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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY · 2021 ·Vol. 331 ·期 1 ·365-373 · IF 1.371

An experimental study on the extraction mechanisms of Ce(IV) from HNO3 solutions using C4mimNTf2 as extractant

Li Chunhui,He Hui,He Mingjian,Gao Yang,Zhang Meng,Jiao Caishan

A detailed extraction equilibrium study is experimentally performed to understand the extraction mechanisms of Ce(IV) by 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C 4 mimNTf 2 ) in 1,2-dichloroethane. Further, the influence of adding TBP on the distribution ratio is investigated and demonstrated. The ceric aqueous chemistry in the nitric acid solution and slope analysis are combined to reveal the extraction mechanism. The monovalent anionic complex HCe(NO 3 ) 6 − is the dominant species, which extracted by C 4 mimNTf 2 . Importantly, this study demonstrates the antagonistic effect between TBP and C 4 mimNTf 2 on the extraction process.

CAS / MDL: 1310-73-2

研究领域: 化学 · 材料科学 · 环境科学

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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY · 2025 · IF 1.6

Selective extraction of lanthanides (La, Nd, Eu and Dy) from uranium-containing acidic solution utilizing bisdiglycolamide ligand

Ren Peng,Yang Yang,Liu Dai,Guan Cheng-peng,Huang Pin-wen,Qi Ming

A novel extraction process utilizing THEE-BisDGA ligand has been developed for the rapid and efficient recovery of trivalent lanthanide elements (La, Nd, Eu, and Dy) from uranium-containing acidic systems. The process rapidly achieves equilibrium within just 2 min and exhibits high distribution ratios. Notably, its extraction efficiency shows a positive correlation with the atomic number of the lanthanides. Significantly, the ligand demonstrates exceptional selectivity by excluding U(VI) extraction, thus enabling the targeted recovery of lanthanides. Back-extraction experiments confirm that 0.01 M HNO 3 can quantitatively strip lanthanides in three steps, highlighting its potential for industrial-scale separation and purification of valuable lanthanides. Moreover, density functional theory(DFT) calculations have confirmed that THEE-BisDGA exhibits superior selectivity for Ln(III) over U(VI), further reinforcing its effectiveness and applicability in advanced separation technologies.

CAS / MDL: 107-06-2 111-87-5 8008-20-6 75-09-2 100587-94-8

研究领域: 化学工程 · 无机化学 · 分离科学 · 材料科学 · 核化学

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GREEN CHEMISTRY · 2013 ·Vol. 15 ·期 7 ·1941-1948 · IF 6.828

Selective separation of aliphatic and aromatic amines with CO2 switchable ionic liquids aqueous two-phase systems

Dazhen Xiong,Zhiyong Li,Huiyong Wang,Jianji Wang

In many practical processes, separation of aliphatic amines from aromatic amines in water is imperative to obtain the desired products. In this work, a novel strategy was proposed for selective separation of aliphatic amines from aromatic amines with CO2 switchable ionic liquids (ILs) aqueous two-phase systems (ATPSs). It was shown that upon introduction of CO2 into an aqueous solution containing the IL, aliphatic amine and aromatic amine at 25 °C and atmospheric pressure, an ATPS could be formed with an IL-rich top phase and an ammonium-salt-rich bottom phase. Under these circumstances, the aromatic amine was largely partitioned in the IL-rich phase, while the aliphatic amine was transformed into the ammonium salt by the reaction with CO2. Thus the aliphatic amine was well separated from the aromatic amine in aqueous solution. The distribution ratios of aromatic amines between the two phases were found to increase with increasing hydrophobicity of ILs and aromatic amines, pKa values of aliphatic amines and tie-line length of the systems. Moreover, aliphatic amines retained in the ammonium-salt-rich phases were regenerated by bubbling N2 under heating, while aromatic amines in the IL-rich phases were removed by simple steam distillation. The recovery efficiency for aliphatic amines was as high as 99.0%. The regenerated ILs could then be reused in the next separation process, and no decrease in the distribution ratios of aromatic amines was observed after six cycles.

研究领域: 分析化学 · 分离科学 · 绿色化学 · 溶液化学 · 环境功能材料

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An experimental study on the extraction mechanisms of Ce(IV) from HNO3 solutions using C4mimNTf2 as extractant

Selective extraction of lanthanides (La, Nd, Eu and Dy) from uranium-containing acidic solution utilizing bisdiglycolamide ligand

Selective separation of aliphatic and aromatic amines with CO2 switchable ionic liquids aqueous two-phase systems