Recovery of REEs from leaching liquor of ion-adsorbed-type rare earths ores using ionic liquid based on cooking oil

Li, Fujian; Zhong, Xiaoyan; Zeng, Jingyao; Chen, Jinqing; Sun, Xiaoqi

doi:10.1016/j.hydromet.2020.105449

Cited by 16 publications

(3 citation statements)

References 32 publications

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“…The metal extraction and stripping experiments were performed following the method reported in a paper …”

Section: Methodsmentioning

confidence: 99%

“…The NMR peaks are as follows: The metal extraction and stripping experiments were performed following the method reported in a paper. 19 The continuous purification was performed in a five-stage centrifugal extractor with countercurrent extraction. GdCl 3 solution with high Al impurity was led at stage 1 and GdCl 3 solution with low Al was led out at stage 5, while the IL was injected at stage 5 and flowed out at the stage 1-loaded metal.…”

Section: Il Synthesis [N1888]mentioning

confidence: 99%

“…To overcome these weaknesses, an amine-group-functionalized ionic liquid (IL) was synthesized for Al removal from GdCl 3 solution, based on our previous work. − Strongly hydrophobic −NR 4 (like −NH 4 from NH 4 OH) provided by quaternary ammonium hydroxide was introduced to bond with RCOO– of the acidic extractant for IL synthesis. Taking the industrially separated product as feed solutions, the aluminum impurity was removed for high-purity GdCl 3 preparation with the IL [N1888][CA12] (Figure ).…”

Section: Introductionmentioning

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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“…The metal extraction and stripping experiments were performed following the method reported in a paper …”

Section: Methodsmentioning

confidence: 99%

Section: Il Synthesis [N1888]mentioning

confidence: 99%

Section: Introductionmentioning

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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Ionic Liquids for the Processing of Rare Earth Elements

Larochelle

2023

Rare Earth Metals and Minerals Industries

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The rare earth element (REE) potential of the Philippines

Gibaga¹,

Samaniego²,

Tanciongco³

et al. 2022

Journal of Geochemical Exploration

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Recovery of REEs from leaching liquor of ion-adsorbed-type rare earths ores using ionic liquid based on cooking oil

Cited by 16 publications

References 32 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

Ionic Liquids for the Processing of Rare Earth Elements

The rare earth element (REE) potential of the Philippines

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Recovery of REEs from leaching liquor of ion-adsorbed-type rare earths ores using ionic liquid based on cooking oil

Cited by 16 publications

References 32 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

Ionic Liquids for the Processing of Rare Earth Elements

The rare earth element (REE) potential of the Philippines

Contact Info

Product

Resources

About

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