CATALYSIS LETTERS
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2022
·Vol. 153
·期 4
·1215-1226
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IF 2.936
Wang Shiqing,Li Yafei,Lan Xiaocheng,Liu Boyang,Wang Tiefeng
Ni phosphide and Lewis acid–base pair site of Al 2 O 3 were combined as highly efficient catalyst for direct amination of 1-octanol to 1-octylamine. Due to the higher dehydrogenation activity and the site isolation effect, Ni 3 P/Al 2 O 3 -TPP prepared by organophosphorus was 4.0 times more active than Ni/Al 2 O 3 and increased the selectivity to 1-octylamine from 71.4 to 92.8% at 0.4 MPa NH 3 . Graphical Abstract
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2022
·Vol. 101
·期 7
·4217-4229
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IF 2.5
Jia Wang,Rongchun Shen,Yueqiang Cao,Wei Li,Jinghong Zhou
1,2-butanediol (1,2-BDO) and 1,2-propanediol (1,2-PDO) are inevitably side produced in the ethylene glycol (EG) production processes from non-petroleum routes, but are very difficult to separate by the ordinary distillation method because of the closeness of their boiling temperatures to EG, thus compromise the economy of these processes. The azeotropic distillation process using 1-octanol (CPO) as an entrainer to separate EG and 1,2-BDO mixture with or without 1,2-PDO was studied in this paper. Four binary vapour–liquid equilibrium data of EG-1,2-BDO, EG-CPO, 1,2-BDO-CPO, and 1,2-PDO-CPO were measured using an Ellis equilibrium kettle and regressed with the thermodynamic model of non-random two liquid to obtain the corresponding binary interaction parameters. On this basis, azeotropic distillations with CPO as an entrainer were designed to separate EG and 1,2-BDO with or without 1,2-PDO. The complete separation processes, including the azeotropic distillation and CPO recovery process consisting of extraction with H 2 O and subsequent distillation, were simulated and optimized with Aspen Plus for both the EG-1,2-BDO binary mixture and the EG-1,2-BDO-1,2-PDO ternary mixture. The simulation results show that the azeotropic distillation method with CPO as an entrainer can effectively separate the mixture of EG-1,2-BDO and EG-1,2-BDO-1,2-PDO, achieving EG of 99.90% purity with 99.98% recovery and 1,2-BDO of 99.30% purity with 99.45% recovery for the binary mixture, and achieving EG of 99.90% purity with 99.80% recovery, 1,2-BDO of 99.35% purity with 99.35% recovery, and 1,2-PDO of 90.59% purity with 94.38% recovery for the ternary mixture. These processes are promising for industrial application and can significantly improve the economy of non-petroleum EG production.
研究领域:
化学工程
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分离技术
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DOI
高影响因子
Biomass Conversion and Biorefinery
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2022
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IF 4.05
Li Keying,Zhu Hengji,Zhao Yu,Yan Jingwei,Zhang Jiajian,Lin Xiuhua,Fan Liwei,Lu Zexiang
The solvent has an important impact on liquefaction conversion from biomass to efficiently obtain fuels and chemicals. In this paper, the catalytic liquefaction of woody biomass was studied using fir sawdust as raw material and concentrated sulfuric acid as catalyst in GVL/1-octanol mixed solvent with mechanical stirring and oil bath heating. The influence of GVL on liquefaction yield was discussed, and the liquefaction productions were characterized by some analysis methods to analyze the liquefaction mechanism. The results show that adding GVL benefits to improving liquefaction yield and generating high value-added monophenol because of the enhancement of the surface wettability of biomass and the inhibition of polymerization of mononuclear aromatics with other degradation products. The maximum liquefaction yield of 76.07% was obtained under the suitable conditions of fir sawdust 10 g, temperature 150 ℃, reaction time 60 min, mass ratio of sawdust/solvent 1:6, catalyst concentration 0.6 mol·L −1 , and mass ratio of GVL/1-octanol 4:6. The mechanism study reveals that aromatics originated by lignin degradation as well as small molecule ketones from cellulose and hemicellulose degradation. GVL/1-octanol as an eco-friendly solvent system exhibits a promising prospect of application in woody biomass conversion. Graphical abstract
研究领域:
生物化学
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可再生能源
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绿色化学
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DOI
高影响因子
ChemCatChem
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2022
·Vol. 14
·期 7
·e202101728
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IF 5.497
Shiqing Wang,Xiaocheng Lan,Boyang Liu,Babar Ali,Tiefeng Wang
Graphical Octylamine synthesis : Ni x Fe 1 /Al 2 O 3 was used as catalyst for 1-octanol amination and provided the highest yield among the reported nonprecious metal catalysts. The generation of Ni−FeO x interactions provided sufficient Fe 2+ /Fe 3+ −O 2− sites for the activation of 1-octanol. Meanwhile, the cooperation between Ni site and Lewis acid-base pairs significantly enhanced the amination of 1-octanol to 1-octylamine. The synthesis of 1-octylamine, a primary platform molecule, remained a great challenge in catalysis. In this work, Ni x Fe 1 /Al 2 O 3 was used for direct amination of 1-octanol to 1-octylamine. Catalyst evaluation indicated that the promotion effect of Fe/Ni ratio on the catalytic amination activity followed a volcano curve while the selectivity to 1-octylamine was positively correlated with the Fe loading. Compared with the Ni/Al 2 O 3 catalyst, the amination activity was increased by 2.8 times by optimizing the Fe/Ni ratio to 0.33, and the selectivity to 1-octylamine was increased from 84.0 % to 96.3 % when increasing the Fe/Ni ratio from 0 to 1. Based on catalyst characterizations, the good performance of Ni x Fe 1 /Al 2 O 3 was ascribed to the combined modification effect of the NiFe alloy and Ni−FeO x interface. The FeO x species enriched on the Ni particle surface provided sufficient Fe 2+ /Fe 3+ −O 2− sites for the activation of 1-octanol, and the cooperation between Ni sites and Lewis acid-base pairs enhanced the amination of 1-octanol to 1-octylamine. This work sheds new light on the design of Ni-based catalysts without using a noble metal for primary amine preparation.
研究领域:
催化
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化学工程
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材料科学
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产品关联
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
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2025
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IF 3.3
Hanqin Weng,Baoying Zhang,Yizhi Chen,Shinichi Yamashita,Yusa Muroya,Hao Yu,Xinrui Zhang,Xiaofan Yang,Weiqun Shi
The ligand of 2,9-Diamide-1,10-phenanthroline (DAPhen), developed for group actinide separation in the past decade, showed excellent extraction and separation performance for various actinides from trivalent lanthanides. However, its radiolysis mechanism remains unclear, restricting its application. Mechanism for the radiolysis of three different DAPhen in 1-octanol was studied by pulse radiolysis, of which the results demonstrated that reductive degradation was the main route of their radiolysis in 1-octanol. Solvated electrons (e sol − ), and α-hydroxyoctyl radicals have been recognized as the most important transient species responsible for DAPhen radiolysis. Rate constants for the reactions of e sol − with N,N′ -diethyl- N,N′ -ditethyl-2,9-diamide-1,10-phenanthroline (Et–Et-DAPhen, EED), N,N′ -dioctyl- N,N′ -ditoctlyl-2,9-diamide-1,10-phenanthroline (Oct-Oct-DAPhen, OOD), and N,N′ -diethyl- N,N′ -ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen, ETD) were estimated to be 1.9 × 10 9 , 2.3 × 10 9 , and 1.5 × 10 9 L mol −1 s −1 , respectively. Those of α-hydroxyoctyl radicals with EED, OOD, and ETD were approximately 1.1 × 10 8 , 2.1 × 10 8 , and 2.7 × 10 8 L mol −1 s −1 , respectively. The studied DAPhen exhibited high reactivity with e sol − , and α-hydroxyoctyl radicals in 1-octanol, resulting in their vulnerability under irradiation. A versatile strategy was accordingly proposed to enhance their radiation stability based on the insights into transient processes of DAPhen radiolysis. If the HNO 3 -equilibrated organic phase was saturated with nitrous oxide (N 2 O), the reductive species responsible for DAPhen degradation would be scavenged. As a consequence, the radiation-resistance of DAPhen was significantly improved because the key elementary reaction of radiolysis was inhibited by the synergetic effect of N 2 O and HNO 3 .
研究领域:
放射化学
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配体设计
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核化学与技术
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
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2015
·Vol. 17
·期 8
·4411-4417
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IF 8.02
Qineng Xia,Yinjiang Xia,Jinxu Xi,Xiaohui Liu,Yanqin Wang
An energy-efficient catalytic system for the one-pot production of 1-octanol from biomass-derived furfural-acetone (FFA) under mild conditions in water was developed, by sequential hydrogenation/hydrogenolysis over a hydrophilic Pd/NbOPO4 catalyst. A strategy of creating an intentional “phase problem” has been employed to prevent the over-hydrogenolysis of 1-octanol into n-octane and therefore increased the selectivity to 1-octanol. The effects of reaction conditions as well as a variety of noble-metal loaded bifunctional catalysts have been systematically investigated to maximize the yield of 1-octanol. Moreover, the addition of liquid acids to the catalytic system further enhanced the selectivity towards the formation of 1-octanol. There is a strong correlation between the acid strength of an acidic additive and the sum yield of 1-octanol and octane. With the addition of TfOH, the highest yield of 1-octanol (62.7%) was obtained from one-pot conversion of biomass-derived FFA over Pd/NbOPO4.
研究领域:
化学工程
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可再生资源利用
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
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IF 2.196
Bing Jia,Liping Wang,Mengmeng Yan,Hai Liu,Yingmin Yu,Qingsong Li
Liquid–liquid equilibrium (LLE) data for ternary systems of water + 2,2,3,3-tetrafluoro-1-propanol + anisole/1-octanol were determined at temperatures of 298.2, 308.2, and 318.2 K under 101.3 kPa. The distribution coefficients and separation factors were calculated from experimental LLE data, which indicated that anisole/1-octanol extracted 2,2,3,3-tetrafluoro-1-propanol from aqueous solution with high efficiency. The consistency of the experimental LLE data was assessed by the Othmer–Tobias and Hand equations. Meanwhile, the NRTL and UNIQUAC models were successfully applied to regress and correlate the experimental data, presenting the root-mean-square deviations (RMSD) less than 1.0%. The relevant binary interaction parameters of these two models were also regressed.
研究领域:
化学工程
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物理化学
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DOI
高影响因子
BIOCATALYSIS AND BIOTRANSFORMATION
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2022
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IF 2.325
Mingxin Zhu,Shuyi Guo,Rongchen Mang,Hua Zhou
Sebacic esters have excellent lubricity, thermal stability, and biodegradability and therefore are widely used as aerospace lubricants, metal working oil, or engine oil. They are mainly produced by chemical synthesis which, however, may cause environmental pollution, its enzymatic synthesis represents a more environmentally friendly alternative. A few reports have described the synthesis of sebacic esters employing immobilised lipases, but these biocatalytic reactions were exclusively carried out in solvent-free systems and thus, could have been limited by slow reaction rates and high reaction temperatures due to poor enzyme dispersion, low substrate solubility, and high viscosity of the reaction mixture. The current study investigated the biosynthesis of dioctyl sebacate in toluene by Novozym 435, a commercial immobilised lipase. The reaction parameters were investigated using the single factor approach and an orthogonal array design. The optimal conditions obtained were as follows: 10 mL toluene, sebacic acid,1 mmol (202.25 mg); molar ratio of sebacic acid to 1-octanol, 1:3; Novozym 435, 0.03 g; 4 Å molecular sieves, 1.5 g; reaction temperature, 40 °C; reaction time, 30 h. A dioctyl sebacate conversion rate of 93% was achieved under these optimal conditions. In particular, the addition of molecular sieves to the reaction mixture markedly improved the product yield. The reaction temperature was low enough to make the operation easy and energy-efficient and therefore, well suited for large-scale production.
研究领域:
化学工程
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生物化学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
·
IF 2.694
Yuanyuan Han,Houchun Yan,Mai Han,Wei Wang,Jia Han,Tao Xing,Bing Li,Qingsong Li
The basic liquid–liquid equilibrium data of two systems {water + 2-propanol (IPA) + 1-octanol/n-propyl acetate} were measured. The distribution coefficients of the 2-propanol and the separation factors of the systems were calculated to analyze the extraction ability of the two extractants that extract IPA from water. The correlation model Hand equation was used to fit the data. The value of the linear correlation coefficient R2 > 0.99 indicates that the linear fit of the experimental data is good. The theoretical models NRTL and UNIQUAC were used to correlate the measured data. The deviation between experimental data and simulated data was calculated by the root mean square deviation (RMSD). The RMSD < 0.01 means that the two models were suitable for the regression of the systems studied in this work. GUI-MATLAB has validated the binary interaction parameters. The basic data obtained from this work can support the separation of water and IPA.
研究领域:
化学工程
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物理化学
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热力学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
·
IF 2.1
He Ma,Houchun Yan,Menghao Du,Yingmin Yu,Qingsong Li
To separate methyl 2-hydroxyisobutyrate from an aqueous solution, alkyl alcohols were selected as extractants. The liquid–liquid equilibrium data for the system {water + methyl 2-hydroxyisobutyrate + extractants (1-hexanol, 1-heptanol, 1-octanol, and 1-nonanol)} were determined at a temperature of 303.2 K. The partition coefficients and separation factors were calculated to assess the effectiveness of the extraction process. Additionally, the data were correlated using the NRTL and UNIQUAC models, with parameter regression conducted accordingly. The GMcal_TieLinesLL tool was utilized to evaluate the regression model parameters, and the results conformed to the Gibbs stability criterion. The present study further investigates the separation mechanism through analyses of σ-profile, deformation charge density, interaction energies, and Reduced Density Gradient (RDG) analysis. Ultimately, it was concluded that 1-nonanol exhibited the most effective extraction performance.
研究领域:
化学工程
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分离过程
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物理化学
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热力学
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萃取
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分子建模
✓ 已验证
产品关联
DOI
高影响因子
PROCESS BIOCHEMISTRY
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2016
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IF 2.529
Zhao-Yu Wang,Yan-Hong Bi,Rong-Ling Yang,Xiang-Jie Zhao,Ling Jiang,Cheng-Xin Ding,Shang-Yong Zheng
Efficient lipase-mediated research work was successfully exploited for synthesizing potential 6″- O -acyl-polydatin prodrugs in biomass-derived 2-methyltetrahydrofuran (2-MeTHF). The results of the enzyme recognitions of nine acyl donors evidently demonstrated that the position and number of the C C double bond in acyl chains profoundly influenced the behavior of the enzyme, which could be attributable to the resonance effect between the double bond and carbonyl group. Further investigations showed that introducing various acyl groups into the polydatin apparently enhanced its pH stability and 1-octanol-water partition coefficient (log P ). With regard to the human cervical cancer siHa cell apoptosis by a flow cytometry assay, the lipophilic 6″- O -sorboyl-polydatin exhibited improved apoptosis-inducing capability than the parent drug. The presence of the more lipophilic sorboyl chain in the acylated derivative could account for this.
研究领域:
药物化学
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癌症研究
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酶学
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有机合成
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2024
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IF 3.8
Dingli Ye,Junqiang Hao,Rongxu Zhang,Yangyang Zhou,Shurong Chen,Weijian Zhang,Lei Zhao,Jiahan Xie,Zhibing Wang
A simple, fast, and efficient ultrasonic-assisted supramolecular solvent microextraction combined with high performance liquid chromatography method was developed for the determination of coumarins in Cortex fraxini , including esculin, esculetin and fraxetin. In this study, a novel supramolecular solvent was prepared with 1-octanol, tetrahydrofuran and water for the first time, and its composition, viscosity, density, structure, and micromorphology were characterized. The prepared supramolecular solvent exhibited vesicular structures and had the characteristics of low viscosity. Through single-factor experiments, response surface methodology and artificial neural network-genetic algorithm, the optimal extraction conditions were obtained as follows: NaCl concentration of 1 mol mL −1 , pH value of 10, solid-liquid ratio of 10:1, vortex time of 30 s, ultrasonic power of 100 W, ultrasonic temperature of 60 °C, ultrasonic time of 15 min, centrifugation speed of 5000 rpm, and centrifugation time of 1 min. The results demonstrated that the artificial neural network model exhibited maximum R -values of 0.98703, 0.97440, 0.99836, and 0.95447 for training, testing, validation, and all dataset, respectively. The minimum mean square errors were 0.75, 10.15, 1.99, and 2.63, respectively. This indicated that the predicted values were almost consistent with the actual values. Under the optimal conditions, the total extraction yields of target analytes reached 2.80 %. The calibration curves for each analyte exhibited excellent linearity within the linear range ( r > 0.9993). The limits of detection and quantification ranged from 4.87 to 6.55 ng mL −1 and 16.24 to 21.84 ng mL −1 , respectively. The recoveries ranged from 98.71 % to 111.01 % with relative standard deviations of less than 3.6 %. The present method had the advantages of short extraction time (15 min) and less solvent consumption (0.5 mL). The prepared supramolecular solvent was proved to have great potential in extracting coumarins from medicinal plants.
研究领域:
分析化学
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药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）