JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Ruxue Yao,Yang Ge,Jiangtao Song,Fei Yuan,Yafei Guo,Tianlong Deng
The Qaidam Basin has potassium- and calcium-rich oil field brine resources at high temperatures. Since the phase diagram is a powerful tool to guide the separation and purification of inorganic chemical engineering for the development of potassium resources in oil field brine, the quaternary oil field brine system (Na+, K+, Ca2+//Cl– -H2O) and its two subsystems ((Na+, Ca2+//Cl– -H2O) and (K+, Ca2+, //Cl– -H2O)) at 338.15 K were reported for the first time by the isothermal dissolution equilibrium method. The compositions of the equilibrium solid phases were analyzed and identified by combined chemical analyzing and X-ray diffraction. The quaternary system has four crystallized regions corresponding to NaCl, KCl, KCl·CaCl2, and CaCl2·2H2O at 338.15 K, and the incongruent double salt KCl·CaCl2 occurred at 338.15 K. The study facilitates the enrichment of thermodynamic data and exploits brine-based potassium resources.
研究领域:
化学工程
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无机化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Renren Sun,Yueru Wang,Haixia He,Yameng Wan,Liyuan Li,Jiao Sha,Gaoliang Jiang,Yu Li,Tao Li,Baozeng Ren
Solubility of melatonin in twelve mono-solvents including seven alcohols {methanol (MT), ethanol (ET), n -propanol ( n -PrA), n -butanol ( n -BT), i -butanol ( i -BT), n -pentanol ( n -PT) and n-hexanol ( n -HeA)} and five esters {methyl acetate (MeAC), ethyl acetate (EtAC), n -propyl acetate ( n -PrAC), n -butyl acetate ( n -BtAC) and n -pentyl acetate ( n -PtAC)} was determined by laser monitoring approach from 278.15 K to 323.15 K under 0.1 MPa. The experimental results indicate that the mole solubility of melatonin shows a positive relation with temperature variation. The solubility of melatonin in the twelve pure solvents at 298.15 K has order: MT (0.03570) > ET (0.02536) > n -PrA (0.01965) > n -BT (0.01524) > n -PT (0.01450) > i -BT (0.01267) > n -HeA (0.01136) > MeAC (0.008498) > EtAC (0.006587) > n -PrAC (0.004280) > n -BtAC (0.003410) > n -PtAC (0.02990). Moreover, the miscibility behavior of melatonin was further analyzed by the Hansen solubility parameter (HSP). The solvent effect of melatonin in tested pure solvents was investigated by using the KAT-LSER model. The four thermodynamic models including two-Suffix Margules, NRTL, NRTL-SAC and UNIQUAC models were applied to correlate the experimental solubility data of melatonin. Furthermore, the dissolution thermodynamic properties including the apparent standard dissolution enthalpy (Δ dis H o ), the apparent standard dissolution entropy (Δ dis S o ) and the apparent standard Gibbs energy change (Δ dis G o ) of melatonin in investigated solvents were calculated by van't Hoff equation.
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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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2020
·
IF 2.888
Xiaojie Wang,Weibiao Du,Xiaopo Wang
The densities of pure ethyl octanoate and n -hexadecane/ethyl octanoate mixtures were measured from 293.15 K to 363.15 K and up to 60 MPa using U -shape vibrating-tube densimeter. The results were correlated as Tait equation, the excess molar volumes, isothermal compressibilities, and isobaric thermal expansivities of the mixtures were calculated and analyzed. In addition, the parameters in the PC-SAFT equation for ethyl octanoate were obtained based on the high-pressure densities obtained in this work and the vapour pressure in the literatures. The densities of the mixtures were predicted by PC-SAFT equation, the absolute average deviations between the experimental results and those calculated were less than 0.52%.
研究领域:
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
·
2018
·
IF 2.196
Yanxiao Zhao,Haiyan Yang,Zeren Shang,Tingting Gong,Xu Zhang,Songgu Wu
Glibenclamide (GCM) is an oral antihyperglycemic drug and widely used to treat type-II diabetes. The quality of the GCM product impacts the efficacy of the medicine. However, the quality of the product is determined by the crystallization process, in which the solubility property plays a significant role. In this study, GCM solubility in 11 monosolvents (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, acetone, acetonitrile, methyl isobutyl ketone, methyl acetate and ethyl acetate) and (acetone + acetonitrile) binary solvents, has been determined through a gravimetric method from 283.15 K to 323.15 K. It elucidates that GCM has the highest solubility in acetone among the 11 monsolvents. Meanwhile, the solubility of GCM in (acetone + acetonitrile) binary solvents increases when the mole fraction of acetone rises. Then, we correlated the solubility data in monosolvents using the modified Apelblat model and nonrandom two-liquid (NRTL) model. Besides, the modified Apelblat model, the CNIBS/R-K model, Jouyban–Acree model, and NRTL model were adopted to fit the data in (acetone + acetonitrile) mixture solvents. Furthermore, thermodynamic properties were calculated on the basis of the NRTL model.
研究领域:
药物化学
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Ying Zhang,Xiong Zheng,Maogang He,Lili Liang,Yutian Chen
Oxygenates are usually used as fuel additives. Recently, di-isopropyl ether (DIPE) has been considered as the potential fuel additive for the replacement of methyl tert-butyl ether (MTBE). So it is essential to research its thermophysical properties. In this paper, the speed of sound in DIPE was measured from 303.15 K to 673.15 K up to 10 MPa using Brillouin light scattering (BLS), including saturated liquid/vapour, and the liquid and supercritical regions. The saturated liquid/vapour and single phase liquid results were fitted as functions of temperature and pressure. The correlations represent the data with AADs of 0.62% for the saturated liquid, 0.44% for the saturated vapour and 0.73% for the liquid, respectively. Moreover, the variation of speed of sound with temperature and pressure was also analysed.
研究领域:
化学工程
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物理学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2016
·
IF 2.74
Xiaojie Wang,Xiaopo Wang,Dongbo Wang
Densities and kinematic viscosities of binary mixtures for ethyl caprate with 1-propanol, 1-butanol, and 1-pentanol were measured at temperatures from 283.15 K to 318.15 K and at ambient pressure (0.1 MPa) over the entire composition range. Excess molar volumes and viscosity deviations of the mixtures were derived from the experimental data and correlated using the Redlich–Kister equation. In addition, viscosities were correlated using the McAllister three-body model, whereas densities were fitted to a third-order polynomial as a function of temperature and mole fraction.
研究领域:
物理化学
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热力学
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流体力学
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2017
·
IF 2.473
Kai Kang,Xiaopo Wang
The experimental measurements for liquid densities of n -decane and p -xylene binary mixtures were performed over the entire composition with a high-pressure vibrating-tube densimeter. The temperature ranges for the present measurement were from 293.15 K to 363.15 K and the pressures were reached to 60 MPa. The experimental uncertainty is estimated to be 0.001 with 0.95 confidence level. Experimental density values were fitted by the modified Tammann–Tait equation. The PC-SAFT equation of state and Cibulka's equation was used to predict the densities of n -decane and p -xylene and its mixtures. In addition, derived volumetric properties, such as the excess molar volumes , the isothermal compressibility , and isobaric thermal expansivity, were calculated from the experimental density data. The effects of pressure and temperature on the derived properties were also discussed.
研究领域:
化学工程
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热力学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Yu Li,Huimin Niu,Zidan Cao,Zheqi Wang,Jiao Sha,Liukai Zhu,Fengxin Guo,Yuanhui Chong,Tao Li,Baozeng Ren
In this paper, it was measured that the solubility of riluzole in three binary mixtures ((ethanol/n-propanol/acetone) + H 2 O) through the method of laser monitoring under 278.15–323.15 K and 0.1 MPa. As expected, the solubility of riluzole in three binary solvents increases with rising temperature. For the acetone + water system, the solubility of riluzole increases monotonously with the increasing mass fraction of acetone. For the ethanol + water system, the solubility order is: ethanol ( ω 1 = 0.8999) > ethanol ( ω 1 = 0.7999) > ethanol ( ω 1 = 0.5999) > ethanol ( ω 1 = 0.7000) > ethanol ( ω 1 = 0.5000) > ethanol ( ω 1 = 0.4000). For the n-propanol + water system, the solubility order is: n-propanol ( ω 1 = 0.8000) > n-propanol ( ω 1 = 0.8998) > n-propanol ( ω 1 = 0.6999) > n-propanol ( ω 1 = 0.6000) > n-propanol ( ω 1 = 0.4999) > n-propanol ( ω 1 = 0.4000) > n-propanol ( ω 1 = 0.2999). The above phenomenon shows that when the mass fraction of ethanol is 0.5999 and the mass fraction of n-propanol is 0.8000, co-dissolution may occur. The solubility data were correlated via five models (modified Apelblat model, λh model, NRTL model, Uniquac model and Wilson model). As a result, we found that the modified Apelblat model has the most satisfactory correlation. Finally, the radial distribution function (RDF) obtained from molecular simulation were employed to analyze the solubility sequence of riluzole in more depth.
研究领域:
药物化学
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物理化学
·
计算化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2023
·
IF 2.6
Weijie Jia,Yuqi Su,Songtao Cao,Ao Dong,Ying Zhang,Maogang He
Mutual diffusion coefficients of three alkanes (n-heptane, n-octane and isooctane) in cyclohexane were measured by digital holographic interferometry under atmospheric pressure. The measured temperature points were 288.15 K, 298.15 K and 308.15 K, respectively and the mass fraction of the measured solution range was from 0.05 to 0.95. The extended relative uncertainty of the measurement system was estimated to be less than 2.4%. The dependence of mutual diffusion coefficient on temperature and solution concentration was studied. The mutual diffusion coefficients of these three binary mixtures increase with the increase of temperature and have a nearly linear relationship with the solution concentration. And the image processing process of holographic interference image is introduced in detail. Zhang et al .’s model, Darken model and Vignes model were used to predict the mutual diffusion coefficients of the three binary mixtures, the absolute average of relative deviations (AARDs) are 2.97%, 3.89% and 6.18%, respectively and Zhang et al .’s model is the one with the best agreement among the three models.
研究领域:
化学工程
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物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 45
·28008-28013
·
IF 3.361
Congcong Gao,Baoquan Che,Hong Dai
EcoRI is an important biomacromolecule in live cells and protects bacterial cells against foreign DNA. In this work, we developed a simple and convenient G-triplex (G3) (5′-TGGGAAGGGAGGGAATTCCCT-3′)-based colorimetric assay for the rapid and selective detection of EcoRI activity and inhibition. The sequence specifically responds to EcoRI in the presence of K+ and hemin to form a G-triplex/hemin complex. Taking advantage of G-triplex, EcoRI activity was investigated under the optimized conditions. The absorption intensity ratio displayed a linear relationship against the concentration of EcoRI in the range 0 to 100 U mL−1, and the detection limit was 5.7 U mL−1. Furthermore, G3 showed good selectivity, and the ability to be used to screen for EcoRI inhibitors, indicating its potential in detection and analysis applications.
研究领域:
分子生物学
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生物化学
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分析化学
✓ 已验证
DOI
PubMed
高影响因子
FLUID PHASE EQUILIBRIA
·
2013
·
IF 2.379
Yumei Kai,Yonghong Hu,Zheng Cao,Xiang Liu,Yan Liu,Wenge Yang
The solubilities of l -malic acid in pure and mixture organic solvents were measured from 278.15 to 323.15 K using the laser monitoring observation system. The modified Apelblat equation, the semi-empirical Buchowski–Ksiazczak λh equation and the Combined Nearly Ideal Binary Solvent/Redlich (CNIBS/R-K) equation were proposed to correlate the experimental data. In pure and mixed solvents, the 100RD (relative deviation) <3.61 and 7.58, respectively, the 10 4 RMSD (root-mean-square deviations) <3.07 and 2.28, respectively, so the equations selected in this work fit the data very well. Van’t Hoff equation was used to predict the dissolution enthalpy and entropy of l -malic acid in the corresponding solvents.
研究领域:
药物化学
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物理化学
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溶液热力学
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药物结晶
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分子药剂学
✓ 已验证
DOI
高影响因子
Pigment & Resin Technology
·
2019
·Vol. 49
·期 2
·154-162
·
IF 0.724
Kangkang Wang,MengQian Wang,Weiwei Lv,Jiming Yao,Wei Zhang,Xiaoyan Li
Purpose An indirect electrochemical reduction and dyeing with indigo were carried out here to solve problems of low dye reduction rate and poor dyeing depth in the current electrochemical dyeing process. Design/methodology/approach Response surface analysis tests were performed to evaluate the effects of ferrous sulfate concentration, medium concentration, sodium hydroxide concentration and reduction time on the reduction efficiency of indirect electrochemical reduction of indigo. Findings The conditions obtained by design-expert optimization showed that the concentration of FeSO 4 ·7H 2 O has the most significant effect on the reduction performance of dye liquor. Under the optimized electrochemical reduction dyeing process, the rate of dye reduction could be reached 91.21 per cent and the K/S value of indirect electrochemical dyeing of indigo can be achieved to 12.96, which is increased by about 9.56 per cent compared with that of Na 2 S 2 O 4 dyeing with the same color fastness basically. Research limitations/implications The recyclability and biodegradability of the dye remain to be explored. Practical implications The strategy presented here can be developed to replace a substantial part of electrochemical dyeing with optimized product quality and reduced environmental pollution in denim production. Social implications The strategy presented here can be developed to replace a substantial part of electrochemical dyeing with optimized product quality and reduced environmental pollution in denim production. Originality/value Application of the Fe(II)-DGS-Abal B complex media system in the indirect electrochemical reduction of indigo.
研究领域:
电化学
·
纺织染整
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）