CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2014
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IF 0.872
Zhijian HE,Xiaomin WANG,Tian YAO,Hang SONG,Shun YAO
Four novel benzothiazolium ionic liquids with PF − 6 ([C 1 Bth][PF 6 ], [C 4 Bth][PF 6 ], [C 5 Bth][PF 6 ] and [C 6 Bth][PF 6 ]) were synthesized, and the rang of their melting points were determined between 358.35 K–424.05 K. The relationship of their melting points and the length of the straight alkyl chain on cation reflected ‘S’ type tendency. Then, the solubilities of the four ionic liquids in six lower alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and 2-methyl-1-propanol) were measured in the temperature rang of 253.15–383.15 K at atmospheric pressure with static analytical method, respectively. It was found that [C 6 Bth][PF 6 ] in all investigated ionic liquids had the largest solubility in six alcohols and the solubility of [C 4 Bth][PF 6 ] in methanol was very sensitive for temperature in 313.15–333.15 K, which was so-called “temperature-sensitivity”. This feature is of great significance to their application of catalyzing reaction or extraction process, and makes the recovery and reuse of ionic liquids (ILs) become easier. Moreover, the experimental solubility data were correlated with the modified Apelblat equation and λ h equation, respectively. It was found that the result of correlation using two divided temperature ranges was better than that of using the whole temperature range.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
THERMOCHIMICA ACTA
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2012
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IF 1.805
Yonghong Hu,Lulu Wang,Zhongbin Meng,Wenge Yang
In this paper, the solubilities of maleic acid in different compositions of acetone–ethyl acetate mixtures were measured at the temperature range from 285.15 K to 324.25 K under atmospheric pressure by the gravimetric method. These data were correlated with Apelblat equation and Buchowski–Ksiazczak λh equation. Both equations provided an accurate mathematical representation of the experimental results. The root-mean-square deviations (rmsds) of the Apelblat equation were lower than those of λh equation, which indicated that the Apelblat equation could regress the solubility data much better than the λh equation for this system. This study provided valuable data not only for optimizing the process of purification of maleic acid in industry but also for further theoretical studies.
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
JOURNAL OF CHEMICAL THERMODYNAMICS
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2025
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IF 2.2
Zhengda Zhou,Yuchen Yue,Siyu Wang,Tianxia Guo,Zihang Xu,Chunsong Liu,Yun Gao,Yanan Zhou
In this study, the static method was employed to investigate the solubility of potassium benzoate in ten pure solvents, including methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, n-pentanol, formamide, N , N -dimethylformamide, and N , N -dimethylacetamide, within the temperature range from 282.95 to 317.95 K at atmospheric pressure. The influence of temperature and solvent type on the solubility of potassium benzoate was analyzed. The experimental results revealed that the solubility of potassium benzoate increased with the rising of temperature in all the solvents studied. In addition, the experimental solubility data of potassium benzoate was fitted using the modified Apelblat equation and the λh equation. The calculated data showed that the modified Apelblat equation gave the better results compared to the λh equation. Furthermore, the Hansen solubility parameters and dipole moments were used to elucidate the solubilization behavior of potassium benzoate in various solvents. Finally, the dissolution thermodynamic properties of potassium benzoate including the Gibbs free energy, enthalpy and entropy were calculated based on the experimental solubility data and the van't Hoff equation.
研究领域:
物理化学
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化学热力学
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溶液化学
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药物化学
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
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IF 2.196
Pengshuai Zhang,Chi Zhang,Rui Zhao,Yameng Wan,Zhongkai Yang,Ruyi He,Qiliang Chen,Tao Li,Baozeng Ren
The solubility of florfenicol form A in eight pure organic solvents (propionic acid, ethanol, 1-propanol, 1-butanol, 2-propanol, 2-methyl-1-propanol, 3-methyl-1-butanol, and 2-ethyl-1-hexanol) and three binary solvents (dimethyl sulfoxide + ethanol, dimethyl sulfoxide + 1-propanol, and dimethyl sulfoxide + 1-butanol) was measured by a laser dynamic method at temperature from 283.15 to 323.15 K. The experimental results show that the mole fraction solubility of florfenicol in the pure solvents decreased according to the following order: ethanol > 1-propanol > 2-propanol > 1-butanol > 3-methyl-1-butanol > 2-methyl-1-propanol ≈ propionic acid > 2-ethyl-1-hexanol. The experimental results show that the mole fraction solubility of florfenicol form A in the binary solvents increased with the increase of temperature and dimethyl sulfoxide mass fraction. The experimental solubility data were well correlated with the four thermodynamic models: modified Apelblat equation, λh equation, NRTL model equation, and Wilson model equation. The modified Apelblat model equation was regarded as the best one to fit the experimental values in the pure solvents.
研究领域:
药学
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物理化学
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热力学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Changyou Yu,Mingyang Chen,Bo Lin,Ningning Tian,Ye Gao,Songgu Wu
The solubility of 5,5-dimethylhydantoin (DMH) in 12 pure solvents including water, methanol, ethanol, 1-propanol, isopropyl alcohol, 1-butanol, isobutyl alcohol, 2-butanol, 1-pentanol, ethyl acetate, propyl acetate, and acetonitrile was measured at temperatures from 283.15 to 323.15 K under atmospheric pressure by a gravimetric method. The values of the mole fraction solubility of DMH in these solvents increase with increasing temperature and present the following order at a fixed temperature: methanol > ethanol > 2-butanol > isopropyl alcohol > 1-propanol > isobutyl alcohol (1-butanol) > 1-pentanol > water > acetonitrile > ethyl acetate > propyl acetate. They were mathematically correlated by the modified Apelblat equation, van’t Hoff equation, λh equation, and the Wilson model. The results showed a satisfactory correlation for each model.
研究领域:
化学
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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 THERMODYNAMICS
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2020
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IF 2.888
Da Li,Ruyi He,Kunpeng Yang,Jiao Sha,Yameng Wan,Yu Li,Xinding Yao,Tao Li,Baozeng Ren
The solubility of thiamethoxam in nine single solvents (acetic acid, methanol, acetonitrile, 2-methoxyethanol, 2-ethoxyethanol, propionic acid, DMSO, 1,4-dioxane, DMA) and binary mixed solvents (methanol + acetonitrile) was measured by dynamic laser method from 278.15 K to 323.15 K under pressure of 101.2 kPa. Modified Apelblat equation, λh equation, NRTL model, and Wilson model were used to fit the experimental data of pure solvents; for mixed solvents, Modified Apelblat equation, λh equation, Jouyban-acree model and Wilson model were used for solubility data correlation. The results showed that the fitting value is in good agreement with the experimental value, the solubility of thiamethoxam in selected solvents increased with the increase of temperature. It was found that the solubility of thiamethoxam in mixtures with different proportions of methanol and acetonitrile was higher than that of two single solvent, which might be related to the bipolarity/polarizability of the solvent. What’s more, the mixing enthalpy, entropy, and Gibbs free energy in pure and mixed solvents were obtained according to the Wilson model, the value of Δ mix G is negative in the dissolution, the value of Δ mix S is positive, indicating that the mixing process in selected solvents was entropy-driven. When thiamethoxam dissolved in methanol, acetic acid, propionic acid, the value of Δ mix H is positive, which showed that thiamethoxam was endothermic during dissolution, When thiamethoxam dissolved in acetonitrile, 2-methoxyethanol, 2-ethoxyethanol, DMSO, 1, 4-dioxane, DMA and mixed solvents the value of Δ mix H is negative, which showed that thiamethoxam was exothermic during dissolution. The solubility data, solubility model and thermodynamic parameters of thiamethoxam are of great significance to the application of thiamethoxam industrial production and crystallization.
研究领域:
物理化学
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药学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
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IF 2
Zheng-En Piao,Jingzhou Guo,Dan Wang,Wei Mao,Yuan Pu,Jian-Feng Chen
2-(4-tert-Butylphenyl)-5-(4-biphenyl)-1,3,4-oxadiazole (PBD) is one of the most widely used electron transport layer materials in optoelectronic devices, and studies on the solubility of PBD in various solvents are critical for development of solution-processable roll-to-roll electronic devices. In this study, the isothermal saturation method is used to determine the solubility data of PBD in 12 commonly used organic solvents. The experimental solubility of PBD increases gradually with enhanced temperature for the examined temperature range of 283.15–323.15 K in n-hexane, methanol, ethanol, isopropanol, tetrahydrofuran (THF), acetonitrile, ethyl acetate, N-methylpyrrolidone (NMP), toluene, and chlorobenzene, while the temperature ranges were 293.15–333.15 K and 273.15–303.15 K for dimethyl sulfoxide and dichloromethane, respectively. The obtained solubility values of PBD are correlated by three models including the modified Apelblat equation, λh equation, and Yaws equation. Comparison of the calculated Akaike information criterion values resulted in selecting the optimal model for each solvent. Of the five solvents calculated, n-hexane, methanol, toluene, THF, and NMP, the λh equation provides an optimal fit. Both the modified Apelblat equation and the Yaws equation work well in chlorobenzene. Among the other six solvents, the fit of the Yaws equation is the best. These results of solubility provide the basic data for the synthesis of PBD nanoparticles via high-gravity-assisted antisolvent precipitation processing.
研究领域:
材料科学
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化学工程
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物理化学
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光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Xiaofang Niu,Han Liu,Su Xue,Jinli Zhang,Wei Li
The solubility data of flonicamid (FA) in twelve mono-solvents (methanol (MA), ethanol (EA), n-propanol (NPA), isopropanol (IPA), n-butanol (NBA), isobutanol (IBA), ethyl acetate (EAC), butyl acetate (BAC), acetone (AT), acetonitrile (AN), tetrahydrofuran (THF), 1,4-dioxane (DX)) and a binary solvent of EA + EAC were experimentally measured by using a gravimetric method under atmospheric pressure. The tested temperature range for the studied solvents was from 283.15 K to 323.15 K except of 288.15–323.15 K for DX. Powder X-ray diffraction (PXRD) was applied to evaluate the crystal form of FA, and no solvate or new form formation were observed during the whole experiment. The experimental results show that the rising temperature leads to the increase of the FA solubility in all the studied mono and mixed solvents at the tested ranges. For mono-solvents, the solubility of FA at 293.15 K increases in the order: IBA (0.002641) < IPA (0.004243) < NPA (0.004361) < NBA (0.004750) < BAC (0.006844) < EA (0.006864) < EAC (0.01342) < MA (0.01394) < DX (0.01747) < AN (0.02455) < THF (0.03433) < AT (0.04645). For EA + EAC mixed solvents, the solubility of FA increases and then decreases with the rising mole fraction of EAC. That means addition of EAC to EA can alter the FA solubility. Density functional theory (DFT) calculations were performed to analyze the interactive energy between FA and the solvent molecules. Furthermore, the Apelblat equation, van’t Hoff equation, λh equation are applied to correlate the experimental solubility data of FA in mono and mixed solvent systems, while NRTL model and Wilson model are selected for mono-solvents, CNIBS/R-K model and Jouyban-Acree model for mixed solvents. Correlated results demonstrate that the Apelblat model provides the best regression. In addition, the dissolution thermodynamic properties of FA in chosen solvents are analyzed by the van’t Hoff equation. It suggests that the dissolution processes of FA are non-spontaneous, endothermic and entropy increase in these studied systems.
研究领域:
化学
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物理化学
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热力学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2020
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IF 2.888
Renren Sun,Haixia He,Yameng Wan,Yueru Wang,Liyuan Li,Jiao Sha,Gaoliang Jiang,Yu Li,Tao Li,Baozeng Ren
For further study on solubility behaviors of melatonin (MT), the solubility of MT in the three mono-solvents {N, N-dimethylformamide (DMF), 2-methoxyethanol, 2-ethoxyethanol} and four binary solvents {(DMF, 2-methoxyethanol, 2-ethoxyethanol and methanol) + ethyl acetate} was measured in a range of 278.15 K–323.15 K by laser monitoring method. The measurement results showed that MT solubility in all tested solvents increased with rising temperature. In binary solvents except methanol + ethyl acetate, the solubility values of MT had a positive relationship with the mass fraction of co-solvents. In methanol + ethyl acetate, the solubility of MT initially increased, followed by a decrease (with the rising mass fraction of methanol) and arrived the highest solubility value at a mass fraction of methanol being 0.4000. The Hansen solubility parameters (HSPs) were applied to study the solubility behaviors of MT in tested solvents. Moreover, in three pure solvents, the measured solubility data of MT was correlated by (NRTL-SAC, NRTL, two-Suffix Margules, UNIQUAC models and modified Apelblat equation). In binary solvents, the solubility data was fitted by (three-Suffix Margules, λh equation, Yaws model equation and modified Apelblat equation). Furthermore, the apparent thermodynamic properties were calculated based on the van’t Hoff equation. The positive values of apparent standard dissolution enthalpy and entropy suggest that the dissolution process of MT in all of chosen solvents is entropy-driven and endothermic. The larger values of ζ H than ζ TS represent that the main contributor of Δ dis G o in all investigated solvents is enthalpy.
研究领域:
化学工程
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物理化学
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药学
✓ 已验证
产品关联
DOI
高影响因子
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