Article
Green & Sustainable Science & Technology
Lin Li, Krystal Davis, Aaron King, Mauro Dal-Cin, Andrzej Nicalek, Ben Yu
Summary: This study tested an effective and efficient extraction and separation method for Nd/La using a flat-sheet supported liquid membrane. The results showed that the extraction of La and Nd increased with an increase in the initial pH of the feed solution and P507 concentration. The maximum separation factor of 44.25 was achieved at a low P507 concentration of 5% (v/v).
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Xiaobo Zhu, Yue Liu, Chen Ma, Wang Li
Summary: A selective and highly effective method for the extraction and separation of V(IV) and Fe(III) using N235 and P507 as solvent extractants is proposed. The pH, composition, and concentration of the extractant mixture have significant effects on the extraction efficiency and separation factor. The mixing of P507 and N235 generates the P507 monomer, which enhances the extraction efficiency and weakens the stability of vanadium containing extraction complex. Cation exchange process forms the extraction complexes.
Article
Materials Science, Multidisciplinary
Miaomiao Peng, Yangjing Tan, Keyu Shen, Zhiyi Hu, Chun Liu, Fei Li, Zhixiong Liu, Wenbin Yan, Jun Hua
Summary: This study investigated the thermodynamics of separating molybdenum(VI) over iron(III) using mixtures of P507 and N235 to enhance separation efficiency. Various parameters affecting the extraction of metal ions were examined. The results showed that the P507+N235 system exhibited excellent separation efficiency.
Article
Engineering, Chemical
Hui Su, Boren Tan, Jian Zhang, Wensen Liu, Lina Wang, Yong Wang, Zhaowu Zhu, Tao Qi
Summary: A ternary synergistic solvent extraction system was developed to achieve high Li+ selectivity and efficient Li+ stripping simply with water. A thermodynamic empirical model was used to elucidate the extraction mechanism and optimize the Li extraction process from Mg-rich salt-lake brines.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Ye Zhang, Yong Gao, Peng Wang, Duo Na, Zhenming Yang, Jinsong Zhang
Summary: SiC foam is a promising material for extraction reactors in the field of rare earths extraction and separation. This study designed a static mixer reactor based on SiC foam and investigated the structure-performance relationship using experimental and computational fluid dynamics (CFD) simulation. The results demonstrate that SiC foam exhibits superior extraction and mass transfer performance, making it a suitable candidate for efficient and high-throughput extraction and separation of rare earths.
JOURNAL OF RARE EARTHS
(2022)
Article
Energy & Fuels
Hosnie-Sadat Mousavi, Masoud Rahimi, Majid Mohadesi
Summary: This study investigated the purification of glycerol obtained from the biodiesel production process using various solvents. The results showed that petroleum ether was more effective in removing methanol from glycerol and purifying it compared to the other solvents.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Chemical
Jun Liu, Baihua Chen, Yunnu Liu, Jun Ma, Xingliang Li, Yanqiu Yang
Summary: The article presents a novel tridentate ligand ETPhenAm with selective extraction properties for americium and curium, demonstrating promising experimental results and potential applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Azadeh Yarahmadi, Mohammad Hassan Khani, Masoud Nasiri Zarandi, Younes Amini, Ali Yadollahi
Summary: This study investigated the removal efficiency of Cerium (Ce(III)) and lanthanum (La(III)) ions from aqueous solution using Amberlite XAD-7 resin impregnated with DEHPA (XAD7-DEHPA). The optimal operating conditions were determined through response surface methodology based on the central composite design. The results showed that XAD7-DEHPA resin was effective in selectively removing Ce(III) and La(III) ions, with an adsorption percentage of 99.99% and 78.76% respectively. Langmuir isotherm model was found to best describe the equilibrium data, and the maximum adsorption capacity of the adsorbent was 8.28 mg/g for Ce(III) and 5.52 mg/g for La(III).
SCIENTIFIC REPORTS
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhenzhong Bian, Jie Lu, Ruiyang Zhang, Xiaofeng Zhong, Zhangxuan Ning, Airan Zhang, Yuanping Zhang
Summary: This study focused on the separation and recovery of vanadium(IV), iron, and titanium from vanadium-bearing titanomagnetite leach solutions using P204 and P507 extractants. The optimal extraction conditions were determined based on speciation analysis, resulting in high extraction efficiencies for vanadium (94.21%), iron (3.45%), and titanium (5.32%). Further countercurrent extraction and stripping experiments were conducted, achieving desirable extraction efficiencies for vanadium (98.13%) and a high stripping efficiency for a vanadium-rich solution using sulfuric acid. The mechanism of synergistic extraction between P-O-H hydrogen ions and VO2+ was confirmed using ATR-FTIR spectroscopy and molecular structure derivation. Additionally, impurity ions (Fe2+) were successfully separated and converted into qualified iron oxide pigment.
MINING METALLURGY & EXPLORATION
(2023)
Article
Engineering, Environmental
Mehdi Sattari-Najafabadi, Mohsen Nasr Esfahany
Summary: By studying the novel slug flow microreactor and the effect of nanoparticles on chromium removal, significant improvements in extraction rate and efficiency can be achieved.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Long Li, Xiaoyang Hu, Zhuang Wang, Qiao Yu, Fengfeng Li, Fangxiang Luo, Qingjiang Pan, Songdong Ding
Summary: This study investigates the influence of ligand structure on the extraction of Am3+ over Eu3+ in the efficient separation of trivalent actinides over lanthanides. Among the three ligands tested, N,N-diethyl-N',N',N'',N''-tetraoctylnitrilotriacetamide shows the highest extraction ability for Am3+. The study reveals that unsymmetrical NTAamides have higher extraction efficiency to Am3+ and relatively lower selectivity for Am3+ over Eu3+ than the symmetrical NTAamide due to steric hindrance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Metallurgy & Metallurgical Engineering
Shahab Alizadeh, Mahmoud Abdollahy, Ahmad Khodadadi Darban, Mehdi Mohseni
Summary: This study investigated the selective separation of lanthanum and yttrium in a nitrate medium using D2EHPA, and found that the extraction of both elements was exothermic with a reduction in entropy. The thermodynamic data suggested stronger complexation of D2EHPA with Y(III) compared to La(III). With a proposed flowsheet, lanthanum and yttrium products with > 90% purity were successfully obtained.
MINING METALLURGY & EXPLORATION
(2021)
Article
Engineering, Environmental
Yimin Cai, Seraj A. Ansari, Kuirong Fu, Beichen Zhu, Haoyang Ma, Lixi Chen, Steven D. Conradson, Song Qin, Haiying Fu, Prasanta K. Mohapatra, Lihua Yuan, Wen Feng
Summary: The study introduces five novel pillar[5]arene-based extractants that efficiently separate actinides(III) from lanthanides(III). These ligands exhibit high extraction selectivity for Am(III) over Eu(III) at around pH 3.0, with no significant decrease in performance after exposure to gamma radiation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Kuifang Zhang, Helei Liang, Xiaocong Zhong, Hongyang Cao, Ruixiang Wang, Zhiqiang Liu
Summary: In this study, a novel approach for the selective separation and comprehensive recovery of transition metals and lithium from spent ternary lithium-ion batteries was proposed. The separation process involved stepwise phosphate precipitation and solvent extraction, successfully separating and recovering the metals. This method enables the direct preparation of ternary material precursors, facilitating the effective utilization of waste battery materials.
Article
Metallurgy & Metallurgical Engineering
Yimeng Xu, Bicheng Deng, Shengting Kuang, Wuping Liao
Summary: A new aminophosphonate extractant, di(2-ethylhexyl) (N, N'-di(2-ethylhexyl) amino methyl) phosphonate (L), was synthesized and used for the extraction and separation of gallium and indium from chloride solution. The maximum separation factors SFGa/In reached 995, higher than those of its analogues Cextrant 230 (SFGa/In = 471) and BEADP (SFGa/In = 201) under optimal acidity conditions. The extracted complexes were identified as HGaCl4L2 and InCl3L2. The extraction reactions of gallium and indium were both endothermic. The loading capacities of 30 vol% L for Ga and In were 32.9 g/L and 25.2 g/L, respectively. Gallium and indium loaded in the organic phase can be effectively stripped by distilled water, H2SO4, and HNO3. A process was developed for the separation and purification of gallium, with Ga2O3 purity increasing from 98.4% to 99.97% and a yield of 92.5%.
Article
Energy & Fuels
Laura L. Trinkies, Marlene Crone, Michael Tuerk, Manfred Kraut, Roland Dittmeyer
Summary: In this study, mono- and bimetallic Pd and Pt catalysts were deposited via supercritical fluid reactive deposition (SFRD) on TiO2 coated additively manufactured substrates. The focus of this work was to evaluate the suitability of these catalysts for the direct synthesis of H2O2 in the liquid phase. The results showed that all catalysts exhibited high activity and productivity, with PdPt bimetallic catalysts showing the highest productivity and an increase in Pd loading leading to a decrease in productivity. Comparison with literature data demonstrated the high suitability of the SFRD method for the proposed application, with the added benefits of simplicity and environmental friendliness in catalyst production.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2024)
Article
Energy & Fuels
Xiongbao Hu, Zuguo Shen, Yu Wang
Summary: It is impossible to control the outer wall temperature of the micro-combustor below the maximum allowable temperature of commercial thermoelectric generators simply through increasing the equivalent heat transfer coefficient. Three simple strategies were developed to improve temperature uniformity, yet none of them could ensure full temperature control.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2024)