Recovery of rare earth elements from coal flyash using deep eutectic solvents as leachants and precipitating as oxalate or fluoride

Karan, Ram; Sreenivas, T.; Kumar, Mukesh; Singh, Deepak Kumar

doi:10.1016/j.hydromet.2022.105952

Cited by 25 publications

(4 citation statements)

References 46 publications

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“…Recovery of REE (as oxalates and fluorides) from coal fly ash was achieved by applying choline chloride:p-toluenesulfonic acid monohydrate (1:1) deep eutectic solvent (DES) with leachability of >85%, ca. 35% higher than sulfuric(VI) acid [191] (Fig. 18).…”

Section: Solid-phase Extractionmentioning

confidence: 96%

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On membrane-based approaches for rare earths separation and extraction – Recent developments

Kujawa,

Al Gharabli,

Szymczyk

et al. 2023

Coordination Chemistry Reviews

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Section: Solid-phase Extractionmentioning

confidence: 96%

Section: Solid-phase Extractionmentioning

confidence: 99%

On membrane-based approaches for rare earths separation and extraction – Recent developments

Kujawa,

Al Gharabli,

Szymczyk

et al. 2023

Coordination Chemistry Reviews

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“…Deep eutectic solvents were investigated in the recovery of rare earth elements from coal fly ash [62]. Mixtures of choline chloride (ChCl) with lactic acid (LA) and ChCl with para-toluene sulphonic acid monohydrate (pTSA) were used in the investigation.…”

Section: Deep Eutectic Solvents and Rare Earth Elementsmentioning

confidence: 99%

“…After dissolution, the leached liquor was diluted at 50% with demineralized water and REEs were recovered by direct chemical precipitation with oxalic acid. Deep eutectic solvents were investigated in the recovery of rare earth elements from coal fly ash [62]. Mixtures of choline chloride (ChCl) with lactic acid (LA) and ChCl with para-toluene sulphonic acid monohydrate (pTSA) were used in the investigation.…”

Section: Deep Eutectic Solvents and Rare Earth Elementsmentioning

confidence: 99%

Recent Work on the Recovery of Rare Earths Using Ionic Liquids and Deep Eutectic Solvents

Alguacil,

Robla

2023

Minerals

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With the development of smart technologies, the use of rare-earth elements (REEs) has been widespread; thus, their importance as valuable and strategic metals has been boosted to levels never known before. Due to their scarcity in the Earth’s crust, the recovery of these elements from secondary resources has also witnessed further developments. Traditional pyrometallurgical and hydrometallurgical processing techniques, though widely used in the recovery of these REEs, have some environmental drawbacks; thus, new recovery approaches are under development. Here, Solvometallurgy has emerged as an environmentally friendly technology, and ionic liquids and deep eutectic solvents have turned out to be first-line chemicals to be used in the different unit operations employed in solvometallurgical processing, i.e., leaching, liquid–liquid extraction, ion exchange (adsorption), precipitation, and electrolysis. This manuscript reviews the most recent literature (2002–June 2023) concerning the use of ionic liquids and deep eutectic solvents in the recovery of REEs from various sources.

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Innovative Approach to Transform Mining Waste into Value Added Products

Godbole,

Deshpande,

Jawadand

et al. 2024

Springer Proceedings in Earth and Environmental Sciences

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Recovery of rare earth elements from coal flyash using deep eutectic solvents as leachants and precipitating as oxalate or fluoride

Cited by 25 publications

References 46 publications

On membrane-based approaches for rare earths separation and extraction – Recent developments

On membrane-based approaches for rare earths separation and extraction – Recent developments

Recent Work on the Recovery of Rare Earths Using Ionic Liquids and Deep Eutectic Solvents

Innovative Approach to Transform Mining Waste into Value Added Products

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