEs toward REs(III) are systematically discussed. The results demonstrate that ammonium-Bif-ILEs have a synergistic effect between the cation and anions in separation of REs(III). The influences of different anions on separation factor () values are further studied. By comparison, ammonium-Bif-ILEs containing 1,3-diketonates have more potential applications in La(III)/RE(III) separation than those containing carboxylic acids. ammonium-bifunctional ionic liquids, separation, rare earths Citation:Yang HL, Chen J, Wang W, Cui HM, Liu WG, Liu Y. Extraction mechanism of rare earths from chloride acidic solution with ammonium-bifunctionalized ionic liquid extractants.

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An engineering‐purpose preparation strategy for ammonium‐type ionic liquid with high purity

Cited by 65 publications

References 42 publications

Application of Ionic Liquid Extractants on Rare Earth Green Separation

Application of Ionic Liquid Extractants on Rare Earth Green Separation

Removal of Cr(III, VI) by quaternary ammonium and quaternary phosphonium ionic liquids functionalized silica materials

Extraction mechanism of rare earths from chloride acidic solution with ammonium-bifunctionalized ionic liquid extractants

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