JOURNAL OF MOLECULAR LIQUIDS
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2020
·
IF 5.065
Min Wang,Qi Wang,Yuqi Geng,Ning Wang,Yanzhao Yang
In this paper, a novel ionic liquid ([ACh][Tf 2 N]) was synthesized and applied for gold separation from secondary resources, which can be employed as both hydrophobic phase and extractant in the extraction process. By modulating various parameters, the extraction behavior of gold(III) under various conditions was investigated. The result shows that it is more suitable for gold(III) extraction with high salinity and lower acidity, whereas the extraction efficiency can reach 98.98% in 5 min. The anion exchange mechanism between [ACh][Tf 2 N] and gold(III) was proved by UV–vis, FT-IR, 13 C NMR and quantum chemical calculations . The gold(III) in organic phase was easily stripped by 1 mL 0.05 M CS(NH 2 ) 2 /0.1 M HCl. [ACh][Tf 2 N] also possesses excellent selectivity for gold(III) in the mixed metal solutions. Furthermore, its operating conditions combination: ionic liquid dosage, the concentration of HCl and NaCl were optimized to 0.55 g, 0.5 M and 2.5 M by response surface methodology (RSM), respectively. Hence, the [ACh][Tf 2 N] was regarded as a potential extractant for gold recovery from secondary resources.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2015
·Vol. 308
·期 2
·573-578
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IF 1.034
Xie Zong-Bo,Kang Hai-Tao,Chen Zhong-Sheng,Zhang Sui-Hong,Le Zhang-Gao
The extraction behavior of U(VI) from nitric acid medium by a solution of N , N -dimethyl- N , N -diphenylmalonamide (DMPMA) in the ionic liquid, BmimPF 6 , was studied. The extractability was measured as a function of various parameters such as kinetics, phase ratio, the concentration of DMPMA, nitric acid and sodium nitrate, alkyl chain length of ionic liquid. The extractability from 5 M nitric acid by 0.35 M DMPMA/BmimPF 6 was found to be almost 100 %. Slope analysis of the experimental data suggests that the probable molecular structure of the extraction species is [UO 2 NO 3 (DMPMA) 2 ] + , and the mechanism likely occurs by a cation exchange mode.
研究领域:
化学
·
核化学与放射化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2017
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IF 2.323
Hai Liu,Xuemin Yu,Peng Cui,Midong Shi,Kun Xin,Yingmin Yu,Qingsong Li
Liquid–liquid equilibria provide fundamental data for designing and simulating a proper extraction process. The aim of this work is to extract cyclohexanone from wastewater using appropriate solvents. Liquid–liquid equilibrium experimental results were measured for water + cyclohexanone + benzene or methyl isobutyl carbinol ternary systems at 303.15 and 323.15 K under 101.3 kPa. The distribution ratios as well as selectivity values were calculated according to the experimental data to assess the extracting behaviors of the selected solvents. The selectivity value has a slight decrease with the increasing temperature from 303.15 to 323.15 K, which indicates that temperature has an adverse effect and the low temperature is more suitable for extraction. Besides, the consistency and reliability of the obtained experimental results were ascertained by applying both the Hand and Bachman equations. The obtained experimental tie-line data fitted well with the nonrandom two-liquid and universal quasichemical activity coefficient models, yielding root-mean-square deviation (rmsd) values as low as 0.17 and 0.16 for the two models, respectively.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2016
·
IF 3.299
Yunchang Fan,Xiaojing Li,Lingling Yan,Jing Li,Shaofeng Hua,Lufei Song,Rupeng Wang,Shengnan Sha
In this work, the extraction behavior of the three antioxidants, gallic acid (GA), vanillic acid (VA) and syringic acid (SA) by a series of hydrophobic ionic liquids (ILs) was investigated. The experimental results indicated that the extraction ability of the ILs highly depended on their chemical structures and the hydrophobicity of the three acids. For the ILs with perchlorate (ClO 4 − ) as anion, the introduction of hydroxyl group on the cation improved significantly the extraction ability of ILs for GA. For the extraction of VA and SA, the hydrophobic interaction between ILs and VA or SA should also be considered. Thermodynamic analysis confirmed that hydrogen bonding was the main driving force underlying the transfer of the three acids from water to the IL phase. The three acids and ILs could be recovered and recycled, respectively by taking the advantage of pH dependence of the extraction efficiencies. These results suggested the ILs containing perchlorate anion exhibited potential applications in extraction of the three antioxidants from aqueous phase.
研究领域:
化学
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食品科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 45
·27969-27977
·
IF 3.361
Yaoyang Liu,Sheng Liu,Zhibin Liu,Chuang Zhao,Chunhui Li,Yu Zhou,Caishan Jiao,Yang Gao,Hui He,Shaowen Zhang
A novel asymmetric diglycolamide N,N-dimethyl-N′,N′-dioctyl diglycolamide (LII) was synthesized. The Nd(III) extraction behavior from HNO3 and loading capability of the solution of LII in 40/60 (v/v)% n-octanol/kerosene were studied. Analyses by the slope method, ESI-MS, and FT-IR indicated that, similar to the previously studied isomer ligand N,N′-dimethyl-N,N′-dioctyl diglycolamide (LI), 1 : 3 Nd(III)/LII complexes formed. Under the same experimental conditions, the distribution ratio and limiting organic concentration of LII towards Nd(III) were smaller than those of LI, but the critical aqueous concentration of LII was larger, which implies that LII exhibited poorer extraction and loading capabilities towards Nd(III) than LI, and LII has a tendency to be less likely to form the third phase. The quasi-relativistic density functional theory (DFT) calculation was performed to provide some explanations for the differences in their extraction behaviors. The electrostatic potential of the ligands indicated that the electron-donating ability of the amide O atoms in LII displayed certain differences compared with LI. This inhomogeneity in LII affected the interaction between LII and Nd(III), as supported by QTAIM and bonding nature analysis, and it seemed to reflect in the extraction performance towards Nd(III).
研究领域:
化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
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