Interactions between trivalent rare earth oxides and mixed [Hbet][Tf2N]:H2O systems in the development of a one-step process for the separation of light from heavy rare earth elements

Schaeffer, Nicolas; Grimes, Sue; Cheeseman, Christopher

doi:10.1016/j.ica.2015.09.015

Cited by 23 publications

(23 citation statements)

References 16 publications

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“…An optimisation of the scandium leaching conditions in this IL regarding the reaction temperature and the molar ratio of the reagents was performed by Mawire and van Dyk [129] [130].…”

Section: Task-specific Ilsmentioning

confidence: 99%

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Richter

Ruck

2019

Molecules

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Ionic liquids (ILs) and deep eutectic solvents (DESs) have proven to be suitable solvents and reactants for low-temperature reactions. To date, several attempts were made to apply this promising class of materials to metal oxide chemistry, which, conventionally, is performed at high temperatures. This review gives an overview about the scientific approaches of the synthesis as well as the dissolution of metal oxides in ILs and DESs. A wide range of metal oxides along with numerous ILs and DESs are covered by this research. With ILs and DESs being involved, many metal oxide phases as well as different particle morphologies were obtained by means of relatively simple reactions paths. By the development of acidic task-specific ILs and DESs, even difficultly soluble metal oxides were dissolved and, hence, made accessible for downstream chemistry. Especially the role of ILs in these reactions is in the focus of discussion.

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“…An optimisation of the scandium leaching conditions in this IL regarding the reaction temperature and the molar ratio of the reagents was performed by Mawire and van Dyk [129] [130].…”

Section: Task-specific Ilsmentioning

confidence: 99%

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Richter

Ruck

2019

Molecules

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“…that can be adjusted by varying either the anion or the cation to permit their use in a wide range of applications. In particular they have been used as solvents for the extraction, separation and purification of metals and metal oxides [21][22][23], including solubilising and separating trivalent RE oxides [24][25][26][27][28][29][30]. This includes the use of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C4mim][Tf2N] in a liquid-liquid extraction process [30] for the recovery of RE elements from waste fluorescent lamp phosphor powders in which the RE elements were extracted with N,N-dioctyldiglycolamic acid (DODGAA) dissolved in the ionic liquid.…”

Section: Introductionmentioning

confidence: 99%

Use of extraction chromatography in the recycling of critical metals from thin film leach solutions

Schaeffer

Grimes

Cheeseman

2017

Inorganica Chimica Acta

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Phosphors and optoelectronic thin film electronic device layers contain critical metals including lanthanides and indium that should be recycled. Solvent impregnated resins (SIRs) containing ( Sn is achieved by elution of In(III) with 2.5M HNO3 and Sn(IV) with 5M acid. La is separated from the other lanthanides by elution of La(III) with 2.5M HNO3 and the remaining lanthanides 2 with 5M acid. The SIR resins can be reused over a series of at least five cycles of loading, stripping, and rinsing to reduce reagent costs and achieve economic critical metal recovery by extraction chromatography.

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“…For this reason ILs can be designed to be either hydrophilic or hydrophobic, oleophilic or oleophobic or to achieve the selective solubility of specific compounds including the key components of wastes . Some properties of ionic liquids can also be temperature‐dependent for example hydrophilic at low temperature and hydrophobic at higher temperatures . The use of ionic liquids in biodiesel production has been reviewed by Andreani and Rocha …”

Section: Introductionmentioning

confidence: 99%

“…11,12 Some properties of ionic liquids can also be temperature-dependent for example hydrophilic at low temperature and hydrophobic at higher temperatures. 13 The use of ionic liquids in biodiesel production has been reviewed by Andreani and Rocha. 14 Brønsted acidic ionic liquids can be used as catalyst media in Fischer esterification of carboxylic acids 15 and in biodiesel production.…”

Section: Introductionmentioning

confidence: 99%

Dual‐functionality ionic liquid mix for extraction and esterification of fatty acids as a step towards increasing the efficiency of conversion of waste cooking oils to biodiesel

Grimes

Kewcharoenwong

2017

J of Chemical Tech & Biotech

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BACKGROUND The increasing value of pure vegetable oils has made the use of waste cooking oils an attractive alternative feedstock for biodiesel production but the presence of free fatty acids in the waste significantly reduces efficiency of the conversion. RESULTS A low‐temperature mixed ionic liquid system with dual extraction and catalytic functions for the conversion of waste oils containing high levels of free fatty acids to biodiesel was successfully trialled. The solvent, a totally miscible system of HPyrBr and the Brønsted acid, SPyrHSO4, allows the key properties of each ionic liquid, as extractant or catalyst, to work uninhibited by the presence of the other. Extraction of free fatty acids from vegetable oils and their conversion to methyl esters in high yield is demonstrated for vegetable oils, containing single and mixed fatty acids, and for a model waste cooking oil. The oil separated from free fatty acids in the waste has a low acid value and can be converted efficiently to biodiesel; with the ionic liquid solvent recovered unchanged for reuse. CONCLUSIONS A mixed ionic liquid extraction‐esterification solvent process has been developed to effect efficient conversion of free fatty acids in waste vegetable oils to biodiesel and their conversion to esters. © 2017 Society of Chemical Industry

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Interactions between trivalent rare earth oxides and mixed [Hbet][Tf2N]:H2O systems in the development of a one-step process for the separation of light from heavy rare earth elements

Cited by 23 publications

References 16 publications

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Use of extraction chromatography in the recycling of critical metals from thin film leach solutions

Dual‐functionality ionic liquid mix for extraction and esterification of fatty acids as a step towards increasing the efficiency of conversion of waste cooking oils to biodiesel

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