Recovery of rare earth elements from simulated fluorescent powder using bifunctional ionic liquid extractants (Bif‐ILEs)

Yang, Hualing; Wang, Wei; Cui, Hongmin; Zhang, Dongli; Liu, Yu; Chen, Ji

doi:10.1002/jctb.2696

Cited by 90 publications

(33 citation statements)

References 34 publications

(42 reference statements)

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“…Hydrometallurgy is also the most commonly used method for extracting individual rare earth oxides from mineral concentrates (NRMRL, 2012). Processes such as selective leaching of rare-earth-containing portions with solution, impurities removal, and mutual separation of REEs by solvent extraction (Yan et al, 2006), (Zielinski and Szczepanik, 1993), supercritical fluid extraction (Shimizu et al, 2005), ion exchange (Hubicki and Olszak, 2002), ionic liquid (Liu et al, 2012), are included.…”

Section: Ree Recovery By Hydrometallurgymentioning

confidence: 99%

Rare Earth Elements Recovery from Waste Fluorescent Lamps: A Review

Tan

Zeng

2014

Critical Reviews in Environmental Science and Technology

206

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Rare earth elements (REEs) are used in a wide range of products. The global demand for REEs is growing at a rate of 3.7-8.6% annually. Yttrium (Y), europium (Eu), cerium (Ce), lanthanum (La) and terbium (Tb) are used in the phosphors for fluorescent lamps (FLs). This article reviews the challenges and techniques associated with the recycling and recovery of REEs in phosphors from waste FLs. The recovery rate and grade of resultant products and the processing costs are the primary factors to be considered regarding trichromatic phosphors enrichment and monochrome phosphor separation. Currently, most researchers have focused on the recovery of Y and Eu from red phosphor using hydrometallurgy methods, and on the difficulties of leaching Ce, La, Tb and Eu in green and blue phosphors. The final recovery rate of Y and Eu can reach more than 80%, but a higher rate is desirable, considering the total value of the REEs in FLs. Studies on improving the leaching behavior of phosphors have been conducted; however, they present problems such as energy and agents consumption, and generation of viscous solution of silicate. Some pyrometallurgy and electrometallurgy approaches are also discussed.

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Section: Ree Recovery By Hydrometallurgymentioning

confidence: 99%

Rare Earth Elements Recovery from Waste Fluorescent Lamps: A Review

Tan

Zeng

2014

Critical Reviews in Environmental Science and Technology

206

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“…Bifunctional ionic liquid extractants show promise for the recovery of REEs, as pointed out by tests carried out using simulated tri-band phosphor powder (Yang et al, 2012). The extractants were prepared from Aliquat 336, HDEHP and HEHEHP and the extraction was carried out from nitric acid media.…”

Section: Solvent Extraction Of Reesmentioning

confidence: 99%

Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations

et al. 2015

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“…The third phase in [A336][Cyanex272] system was eliminated as the reference method to integrate it with the upper phase [55]. In addition, 50 % (v/v) TBP was dissolved in n-heptane as the organic phase in the extraction process, and there was no third phase in the resulting loaded phase.…”

Section: Ionic Liquid Microemulsionmentioning

confidence: 99%

Ionic Liquid-Assisted Hydrothermal Synthesis of Rare Earth Luminescence Materials

Song

Deng

Chen

et al. 2016

Green Chemistry and Sustainable Technology

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The shape control of nano-and microcrystals has received considerable attention because the morphology, dimensionality, and size of materials are well known to have great effects on their physical and chemical properties, as well as on their applications in optoelectronic devices. Ionic liquids were found to be very advantageous in synthetic nanochemistry, especially as templates and capping agents. Their particular phase behavior and unique physicochemical properties, including complex solvation interactions with organic and inorganic compounds, can provide various growth pathways for nanocrystals with novel morphologies and properties. This chapter gives an overview of existing ionic liquid-assisted hydrothermal method for the synthesis of rare earth luminescence materials. Particular attention is given to synthesis mechanism and the role of ionic liquids in the formation of specific morphology, as well as the effect of morphology on the luminescent properties.

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Recovery of rare earth elements from simulated fluorescent powder using bifunctional ionic liquid extractants (Bif‐ILEs)

Cited by 90 publications

References 34 publications

Rare Earth Elements Recovery from Waste Fluorescent Lamps: A Review

Rare Earth Elements Recovery from Waste Fluorescent Lamps: A Review

Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations

Ionic Liquid-Assisted Hydrothermal Synthesis of Rare Earth Luminescence Materials

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