SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Qiyu Meng,Jiemiao Yu,Liangrong Yang,Yanqing Li,Mo Xian,Huizhou Liu
Effective isolation of 1,2,4-butanetriol (BT) from the fermentation broth with low BT concentration was achieved based on anionic reactive extraction with a combined extractant consisted of boronic acid carrier and trioctylmetylammonium Aliquat® 336 (A336) dissolved in the organic phase. The influence of various diluents, pH values, the ratio of phenylboronic acid derivatives (PBAD) to BT (α PBAD/BT ), and A336 to BT (β A336/BT ) on extraction property was investigated in detail. For model BT solutions, satisfactory extraction efficiency of 92% was obtained under the conditions of α PBAD/BT = 1.5, β A336/BT = 2, with dichloromethane as a diluent. Aqueous hydrochloric acid solutions were employed to strip BT from the organic phase. For actual fermentation broth, the extraction and stripping efficiency under the optimum conditions were 74% and 69%, respectively. Besides, compared with the original fermentation broth, 1,2,4-butanetriol has been concentrated by 4.6 times with the reactive extraction coupled hydrolysis.
研究领域:
化学工程
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生物技术
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
Minerals
·
2025
·Vol. 15
·期 2
·153
·
IF 2.2
Kejia Ning,Jingzheng Wang,Li Zhang,Mengting Hong,Biao Fu,Jiushuai Deng,Xiahui Gui,Yaowen Xing,Guixia Fan,Hongxiang Xu
This systematic study was conducted on the separation of yttrium (Y) and erbium (Er) from a chloride medium using a mixed extractant system composed of [N1444][P507] and TRPO (trialkylphosphine oxide) in kerosene. This investigation focused on the effects of various extractants, extraction systems, the initial acidity of the aqueous phase, and the phase contact time on the extraction efficiencies of Y and Er. This study showed that using the combination of [N1444][P507] and TRPO notably increased the extraction performance and enhanced the separation factor between Y and Er, outperforming the individual use of P507 or [N1444][P507] under identical conditions. The extraction efficiencies for Y and Er reached 88.4% and 93.3%, respectively, with a separation factor (Er/Y) of 1.84, highlighting the system’s effectiveness in selectively isolating rare earth elements. Optimal stripping conditions were obtained using 0.1 mol/L of HCl, resulting in a successful recovery of 93.1% of Y3+and 78.9% of Er3+from the organic phase. The extraction mechanism involved both ion exchange and ion association. The enthalpy changes (ΔH) associated with the extraction of Y3+(−2.5 kJ·mol−1) and Er3+(4.6 KJ·mol−1) demonstrate that the extraction processes are exothermic, reflecting the thermodynamic differences between the two ions.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
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2021
·
IF 3.712
Ye Zhang,Yong Gao,Peng Wang,Duo Na,Zhenming Yang,Jinsong Zhang
Extraction reactor is a major research area of interest within the field of rare earths extraction and separation. SiC foam offers excellent material characteristics as well as three-dimensional (3-D) reticulated structure; however, very little research has been carried out on its application in extraction reactor so far. In this work, a static mixer reactor based on SiC foam was designed and demonstrated to extract and separate Ce(III) and Pr(III) from nitric acid media by using 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (P507) as extractant. The structure–performance relationship between SiC foam and extraction performance was studied by experiment combined with computational fluid dynamics (CFD) simulation. The experiment data are in good agreement with the simulation results. Contrast experiment by using a Kenics mixer was carried out, and SiC foam shows better extraction and mass transfer performance. Using the optimal structural SiC foam (pore size D = 2.3 mm, open porosity ε = 85%, foam length L = 80 mm), high extraction efficiency η (Pr(III): 94.6%, Ce(III): 88.5%) and separation factor β (2.27) between Ce(III) and Pr(III) is achieved at a high total throughput of 200 mL/min. Besides, overall volumetric mass transfer coefficient K L a of Pr(III) and Ce(III) are 0.519 and 0.378 s −1 at the residence time τ of 3.6 s, respectively, which reach the high level of microchannel reactors and are better than conventional extractors and other static mixers. SiC foam is found to be applicable as a static mixer for efficient and high-throughput extraction and separation of rare earths.
研究领域:
稀土提取
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分离工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yingtong Lv,Ru Cheng,Guolin Yang,Wang Liu,Jingye Zhang,Xiaofang Yu,Wencai Bai,Rong He,Wenkun Zhu
Photocatalytic extraction of hexavalent uranium (U(VI)) is challenging in organic phase, especially the widely used tributylphosphate (TBP)-kerosene system in the nuclear fuel cycle process. Organic components in TBP-kerosene system are difficult to be oxidized, which limits the reduction of U(VI). Herein, we demonstrated a self-oxidation strategy to enable the photocatalytic cycle of U(VI) reduction in TBP-kerosene system by the deeply oxidized commercial red phosphorus (DO-CRP). In the 30 %TBP-kerosene solution, the DO-CRP exhibited 88.0 % of extraction efficiency with 580.8 mg/g of capacity for U(VI) within 120 min. In this process, PO 4 3− groups generated at the defects were used as the binding sites to capture and reduce U(VI). Following desorption process involved in the cleavage of uranium and PO 4 3− groups, which released defect sites for self-oxidation in the next cycle. Mechanistic study revealed that such regeneration of self-oxidation and U(VI) binding sites achieved the continuous photocatalytic extraction of U(VI) in TBP-kerosene system.
研究领域:
化学工程
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核能科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Yuehua Chen,Huiyong Wang,Yuanchao Pei,Jianji Wang
It is always difficult to separate scandium from yttrium and lanthanides due to their similar physicochemical properties. In this work, a selective separation strategy for Sc (III) from yttrium and lanthanides in aqueous solution was developed by using ionic liquids 1-alkylcarboxylic acid-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([(CH 2 ) n COOHmin][Tf 2 N]) (n = 3, 5, 7) as extractants and 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C n mim][Tf 2 N]) (n = 4, 6, 8, 10) ionic liquids as diluents. The extraction parameters such as phase valume ratio, equilibrium time, pH value of the aqueous phase, alkyl chain length of the extractants and diluents, and system temperature were investigated systematically. It was shown that the extraction efficiency of Sc (III) increased with the increase of aqueous phase pH value, and was as high as 99.5% at pH 4.2. Sc (III) could be extracted selectively from yttrium and lanthanides by simple tuning of pH value of the aqueous phase, and the separation factor was 10 3 . After the extraction, stripping of Sc (III) from the ionic liquids was attempted by using dilute aqueous HNO 3 . In addition, an ion exchange mechanism of the proton of extractants and the cation of the diluents was proposed from a series of control experiments. Since both the proton of the extractants and cation of the diluents participated in the extraction process, amount of the ionic liquids transferred to water phase can be greatly reduced compared with the cation exchange based metal extraction using only ionic liquid extractants.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Mingyang Liu,Dan Zou,Donghai Yu,Shaoji Xiang,Yuefeng Deng,Ji Chen,Jichang Xiao
Cyanex923 (a mixture of four trialkyl (hexyl and octyl) phosphine oxides) has been extensively employed in the recovery of cerium (Ce(IV)) and fluorine (F), as well as the separation over thorium (Th(IV)) from bastnaesite. However, rigorous production conditions and involvement of highly toxic raw materials (PH 3 ) have been critical problems to be solved during the synthesis of Cyanex923. Meanwhile, its extraction performance remains to be improved. Therefore, we attempted to adjust the feed ratio to increase the proportion of short carbon chain components, successfully synthesized a novel extractant (P113, a mixture of four trialkyl (hexyl and octyl) phosphine oxides) with contents of each component different from Cyanex923 using an environmentally benign method. The comparison with Cyanex923 revealed obvious improvement of P113 in terms of extraction efficiency, selectivity and saturation capacity. The extraction efficiency and saturation capacity of Ce(IV) were increased by 10% and 10 g L -1 , respectively. Separation factor of Ce(IV)/Th(IV) was increased from 16 to 27 at 2 mol L -1 H 2 SO 4 . Furthermore, P113 presented excellent regenerability. The superiority of P113 was theoretically explored using the density functional theory (DFT) and polarizable continuum model (PCM), and the results indicated that THPO (trihexyl phosphine oxide) had lower extraction phase transfer energy than TOPO (trioctyl phosphine oxide) from aqueous phase to organic phase. The comprehensive evaluation of P113 demonstrated the feasibility employed in the recovery of Ce(IV)-F and the separation of Th(IV) from bastnaesite, which advanced industrial application of the novel extractant, and held significant value for the utilization of resources and environmental protection.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Bharat Prasad Sharma,Razium Ali Soomro,Zhuojun Jiang,Jinping Xiong,Naveed Karim,Abdurohman Mengesa Yessuf,Liangrong Yang,Zheng Li
Solvent extraction (SX) has been recognized as an efficient approach for the large-scale removal of impurities, demonstrating considerable potential for fluoride extraction in industrial applications. However, existing fluoride extraction methods typically require the incorporation of additives to form complexes with fluoride for its removal. Due to the excessive additive requirements for efficient fluoride removal, these methods inevitably result in secondary contamination of feed solution, necessitating additional purification efforts to remove them. In this study, four extractants (trioctyl amine, tributyl phosphate, trioctyl phosphate, and trialkyl phosphine oxide (TRPO)) were investigated for fluoride removal via hydrogen bonding with hydrofluoric acid (HF). Various parameters, including the concentrations of extractants and stripping agents, pH values, extraction time, and temperature were initially optimized. It was found that TRPO exhibits the highest extraction efficiency for HF, with a single-stage extraction rate exceeding 70 %. Complete fluoride removal (> 99.9 %) was achieved through a consecutive four-stage extraction process. Further experiments, including maximum loading and slope analysis, combined with FT-IR and 19 F NMR characterization, and DFT calculations elucidate the mechanism of the extraction. The transfer of HF into the organic phase is accomplished by the formation of a 1:1 hydrogen-bonded complex with TRPO. The loaded fluoride in the organic phase can be easily stripped by a base to get a fluoride salt. This study paves the way for the construction of novel SX systems to remove fluoride as HF.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2014
·
IF 0
Qiwei Yang,Dan Xu,Jingzhu Zhang,Yaoming Zhu,Zhiguo Zhang,Chao Qian,Qilong Ren,Huabin Xing
The development of ionic liquids (ILs) with strong hydrogen-bond basicity is of great importance for the application of ILs in liquid–liquid extractions, but a long-standing problem is that the increase in hydrogen-bond basicity of ILs usually comes along with undesired changes in other properties such as reduced lipophilicity, raised melting point, and difficulty of forming biphasic systems with water. Herein, we provided a promising solution to this problem by synthesizing a class of functional phosphonium ILs with the use of biocompatible saturated/unsaturated long-chain fatty acids (carbon number up to 20) as anion precursors, and we also carried out systematic investigations on their physicochemical properties. These long-chain fatty acid ILs (LCFA-ILs) featured very strong hydrogen-bond basicity, up to the top level of all reported solvents, along with good lipophilicity and a wide liquid range. Moreover, the viscosity of LCFA-ILs exhibited only a slight increase with increasing chain length, and the hydrophilicity/hydrophobicity could be tuned by a change in the side chain of the phosphonium cation. Excellent extraction efficiency was achieved by applying LCFA-ILs to both aqueous and nonaqueous extractions. The distribution coefficients of specific solutes reached unprecedented values up to 3000–5000, which were 17–650 times higher than those by common ILs and molecular solvents.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
JOURNAL OF CHROMATOGRAPHY A
·
2020
·
IF 4.049
Yuwei Wang,Yuwang Jie,Qingkun Hu,Ying Yang,Yuxin Ye,Shichun Zou,Jianqiao Xu,Gangfeng Ouyang
A novel disposable styrene based solid-phase microextraction (SPME) fiber was synthesized for the detection of lipid-lowering and antihypertensive drugs in real aquatic environment. Styrene and poly(ethylene glycol) diacrylate were co-polymerized on quartz fibers by thermal polymerization in capillary molds. The polymeric fiber possessed a homogeneous, dense as well as porous surface, showing excellent chemical and mechanical stability. The performance of the fiber was evaluated through the extraction of seven pharmaceuticals by coupling SPME with high performance liquid chromatography-tandem mass spectrometry under the optimized extraction conditions. The extraction efficiency of the fiber was up to 278 times of PDMS fiber and the enrichment factors ranged from 55 to 1183. The limits of detection were in the range from 1.7 ng L −1 to 11.7 ng L −1 , with good reproducibility. Moreover, the fiber was used in the real water samples of the Pearl River Delta. The recoveries of the target analytes from river water and sea water samples at different spiked concentrations were in the range from 84.1% to 133.4% and from 81.5% to 105.5%, respectively.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2017
·
IF 2.605
Chenglong Shi,Yan Jing,Jiang Xiao,Xingquan Wang,Yongzhong Jia
A novel phosphonium ionic liquid (IL), tetrabutylphosphonium bis(2,4,4-trimethylpentyl)phosphinate([P 4444 ][BTMPP]), was prepared and characterized by NMR spectroscopy. The solvent extraction behavior of lithium from aqueous solution by this IL in toluene was investigated. The extraction behavior was carried out as a function of various parameters such as aqueous acidity, temperature and extractant concentration. The extraction efficiencies obtained in [P 4444 ][BTMPP] were compared with those observed in molecular extractant bis(2,4,4-trimethylpentyl) phosphinic acid (HBTMPP), from which the anion of the ionic liquid extractant was prepared. The extraction efficiency for extraction of lithium by [P 4444 ][BTMPP] was much higher than that for extraction by HBTMPP. The extracted species were ascertained from slop analysis method which indicated 1:1 (metal:ligand) ratio in the complex. In addition, the effects of thermodynamic parameters, the stripping of lithium from the ionic liquid, and the reusability of the phosphonium ionic liquid were studied in detail.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Analytical Methods in Chemistry
·
2018
·
IF 1.262
Rui Lv,Shuya Cui,Yangmei Zou,Li Zheng
Two thermoregulated dicationic ionic liquids were synthesized and applied for effective extraction of the common dye malachite green oxalate (MG). The extraction parameters such as amount of ionic liquids, pH of water phase, extraction time, cooling time, and centrifugal time on the extraction efficiency were investigated systematically. It revealed that the dye has been successfully extracted into the ionic liquids, with high extraction efficiency higher than 98%, and recovery of 98.2%–100.8%, respectively. Furthermore, these ionic liquids can be recycled easily after elution. The reusable yields were 87.1% and 88.7%. The extraction of the dye into the thermoregulated ionic liquid provides a method of minimizing pollution of waste water potentially.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Junxin Chen,Caijin Zhou,Bingqi Xie,Jisong Zhang
Counter-current operation has been widely applied to enhance the extraction efficiency for systems with low distribution coefficients, which was hindered in microextraction because viscous force and surface tension dominate over gravity and inertial force. In this study, a novel design of a tube-in-tube microextractor relying on a poly tetra fluoroethylene membrane to construct a stable interface was proposed to conduct continuous counter-current extraction. Extraction kinetics for two systems with different distribution coefficients, membranes with different pore radii, and three flow rate ratios were measured as a function of residence time. For the system that toluene was used to extract 0.06 wt % phenol in water, 4.1 stages of extraction efficiency were achieved at a residence time of 9.8 min. A challenging case study (50 wt % acetone–water–toluene) was subsequently conducted to prove the high applicability for emulsion systems of this special microextractor. Lastly, a mathematical model was established and the predicted results of three flow rate ratios are in good agreement with experimental results.
研究领域:
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）