SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xianglong Lei,Jun Tan,Pengfei Zhu,Chaozhen Zheng,Yao Liu,Le Zhang,Jun Luo,Jiugang Hu
Short-process hydrometallurgy is promising for non-traditional resource utilization due to low cost and less consumption, but it presents a great challenge to metal separation of complex leaching solutions. Herein, a bidentate pyridine-pyrazole ligand (BPP) was synthesized to realize the direct extraction of nickel from sulfuric acid leachate of laterite ore. The separation behaviors of nickel over other impurities (Co, Mn, Mg, Al, Ca, Fe, and Zn) were evaluated for the mixtures of BPP and dinonyl naphthalenesulfonic acid (DNNS). This binary system exhibits the synergistic effect on nickel and antagonistic effect on impurities, which improves the selective separation of nickel. The molar ratio of BPP/DNNS, solution pH, extractant concentration, and nickel concentration on metal extraction were investigated. The extraction efficiency of nickel reaches 95.9 % at pH = 2.5, and the separation coefficients of nickel over aluminum, manganese, and iron is 86.2, 95.4, and 69.4 at the optimal DNNS/BPP molar ratio of 1:1, respectively. Furthermore, the component interaction and coordination structure were disclosed through NMR, ATR-IR, XAS, and UV–vis spectroscopies. The mechanism analysis indicated that the exclusion of coordinated water molecules with BPP contributes to the synergistic extraction of nickel, and the intermolecular interaction between DNNS and BPP inhibits the extraction of impurities. Therefore, the pyridine-pyrazole ligand-induced synergistic and antagonistic effects will be helpful to the short process utilization of complex nickel-bearing resources.
研究领域:
冶金化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
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2018
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IF 4.908
Honghua Zhang,Hongguo Tang,Jiakuo Xu,Yajing Li,Zhiqiang Yang,Ruixia Liu,Suojiang Zhang,Yanji Wang
The aromatic-compound additive in sulfuric acid (H 2 SO 4 ) was found to promote isobutane/butene alkylation significantly. The selectivity of isooctane (C 8 ) and the alkylate research octane number increased by 23.46% and 5.09, respectively, when thiophene was added to H 2 SO 4 , especially. The proportion of trimethylpentanes can be improved from 58.57% to 84.58%, and the ratio of trimethylpentanes to dimethylhexanes was doubled, compared with that in the presence of H 2 SO 4 alone. The improved performance in the presence of thiophene additive in H 2 SO 4 is attributed to the improvement in carbenium-ion stability and the acceleration of hydrogen proton release, because of the existence of electron-rich π-bond compounds, and the substitution of thiophene in the alpha site by the sulfonic group and isobutane/butene. Reaction parameters such as reaction temperature, reaction time, stirring speed, feed rate, and acid/hydrocarbon volumetric ratio were also investigated in detail. The synergetic mechanism of thiophene-H 2 SO 4 on isobutane/butene alkylation was also speculated.
研究领域:
化学工程
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催化反应
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Guangyao Yan,Jianhua Xiao,Gang Tang,Yulu Liu,Xiaohong Zhang,Gaohua Hu,Yuqi Huang,Weiyao Yan,Qing Guo,Jiawei Shi,Ruyue Han,Yongqian Liang,Xiaohan Meng,Yongsong Cao
Prothioconazole (Prot) has been widely used for over two decades in controlling cereal diseases. However, the continuous emergence of resistance in plant pathogens has necessitated the development of novel fungicides. Thiosulfonate compounds have great application prospects due to their unique structural features and multisite activity. Herein, 25 novel Prot-based thiosulfonates were synthesized, and related antifungal activities were evaluated. Among them, 17 arylthiosulfonates exhibited better antifungal efficacy against Fusarium graminearum (EC50 = 0.07–0.22 mg/L) than Prot (EC50 = 0.41 mg/L). Interestingly, the most efficient compound, Tosyl-Prot (I-08) could be hydrolyzed to Prot in the environment and exhibited superior safety toward germination of wheat seed (86.67%) compared to Prot (0%). The antifungal mechanism of compound I-08 was demonstrated by disrupting the membrane integrity, inhibiting biomass accumulation, and suppressing multiple metabolic pathways. Therefore, Prot-based thiosulfonates would offer innovative strategies for the development of next-generation agricultural fungicides with multimodal actions and enhanced environmental compatibility.
研究领域:
农业化学
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杀菌剂开发
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植物病理学
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环境毒理学
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有机合成
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Xiao Jia,Hongli Cui,Song Qin,Jingnan Ren,Zhifeng Zhang,Qi An,Nawei Zhang,Jinchu Yang,Yongfeng Yang,Gang Fan,Siyi Pan
Processing is an indispensable technology in the preparation of Spirulina platensis ( S. platensis ). The key odorants in liquids, muds, and powders from S. platensis (NM and GZ) were characterized. A total of 90 odorants were identified and 41 odorants were sniffed with the flavor dilution (FD) factors ranging from 1 to 729. Among them, nonanal, decanal, d -limonene, β -cyclocitral, and β -ionone with FD factors ≥1 were detected in S. platensis during the whole processing stages. In addition, heptanal, ( E , E )-2,4-nonadienal, trans -4,5-epoxy-( E )-2-decenal, 1-hepten-3-one, isophorone, 3-ethyl-2,5-dimethylpyrazine, and α -ionone exhibited higher odor activity values in powders; β -myrcene, methional, and S -methyl methanethiosulphonate were key odorants in muds; while trans -3-penten-2-ol was key odorant in liquids. Besides, the GZ-mud presented stronger earthy and fishy odor than NM - mud. S. platensis powders have the stronger grassy odor, roasted odor, and marine odor than S. platensis muds. Overall, drying process promotes the formation of aldehydes, heterocyclic compounds, and terpenoids.
研究领域:
食品科学
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分析化学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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