Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

Safarbali, Reyhaneh; Yaftian, Mohammad Reza; Zamani, Abbasali; Ghorbanloo, Massomeh

doi:10.1007/s13738-016-0926-7

Cited by 4 publications

(1 citation statement)

References 39 publications

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“…Up to date, various types of extractants have been developed and applied in hydrometallurgy of REs. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Among these extractants, carboxylic acids are promising and have been applied in REs hydrometallurgy for years. However, the extraction ability of carboxylic acids is not satisfactory, and structure optimization and synergistic extraction systems have been adopted to improve the extraction ability of carboxylic acids.…”

Section: Introductionmentioning

confidence: 99%

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Zhang

Guo

et al. 2021

ChemistrySelect

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A novel extractant, 2‐(2‐heptanoylphenoxy)acetic acid (HA), was synthesized and applied to extract La, Ce, Pr, and Nd from the hydrochloric acid solution. The extraction parameters including pH, temperature, concentrations of HA and chloride ion were investigated and discussed in detail. The extraction mechanism was studied with Fourier‐transform infrared (FT‐IR) spectroscopy. Compared with the extractant of sec‐octylphenoxy acetic acid (CA12), HA showed excellent performance and different extraction order in extracting La, Ce, Pr, and Nd. All the rare‐earth metals (REs) were extracted by the cation exchange mechanism and loaded as REs(A)3. The stripping test showed that the loaded REs in the organic phase can be effectively stripped with sulfuric acid at medium acidity. This work revealed that HA is an effective extractant for REs.

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Section: Introductionmentioning

confidence: 99%

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Zhang

Guo

et al. 2021

ChemistrySelect

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Crown ether complexes of actinyls: a computational assessment of AnO₂(15-crown-5)²⁺(An = U, Np, Pu, Am, Cm)

Liang

et al. 2017

Dalton Trans.

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For further fundamental understanding of the nature and extent of covalency in actinyl-ligand bonding, and the benefits that this may have in the design of new ligands for nuclear waste separation, there is burgeoning interest in the nature of actinyl complexes with polydentate or multiple-point-donor ligands, such as crown ethers. There are few cases of structurally authenticated molecular actinyl-crown bonds under ambient conditions. We report here the computational characterization of AnO-(15-crown-5) complexes, where An = U, Np, Pu, Am, and Cm, and 15-crown-5 is the cyclic polyether ligand with five ether oxygen atoms. In the gas-phase complex, the actinyl group is located inside of the crown ether, tilted slightly out of the plane of the five equatorial oxygen atoms that coordinate the actinide metal center. The actinyl-cyclic ether complexes are found to exhibit a conventional conformation, with typical An-O and An-O distances and angles. A striking result is the enhanced stability of the insertion complex for UOversus NpO, PuO, AmO and CmO, which is evaluated in the context of An-O binding strengths (esp. bonding covalency), and may have ramifications for the utility of actinyl-crown complexes in separation applications.

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Synthesis and characterization of trans-di(nitrobenzo)- and di(aminobenzo)-18-crown-6 derivatives with high selectivity

Zhang

et al. 2018

Synthetic Communications

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Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

Cited by 4 publications

References 39 publications

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Crown ether complexes of actinyls: a computational assessment of AnO₂(15-crown-5)²⁺(An = U, Np, Pu, Am, Cm)

Synthesis and characterization of trans-di(nitrobenzo)- and di(aminobenzo)-18-crown-6 derivatives with high selectivity

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Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

Cited by 4 publications

References 39 publications

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Crown ether complexes of actinyls: a computational assessment of AnO2(15-crown-5)2+(An = U, Np, Pu, Am, Cm)

Synthesis and characterization of trans-di(nitrobenzo)- and di(aminobenzo)-18-crown-6 derivatives with high selectivity

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Crown ether complexes of actinyls: a computational assessment of AnO₂(15-crown-5)²⁺(An = U, Np, Pu, Am, Cm)