Separation of La(III), Eu(III), and Ho(III) with Sorbents Impregnated by Mixtures of Acidic Phosphoryl Podands and Amines in Nitric Acid Solutions

Kovalenko, Olga; Баулин, В. Е.; Баулин, Д. В.; Tsivadze, A. Yu.

doi:10.1080/07366299.2019.1637055

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…An alternative approach that lacks these disadvantages is extraction chromatography, which uses solvent impregnated resins (SIRs), where extractant is retained in pores and on the surface of inert carriers due to non-covalent forces. The efficiency of the extraction chromatography method for REE recovery from solutions of various compositions has been demonstrated in numerous studies [23][24][25][26][27][28]. To obtain impregnated resins, it is important to search for new extractants, which could increase the capacity of resins toward REE extraction and improve their separation efficiency with respect to other elements that are included in compositions of NdFeB magnets.…”

Section: Introductionmentioning

confidence: 99%

Composite Resins Impregnated by Phosphorus Organic Extractants for Separation of Rare Earth Elements from Nitrate-Based Leachate of Permanent Magnets

Kovalenko,

Baulin,

Shulga

et al. 2023

Materials

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Composite resins impregnated by different organophosphorus extractants were developed and used for the extraction chromatography recovery of rare earth elements from nitrate-based leachate of NdFeB permanent magnets. The influence of different factors on recovery of Nd(III) and Fe(III), as the most difficult to separate elements, by developed resins was studied. The influence of extractant structure, the composition of feed solutions, and concentrations of HNO3 and NH4NO3 on the recovery of Fe(III) and Nd(III) by prepared resins were considered. The best recovery of Nd(III) was shown by resin impregnated with N,N-dioctyl (diphenylphosphoryl) acetamide. For this material, sorption characteristics (values of the distribution coefficient, capacity, and the Nd(III)/Fe(III) separation factor) were obtained, and the reproducibility of the loading–stripping process was evaluated. This resin and its precursors were characterized by IR spectroscopy. It was found that the developed resin is more efficient for Nd(III) recovery than resin impregnated with TODGA. An effective approach to the Nd(III)/Fe(III) separation with developed resin in nitrate solution was proposed. This approach was used for recovery of Pr(III), Nd(III), and Dy(III) from the nitrate-based leachate of NdFeB magnets by the developed resin. The final product contained 99.6% of rare earths.

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Section: Introductionmentioning

confidence: 99%

Composite Resins Impregnated by Phosphorus Organic Extractants for Separation of Rare Earth Elements from Nitrate-Based Leachate of Permanent Magnets

Kovalenko,

Baulin,

Shulga

et al. 2023

Materials

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“…REEs can be classified into light, medium and heavy types according to the electron configuration of each rare earth element and the solubility of their sulfates (Chi & Wang, 2014). La, Ce, Pr and Nd belong to light REEs, while Sm, Eu, Gd, Tb and Dy are medium REEs and the rest of the elements Ho, Er, Tm, Yb, Lu and Y are classified as heavy REEs (Arrambide et al, 2019;Chen et al, 2018;Kovalenko et al, 2019). There are two main types of REEs ore; mineral-type ore and weathered crust elutiondeposited type ore (Zhang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Process mineralogy of Bayan Obo rare earth ore by MLA

Xu¹,

Chi²,

Zhang³

et al. 2020

Physicochem. Probl. Miner. Process.

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The maximum recovery of rare earth resource from the Bayan Obo ore deposit is a difficult task, especially without the sufficient data of mineralogy. In this paper the mineralogy of Bayan Obo ore deposit by comprehensively research with the application of mineral liberation analyzer (MLA) is reported. The MLA was applied to quantitatively analyze the complicated element/mineral compositions, the REE occurrence, the size distribution and the degree of liberation of the Bayan Obo ore. Mineralogical analysis of the rare earth ore has shown that REEs are present mainly as bastnaesite and monazite-(Ce) to a small extent as parisite-(Ce). 5.85% of the REEs, 34.99% of iron and 0.12% of niobium occur in the ore sample. There are 76.99% of iron occurred in hematite and the remaining iron is mainly distributed in magnetite and goethite. The degree of liberation of bastnaesite and monazite-(Ce) was 79.65% and 75.67% respectively when the grinding fineness was 83.57% passing 75 µm sieves. Un-liberated or partly liberated rare earth minerals are associated closely mainly with other rare earth minerals and gangues. These theoretical data could be employed to further comprehensively utilize the rare earth ore.

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Recovery of rare earth elements from uranium leach liquors by adsorption with diglycolamic acid ligands and ionic liquids

et al. 2021

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Separation of La(III), Eu(III), and Ho(III) with Sorbents Impregnated by Mixtures of Acidic Phosphoryl Podands and Amines in Nitric Acid Solutions

Cited by 4 publications

References 24 publications

Composite Resins Impregnated by Phosphorus Organic Extractants for Separation of Rare Earth Elements from Nitrate-Based Leachate of Permanent Magnets

Composite Resins Impregnated by Phosphorus Organic Extractants for Separation of Rare Earth Elements from Nitrate-Based Leachate of Permanent Magnets

Process mineralogy of Bayan Obo rare earth ore by MLA

Recovery of rare earth elements from uranium leach liquors by adsorption with diglycolamic acid ligands and ionic liquids

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