The inner synergistic effect of bifunctional ionic liquid extractant for solvent extraction

Sun, Xiaoqi; Yang, Ji; Hu, Fengchun; He, Bo; Chen, Ji; Li, Deqian

doi:10.1016/j.talanta.2010.03.041

Cited by 171 publications

(111 citation statements)

References 35 publications

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“…The extraction of Eu (III) over Am (III) was studied, and superior extraction of Eu (III) and excellent separation factors were achieved [42]. The following extraction mechanism of Eu(III) with bis(2-ethylhexyl) phosphate-exchanged Aliquat 336 was proposed [43]. Eu 3Q DEHP 3NO Eu(NO ) 3Q DEHP…”

Section: 24mentioning

confidence: 99%

Supported Ionic Liquid Membranes for Metal Separation

Ola¹,

Matsumoto²

2017

Progress and Developments in Ionic Liquids

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Metals are widely used in various areas of human life, and their existence in the environment at high concentrations has become a cause for concern. Metals can enter the human body and disturb the human metabolic system. Therefore, research to recover metals from their matrix both from industrial wastewater and from ores or scraps containing metals is of great importance. One of the separation techniques proposed to overcome those issues involves using supported ionic liquid membranes (SILMs). This chapter summarizes the recovery of metals using SILM. In SILM, an ionic liquid that acts as an extractant is embedded in small pores of a polymer support. The latest type of physical impregnation of ionic liquid, which is the type most commonly used in metal separation, is called polymer inclusion membrane (PIM). PIMs were prepared by casting a solution containing an ionic liquid, a plasticizer and a base polymer to form a thin, lexible and stable ilm. A PIM including ionic liquids has a similar coniguration to SILM, and it is considered to be a kind of SILM. In this chapter, efects on the stability and selectivity in SILM and PIM for metal separation are reviewed.

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Section: 24mentioning

confidence: 99%

Supported Ionic Liquid Membranes for Metal Separation

Ola¹,

Matsumoto²

2017

Progress and Developments in Ionic Liquids

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“…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%

“…The variation of the extraction sequence in nitrate medium was different from that in chloride medium. The NO 3 À or Cl À participated in forming the extracted complex. The property of NO 3 À or Cl À could regulate the stability of the extracted complex and the selectivity of RE 3+ extraction.…”

Section: [A336][oh] ([Trialkylmethylammonium][hydroxide])mentioning

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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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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“…18) The use of saponification with NaOH or NH 4 OH was tried to overcome this problem. 19) The saponification reaction can be described13, 20) Na aq + + HA org = NaA org + H aq + (6) and…”

Section: Cationic Exchange Reagentsmentioning

confidence: 99%

Separation of Cobalt and Nickel from Aqueous Solution

Liu¹,

Lee²

2013

Journal of the Korean Institute of Resources Recycling

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Recovery of pure cobalt and nickel from diverse resources is important due to the increased demand for these metals. In order to get cobalt and nickel with high purity, separation of them from other metal ions is necessary. In this review, several methods to obtain pure cobalt or nickel solution, such as solvent extraction, ion exchange, precipitation were introduced and compared. For solvent extraction, the advantage and disadvantage of the separation process together with detailed process conditions were investigated.

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The inner synergistic effect of bifunctional ionic liquid extractant for solvent extraction

Cited by 171 publications

References 35 publications

Supported Ionic Liquid Membranes for Metal Separation

Supported Ionic Liquid Membranes for Metal Separation

Application of Ionic Liquid Extractants on Rare Earth Green Separation

Separation of Cobalt and Nickel from Aqueous Solution

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