The development of sustainable yttrium separation process from rare earth enrichments using bifunctional ionic liquid

Wang, Yanliang; Huang, Chao; Li, Fujian; Dong, Yamin; Zhao, Zeyuan; Sun, Xiaoqi

doi:10.1016/j.seppur.2016.01.042

Cited by 50 publications

(10 citation statements)

References 33 publications

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“…Briefly, tremendous Cl − led to the generation of [N1888]Cl• MCl 2 [CA12], dissolving in the organic phase as shown in eq 5. 21 From the point of the organic phase, Cl − of NaCl was coextracted with Al(Gd) as a typical salting-in effect. However, the solubility of Al(Gd) reduces upon salt addition due to the salting-out effect from the perspective of aqueous solution.…”

Section: Resultsmentioning

confidence: 99%

“…2,17,26 The drawbacks can be concluded as large solubility in water, introduction of new impurities, component complexity, and production of tremendous wastewater. With respect to the papers, 21 The yield of Gd is a critical factor in the purification process; it cannot be evaluated in relatively short stages and operating time. However, we find that the only path of Gd loss was the exit of the IL phase and a high yield could be achieved by…”

Section: Stripping Property Of the Loaded [N1888][ca12]mentioning

confidence: 99%

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Removal of Trace Aluminum Impurity for High-Purity GdCl₃ Preparation using an Amine-Group-Functionalized Ionic Liquid

Yan

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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Aluminum, as an associated metal with rare-earth resources, is a common impurity in rare-earth separation products. In the traditional P507-kerosene-HCl system, tremendous aluminum impurity (8875 mg/L herein) is often enriched in GdCl 3 solutions because of the similar extraction sequence during rare-earth separation. In this work, a new amine-groupfunctionalized ionic liquid (IL) was developed to remove trace aluminum impurity from high-purity GdCl 3 solutions, overcoming the drawbacks of strong hydrophilicity and complicated compositions of the organic phase, as well as other impurities introduced and tremendous saline wastewater produced inevitably. Methyltrioctylammonium hydroxide (N1888OH), instead of the water soluble ammonium hydroxide (NH 4 OH), was used to dissociate the dimer of sec-octylphenoxy acetic acid (CA12) and synthesize cation-and anion-bifunctionalized IL [N1888][CA12]. The separation factor of Al/Gd was as high as 36. The influences of pH, saltingout agent, extraction time, temperature, and stripping efficiency on the extraction efficiency were evaluated. The result showed that high-purity GdCl 3 solution was obtained with low aluminum impurity of 10 ppm after five-stage countercurrent extraction. Due to the weak interaction between the metal and IL, very dilute HCl solution (0.07 mol/L) and NaOH solution (0.07 mol/L) were in favor of metal stripping and IL regeneration.

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Section: Resultsmentioning

confidence: 99%

Section: Stripping Property Of the Loaded [N1888][ca12]mentioning

confidence: 99%

Removal of Trace Aluminum Impurity for High-Purity GdCl₃ Preparation using an Amine-Group-Functionalized Ionic Liquid

Yan

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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“…[Tri- n -octylmethylammonium][bis-sec-octylphenoxyl acetate] ([N 1888 ][SOPAA]) and [trihexyl (tetradecyl) phosphonium][sec-octylphenoxy acetate] ([P 6,6,6,14 ][SOPAA]) (Figure ) were prepared using the combination of ion-exchange and neutralizing reactions (as described in the Supporting Information). (2-s-Octylphenoxy) acetic acid (HSOPAA, CA-12) was purchased from Luoyang Aoda Chemical Co. Ltd. (China) without any purification. The 260# kerosene used as diluent was provided by Shanghai Rare-earth Chemical Co., Ltd. (China).…”

Section: Methodsmentioning

confidence: 99%

Efficient and Sustainable Regeneration of Bifunctional Ionic Liquid for Rare Earth Separation

Huang

Dong

et al. 2017

ACS Sustainable Chem. Eng.

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An effective and sustainable strategy of regeneration is important for the industrial application of functionalized ionic liquid in hydrometallurgy. The transformations of [tri-n-octylmethylammonium][bis-sec-octylphenoxyl acetate] ([N1888][SOPAA]) and [trihexyl (tetradecyl) phosphonium][sec-octylphenoxy acetate] ([P6,6,6,14][SOPAA]) under acidic and alkaline conditions were investigated. This paper developed a novel approach for sustainable stripping and efficient regeneration of acid–base coupling bifunctional ionic liquid (ABC-BIL) for rare earth element (REE) separation. After the stripping using deionized water, both NaOH and Na2C2O4 were indicated to be effective for the regeneration of organic phase containing [N1888][SOPAA]. In order to recycle REE, the precipitates of REE(OH)3 and REE2(C2O4)3 were analyzed, and a sedimentation–calcination strategy was proposed. The investigation of sedimentation–calcination also offered a promising method for the preparation of REE nanomaterial.

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“…Materials such as graphene, polymers with intrinsic microporosity, imprinted polymers and zeolites are used as adsorbents for sustainable wastewater treatment [ 7 ]. Moreover, sustainable adsorption separations technology is also applied in the enrichment of rare earth [ 8 ], oleuropein [ 9 ] and lactic acid recovery [ 10 ]. Recently, bio-based materials have been paid increasing attention due to their applications in environmental remediation and other fields [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Removal of Multiple Dyes Using Biogenic Selenium Nanoparticles from an Escherichia coli Strain Overexpressed Selenite Reductase CsrF

Xia

Zhou

et al. 2018

Nanomaterials

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Selenite reductase CsrF overexpressed Escherichia coli was used as a microbial factory to produce Se(0) nanoparticles (Bio-SeNPs). The Bio-SeNPs were characterized by transmission electronic microscopy, element mapping, scanning electron microscopy, energy-dispersive X-ray spectrographs, Zeta-potential, dynamic light scattering, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses. The results indicated that Bio-SeNPs are irregular spheres with diameters from 60 to105 nm and mainly consist of Se(0), proteins and lipids. Furthermore, it exhibited maximum adsorption capacity for anionic dye (congo red) at acidic pH and cationic dyes (safranine T and methylene blue) at alkaline pH. To gain more insight, adsorption kinetics, adsorption isotherms and adsorption thermodynamics studies were carried out. These results showed that the adsorption capacities of congo red, safranine T and methylene blue were 1577.7, 1911.0 and 1792.2 mg/g, respectively. These adsorption processes were spontaneous and primarily physical reactions. In addition, Bio-SeNPs can be effectively reused by 200 mmol/L NaCl. To the best of our knowledge, this is the first report of adsorption removal dyes by Bio-SeNPs. The adsorption capacities of Bio-SeNPs for congo red, safranine T and methylene blue were 6.8%, 25.2% and 49.0% higher than that for traditional bio-based materials, respectively.

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The development of sustainable yttrium separation process from rare earth enrichments using bifunctional ionic liquid

Cited by 50 publications

References 33 publications

Removal of Trace Aluminum Impurity for High-Purity GdCl₃ Preparation using an Amine-Group-Functionalized Ionic Liquid

Removal of Trace Aluminum Impurity for High-Purity GdCl₃ Preparation using an Amine-Group-Functionalized Ionic Liquid

Efficient and Sustainable Regeneration of Bifunctional Ionic Liquid for Rare Earth Separation

Adsorption Removal of Multiple Dyes Using Biogenic Selenium Nanoparticles from an Escherichia coli Strain Overexpressed Selenite Reductase CsrF

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The development of sustainable yttrium separation process from rare earth enrichments using bifunctional ionic liquid

Cited by 50 publications

References 33 publications

Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid

Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid

Efficient and Sustainable Regeneration of Bifunctional Ionic Liquid for Rare Earth Separation

Adsorption Removal of Multiple Dyes Using Biogenic Selenium Nanoparticles from an Escherichia coli Strain Overexpressed Selenite Reductase CsrF

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Removal of Trace Aluminum Impurity for High-Purity GdCl₃ Preparation using an Amine-Group-Functionalized Ionic Liquid

Removal of Trace Aluminum Impurity for High-Purity GdCl₃ Preparation using an Amine-Group-Functionalized Ionic Liquid