Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements

Okamura, H.; Hirayama, Naoki

doi:10.2116/analsci.20sar11

Cited by 42 publications

(21 citation statements)

References 158 publications

(129 reference statements)

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“…Another major task for thermoresponsive IL/water mixtures is the extraction of heavy ions from water [ 166 , 172 ]. The aim is both to refine valuable rare earths [ 173 ], as well as to extract a variety of metals from drinkable water. As an example, a water solution of [Chol][NTf

] with a UCST of 72 °C has been used in reference [ 174 ] to extract Nd(III).…”

Section: Applicationsmentioning

confidence: 99%

Thermoresponsive Ionic Liquid/Water Mixtures: From Nanostructuring to Phase Separation

et al. 2022

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The thermodynamics, structures, and applications of thermoresponsive systems, consisting primarily of water solutions of organic salts, are reviewed. The focus is on organic salts of low melting temperatures, belonging to the ionic liquid (IL) family. The thermo-responsiveness is represented by a temperature driven transition between a homogeneous liquid state and a biphasic state, comprising an IL-rich phase and a solvent-rich phase, divided by a relatively sharp interface. Demixing occurs either with decreasing temperatures, developing from an upper critical solution temperature (UCST), or, less often, with increasing temperatures, arising from a lower critical solution temperature (LCST). In the former case, the enthalpy and entropy of mixing are both positive, and enthalpy prevails at low T. In the latter case, the enthalpy and entropy of mixing are both negative, and entropy drives the demixing with increasing T. Experiments and computer simulations highlight the contiguity of these phase separations with the nanoscale inhomogeneity (nanostructuring), displayed by several ILs and IL solutions. Current applications in extraction, separation, and catalysis are briefly reviewed. Moreover, future applications in forward osmosis desalination, low-enthalpy thermal storage, and water harvesting from the atmosphere are discussed in more detail.

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] with a UCST of 72 °C has been used in reference [ 174 ] to extract Nd(III).…”

Section: Applicationsmentioning

confidence: 99%

Thermoresponsive Ionic Liquid/Water Mixtures: From Nanostructuring to Phase Separation

et al. 2022

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“…Many systems, including cation exchangers (Table 2) and neutral extractants (Table 3), as well as synergistic systems (Table 4), have been studied for the recovery of REEs and have shown their potential in common solvents. This is why the feasibility of using these various systems has been implemented within the framework of IL-based extraction for the recovery of REEs [111,112]. Applications of mixtures of ILs and molecular extractants in metal solvent extraction technology have been recently reviewed by Wang et al [113].…”

Section: Il-based Extraction Systems For Ree Recoverymentioning

confidence: 99%

Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

et al. 2021

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Rare earth elements (REEs) are becoming more and more significant as they play crucial roles in many advanced technologies. Therefore, the development of optimized processes for their recovery, whether from primary resources or from secondary sources, has become necessary, including recovery from mine tailings, recycling of end-of-life products and urban and industrial waste. Ionic solvents, including ionic liquids (ILs) and deep-eutectic solvents (DESs), have attracted much attention since they represent an alternative to conventional processes for metal recovery. These systems are used as reactive agents in leaching and extraction processes. The most significant studies reported in the last decade regarding the recovery of REEs are presented in this review.

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“…It is considered to be a new green solvent that can replace traditional solvents. Ionic liquid, inorganic salt, and water form an efficient and gentle new green separation system, which has the advantages of short phase separation time, low viscosity, not easy to emulsify during extraction, and ionic liquid can be recycled [68]. Liu et al used the ionic liquid to pre-treat Haematococcus pluvialis to destroy the cell wall, thereby improving the extraction efficiency of astaxanthin [69].…”

Section: Ionic Liquid Extraction (Ile)mentioning

confidence: 99%

Screening of Marine Bioactive Antimicrobial Compounds for Plant Pathogens

Zhao

Chen

2021

Marine Drugs

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Plant diseases have been threatening food production. Controlling plant pathogens has become an important strategy to ensure food security. Although chemical control is an effective disease control strategy, its application is limited by many problems, such as environmental impact and pathogen resistance. In order to overcome these problems, it is necessary to develop more chemical reagents with new functional mechanisms. Due to their special living environment, marine organisms have produced a variety of bioactive compounds with novel structures, which have the potential to develop new fungicides. In the past two decades, screening marine bioactive compounds to inhibit plant pathogens has been a hot topic. In this review, we summarize the screening methods of marine active substances from plant pathogens, the identification of marine active substances from different sources, and the structure and antibacterial mechanism of marine active natural products. Finally, the application prospect of marine bioactive substances in plant disease control was prospected.

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Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements

Cited by 42 publications

References 158 publications

Thermoresponsive Ionic Liquid/Water Mixtures: From Nanostructuring to Phase Separation

Thermoresponsive Ionic Liquid/Water Mixtures: From Nanostructuring to Phase Separation

Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

Screening of Marine Bioactive Antimicrobial Compounds for Plant Pathogens

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