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Guoji Liu - One of the best experts on this subject based on the ideXlab platform.
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solid liquid Equilibrium and phase diagram for ternary 2 methyl 1 4 naphthoquinone phthalic anhydride 1 4 dioxane system
Journal of Chemical & Engineering Data, 2017Co-Authors: Fang Zhang, Yanqing Zhu, Guoji LiuAbstract:The solid–liquid equilibria (SLE) in the ternary system of 2-methyl-1,4-naphthoquinone (2-MNQ) + phthalic anhydride (PA) + 1,4-dioxane were determined experimentally by using the isothermal dissolution equilibriam method within temperatures 283.15, 293.15, and 303.15 K, respectively. The ternary phase diagram could be helpful in the separation of 2-MNQ and PA. On the basis of the experimental data on solubilities the phase diagrams of the system were plotted. Two pure solid phases were formed at 283.15, 293.15 and 303.15 K, including pure PA and pure 2-MNQ, which were confirmed and determined by Schreinemakers’ wet residue method. The phase diagram at 283.15 K is similar to those at 293.15 and 303.15 K and the crystalline regions of 2-MNQ and PA decrease with increasing temperature. NRTL and Wilson model were employed to correlate and calculate the solubility data for the ternary system. A comparison between the two models shows that the NRTL model agrees better with the experimental data than those with ...
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solid liquid Equilibrium and phase diagram for the ternary 2 naphthaldehyde o phthalic anhydride 1 4 dioxane system
The Journal of Chemical Thermodynamics, 2016Co-Authors: Fang Zhang, Xiaoqiang Gao, Guoji LiuAbstract:Abstract In this research, Solid-Liquid Equilibrium for the ternary system (2-naphthaldehyde + o-phthalic anhydride + 1,4-dioxane) was measured at 283.15 K, 293.15 K and 303.15 K, respectively. Three isothermal phase diagrams of the system were plotted using the values of the experimental solubility. Pure 2-naphthaldehyde and o-phthalic anhydride were formed at (283.15, 293.15 and 303.15) K, and were determined by Schreinemaker’s wet residue method. The crystallization region of o-phthalic anhydride was found to be much larger than that of 2-naphthaldehyde at a certain temperature. The experimental solubility at multiple temperatures was correlated by the NRTL and Wilson models. The NRTL model was more accurate than the Wilson model in this system. The diagram of density versus component was also constructed.
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solid liquid Equilibrium and phase diagram for the ternary succinic acid glutaric acid water system
Journal of Chemical & Engineering Data, 2014Co-Authors: Yijie Deng, Xiaobo Sun, Guoji LiuAbstract:The solid–liquid equilibria (SLE) data of the ternary system succinic acid + glutaric acid + water were measured at the three given temperatures (298.15, 303.15, and 308.15) K using the isothermal solution dissolution Equilibrium method, and the densities of Equilibrium liquid phase were determined experimentally at the corresponding temperatures. The corresponding isothermal phase diagrams and the diagrams of densities versus mass fraction of component were constructed on the basis of the experimental results. There existed two pure solid phases at (298.15, 303.15 and 308.15) K, including pure succinic acid and pure glutaric acid, which were confirmed and determined by the method of Schreinemaker’s wet residue and X-ray diffraction. The results indicate obviously that there was no solid solution formed in the studied system. The phase diagram at 298.15 K is similar to those at (303.15 and 308.15) K and the crystallization region of glutaric acid is far smaller than that of succinic acid at each temperatu...
Urszula Domanska - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic study of molecular interactions in eutectic mixtures containing camphene
Journal of Physical Chemistry B, 2016Co-Authors: Marcin Okuniewski, Kamil Paduszynski, Urszula DomanskaAbstract:Terpenes are an abundant and diverse class of chemicals having numerous applications in different areas of chemistry. Therefore, a detailed knowledge of physical and thermodynamic properties of terpenes and their mixtures with other compounds is highly desired. This paper reports both a thermodynamic study on solid–liquid Equilibrium (SLE) phase diagrams in binary systems formed by (±)-camphene (a representative terpene) and one of the following solvents: n-decane, n-dodecane, 1-decanol, 1-dodecanol, phenylmethanol, 2-phenylethanol, 2-cyclohexylethanol. The observed trends in the measured SLE data are discussed in terms of structure (alkyl chain length, aromacity) of the solvent and molecular interactions. Modeling of the considered SLE phase diagrams with three well-established thermodynamic models, namely, modified UNIFAC (Dortmund), perturbed-chain statistical associating fluid theory (PC-SAFT) and conductor-like screening model for real solvents (COSMO-RS), is presented. A comparative analysis of thei...
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solid liquid phase equilibria of 1 decanol and 1 dodecanol with fragrance raw materials based on cyclohexane
Journal of Chemical & Engineering Data, 2009Co-Authors: Urszula Domanska, Piotr Morawski, Maria PiekarskaAbstract:The solid−liquid phase equilibria (SLE) of binary mixtures containing 1-decanol or 1-dodecanol and fragrance raw materials based on cyclohexane were investigated. The systems {1-decanol or 1-dodecanol (1) + cyclohexyl carboxylic acid (CCA) or cyclohexyl acetic acid (CAA) or cyclohexyl acetate (CA) or 2-cyclohexyl ethyl acetate (2CEA) or 2-cyclohexyl ethanol (2CE) (2)} have been measured by a dynamic method over a wide range of temperature from (250 to 300) K and ambient pressure. For all systems, SLE diagrams were detected as eutectic mixtures with complete miscibility in the liquid phase. The experimental data were correlated by the Wilson and the nonrandom two-liquid NRTL equation, utilizing parameters derived from the solid−liquid Equilibrium. The average root-mean-square deviations of the solubility temperatures were (0.33 and 0.31) K for the Wilson and the NRTL equations, respectively.
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thermodynamics of binary mixtures of n methyl 2 pyrrolidinone and ketone experimental results and modelling of the solid liquid Equilibrium and the vapour liquid Equilibrium the modified unifac do model characterization
The Journal of Chemical Thermodynamics, 2005Co-Authors: Urszula Domanska, Joanna ŁachwaAbstract:Abstract The (solid + liquid) Equilibrium (SLE) of eight binary systems containing N-methyl-2-pyrrolidinone (NMP) with (2-propanone, or 2-butanone, or 2-pentanone, or 3-pentanone, or cyclopentanone, or 2-hexanone, or 4-methyl-2-pentanone, or 3-heptanone) were carried out by using a dynamic method from T = 200 K to the melting point of the NMP. The isothermal (vapour + liquid) Equilibrium data (VLE) have been measured for three binary mixtures of NMP with 2-propanone, 3-pentanone and 2-hexanone at pressure range from p = 0 kPa to p = 115 kPa. Data were obtained at the temperature T = 333.15 K for the first system and at T = 373.15 K for the second two systems. The experimental results of SLE have been correlated using the binary parameters Wilson, UNIQUAC ASM and two modified NRTL equations. The root-mean-square deviations of the solubility temperatures for all the calculated values vary from (0.32 K to 0.68 K) and depend on the particular equation used. The data of VLE were correlated with one to three parameters in the Redlich–Kister expansion. Binary mixtures of NMP with (2-propanone, or 2-butanone, or 2-pentanone, or 3-pentanone, or cyclopentanone, or 2-hexanone, or 4-methyl-2-pentanone, or 3-heptanone) have been investigated in the framework of the modified UNIFAC (Do) model. The reported new interaction parameters for NMP-group (c-CONCH3) and carbonyl group ( C O) let the model consistently described a set of thermodynamic properties, including (solid + liquid) Equilibrium, (vapour + liquid) Equilibrium, excess Gibbs energy and molar excess enthalpies of mixing. Our experimental and literature data of binary mixtures containing NMP and ketones were compared with the results of prediction with the modified UNIFAC (Do) model.
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solid liquid equilibria for systems containing long chain 1 alkanols ii experimental data for 1 dodecanol 1 tetradecanol 1 hexadecanol 1 octadecanol or 1 eicosanol ccl4 or cyclohexane mixtures characterization in terms of disquac
Fluid Phase Equilibria, 1996Co-Authors: Urszula Domanska, J A GonzalezAbstract:Solid-Liquid Equilibrium temperatures for binary mixtures of long-chain 1-alkanols (1-dodecanol, 1-tetradecanol, 1-hexadecanol, 1-octadecanol and 1-icosanol) and benzene or toluene have been measured by a dynamic method between 276 K and the melting point of the alcohol. These data are used, taking into consideration the two solid-solid first-order transitions observed in the 1-alkanols, to characterize in terms of DISQUAC the hydroxyl-aromatic interactions present in the investigated mixtures. The relative standard deviations for the Equilibrium temperatures are less than 0.01 for most of the systems.
Fang Zhang - One of the best experts on this subject based on the ideXlab platform.
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solid liquid Equilibrium and phase diagram for ternary 2 methyl 1 4 naphthoquinone phthalic anhydride 1 4 dioxane system
Journal of Chemical & Engineering Data, 2017Co-Authors: Fang Zhang, Yanqing Zhu, Guoji LiuAbstract:The solid–liquid equilibria (SLE) in the ternary system of 2-methyl-1,4-naphthoquinone (2-MNQ) + phthalic anhydride (PA) + 1,4-dioxane were determined experimentally by using the isothermal dissolution equilibriam method within temperatures 283.15, 293.15, and 303.15 K, respectively. The ternary phase diagram could be helpful in the separation of 2-MNQ and PA. On the basis of the experimental data on solubilities the phase diagrams of the system were plotted. Two pure solid phases were formed at 283.15, 293.15 and 303.15 K, including pure PA and pure 2-MNQ, which were confirmed and determined by Schreinemakers’ wet residue method. The phase diagram at 283.15 K is similar to those at 293.15 and 303.15 K and the crystalline regions of 2-MNQ and PA decrease with increasing temperature. NRTL and Wilson model were employed to correlate and calculate the solubility data for the ternary system. A comparison between the two models shows that the NRTL model agrees better with the experimental data than those with ...
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solid liquid Equilibrium and phase diagram for the ternary 2 naphthaldehyde o phthalic anhydride 1 4 dioxane system
The Journal of Chemical Thermodynamics, 2016Co-Authors: Fang Zhang, Xiaoqiang Gao, Guoji LiuAbstract:Abstract In this research, Solid-Liquid Equilibrium for the ternary system (2-naphthaldehyde + o-phthalic anhydride + 1,4-dioxane) was measured at 283.15 K, 293.15 K and 303.15 K, respectively. Three isothermal phase diagrams of the system were plotted using the values of the experimental solubility. Pure 2-naphthaldehyde and o-phthalic anhydride were formed at (283.15, 293.15 and 303.15) K, and were determined by Schreinemaker’s wet residue method. The crystallization region of o-phthalic anhydride was found to be much larger than that of 2-naphthaldehyde at a certain temperature. The experimental solubility at multiple temperatures was correlated by the NRTL and Wilson models. The NRTL model was more accurate than the Wilson model in this system. The diagram of density versus component was also constructed.
Mariana C. Costa - One of the best experts on this subject based on the ideXlab platform.
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binary solid liquid Equilibrium systems containing fatty acids fatty alcohols and triolein by differential scanning calorimetry
Fluid Phase Equilibria, 2015Co-Authors: Flávio Cardoso De Matos, Mariana C. Costa, Antonio J A Meirelles, Eduardo A. C. BatistaAbstract:Abstract The solid–liquid phase diagrams of six binary mixtures composed of triolein plus fatty acids (triolein (1) + capric acid (2), triolein (1) + lauric acid (3) and triolein (1) + myristic acid (4)) and triolein plus fatty alcohols (triolein (1) + 1-decanol (5), triolein (1) + 1-dodecanol (6) and triolein (1) + 1-tetradecanol (7)) were studied by differential scanning calorimetry (DSC). Experimental results clearly show that systems formed by triolein + capric acid, triolein + 1-decanol and triolein + 1-dodecanol show eutectic behavior, while for the other binary systems, the occurrence of an eutectic point very close to the melting temperature of pure triolein was observed. Experimental data were used to adjust the parameters of the three-suffix Margules and NRTL models.
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High Pressure Solid-Liquid Equilibrium of Fatty Alcohols Binary Systems from 1-Dodecanol, 1-Tetradecanol, 1-Hexadecanol, and 1-Octadecanol
Journal of Chemical & Engineering Data, 2015Co-Authors: Natália D.d. Carareto, Mariana C. Costa, Antonio J A Meirelles, Jérôme PaulyAbstract:The melting temperatures of four fatty alcohols, 1-dodecanol, 1-tetradecanol, 1-hexadecanol, and 1-octadecanol, were measured at atmospheric pressure using a μDSC calorimeter and at higher pressures (up to 80 MPa) thanks to a dedicated microscope. The solid–liquid phase diagrams of six binary mixtures formed by these fatty alcohols, namely, 1-dodecanol + 1-tetradecanol, 1-dodecanol + 1-hexadecanol, 1-dodecanol + 1-octadecanol, 1-tetradecanol + 1-hexadecanol, 1-tetradecanol + 1-octadecanol, and 1-hexadecanol + 1-octadecanol systems, were also measured using high pressure microscopy within the range of 0.1 MPa to 80 MPa. In addition, the phase diagrams of the 1-dodecanol + 1-tetradecanol, 1-tetradecanol + 1-hexadecanol, and 1-hexadecanol + 1-octadecanol systems were also measured by DSC in order to compare the results obtained from the microscopy. On the basis of the experimental data, it could be concluded that the behavior of the phase diagrams is slightly affected by the pressure, even within very large ...
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on the solid liquid Equilibrium behavior of fatty acids with ethanolamines
MATEC Web of Conferences, 2013Co-Authors: Guilherme J Maximo, Mariana C. Costa, Joao A P Coutinho, Antonio J A MeirellesAbstract:Fatty acids and ethanolamines are commonly used in the synthesis of compounds that are mainly used in pharmaceutical and chemical industry as surfactant agent in addition to play a number of key roles in several other kinds of processes. Taking into account the formulation of mixtures with particular physicochemical properties for product and industrial processes design, information about systems’ phase transitions is frequently required, although these data are yet scarce in the literature. In this work, the Solid-Liquid phase Equilibrium (SLE) diagrams of four systems of monoethanolamine + oleic acid, monoethanolamine + stearic acid, diethanolamine + oleic acid and diethanolamine + stearic acid were determined. The temperature and enthalpy of the thermal transitions of the systems were evaluated by Differential Scanning Calorimetry (DSC) using a DSC8500 calorimeter (PerkinElmer, Waltham). The methodology was based in a cooling-heating cycle in order to evaluate the behavior of the crystallization and melting of the samples. Moreover, density, viscosity, surface tension and optical micrographs of some of the samples among the systems were determined/obtained in order to provide a best understanding of their rheological profile. The experimental results allowed the observation of different regions of solidliquid and solid-solid phase Equilibrium from the diagrams obtained. These regions could be correlated with the physicochemical properties and optical micrographs showing that the systems presented particular temperatureand concentration-dependent phase behaviors. The results suggested that mixtures of fatty acids and ethanolamines presented interesting melting, crystallization and rheological properties for several applications in chemical processes and product formulation. Web of Conferences DOI: 10.1051/
Antonio J A Meirelles - One of the best experts on this subject based on the ideXlab platform.
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binary solid liquid Equilibrium systems containing fatty acids fatty alcohols and triolein by differential scanning calorimetry
Fluid Phase Equilibria, 2015Co-Authors: Flávio Cardoso De Matos, Mariana C. Costa, Antonio J A Meirelles, Eduardo A. C. BatistaAbstract:Abstract The solid–liquid phase diagrams of six binary mixtures composed of triolein plus fatty acids (triolein (1) + capric acid (2), triolein (1) + lauric acid (3) and triolein (1) + myristic acid (4)) and triolein plus fatty alcohols (triolein (1) + 1-decanol (5), triolein (1) + 1-dodecanol (6) and triolein (1) + 1-tetradecanol (7)) were studied by differential scanning calorimetry (DSC). Experimental results clearly show that systems formed by triolein + capric acid, triolein + 1-decanol and triolein + 1-dodecanol show eutectic behavior, while for the other binary systems, the occurrence of an eutectic point very close to the melting temperature of pure triolein was observed. Experimental data were used to adjust the parameters of the three-suffix Margules and NRTL models.
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High Pressure Solid-Liquid Equilibrium of Fatty Alcohols Binary Systems from 1-Dodecanol, 1-Tetradecanol, 1-Hexadecanol, and 1-Octadecanol
Journal of Chemical & Engineering Data, 2015Co-Authors: Natália D.d. Carareto, Mariana C. Costa, Antonio J A Meirelles, Jérôme PaulyAbstract:The melting temperatures of four fatty alcohols, 1-dodecanol, 1-tetradecanol, 1-hexadecanol, and 1-octadecanol, were measured at atmospheric pressure using a μDSC calorimeter and at higher pressures (up to 80 MPa) thanks to a dedicated microscope. The solid–liquid phase diagrams of six binary mixtures formed by these fatty alcohols, namely, 1-dodecanol + 1-tetradecanol, 1-dodecanol + 1-hexadecanol, 1-dodecanol + 1-octadecanol, 1-tetradecanol + 1-hexadecanol, 1-tetradecanol + 1-octadecanol, and 1-hexadecanol + 1-octadecanol systems, were also measured using high pressure microscopy within the range of 0.1 MPa to 80 MPa. In addition, the phase diagrams of the 1-dodecanol + 1-tetradecanol, 1-tetradecanol + 1-hexadecanol, and 1-hexadecanol + 1-octadecanol systems were also measured by DSC in order to compare the results obtained from the microscopy. On the basis of the experimental data, it could be concluded that the behavior of the phase diagrams is slightly affected by the pressure, even within very large ...
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on the solid liquid Equilibrium behavior of fatty acids with ethanolamines
MATEC Web of Conferences, 2013Co-Authors: Guilherme J Maximo, Mariana C. Costa, Joao A P Coutinho, Antonio J A MeirellesAbstract:Fatty acids and ethanolamines are commonly used in the synthesis of compounds that are mainly used in pharmaceutical and chemical industry as surfactant agent in addition to play a number of key roles in several other kinds of processes. Taking into account the formulation of mixtures with particular physicochemical properties for product and industrial processes design, information about systems’ phase transitions is frequently required, although these data are yet scarce in the literature. In this work, the Solid-Liquid phase Equilibrium (SLE) diagrams of four systems of monoethanolamine + oleic acid, monoethanolamine + stearic acid, diethanolamine + oleic acid and diethanolamine + stearic acid were determined. The temperature and enthalpy of the thermal transitions of the systems were evaluated by Differential Scanning Calorimetry (DSC) using a DSC8500 calorimeter (PerkinElmer, Waltham). The methodology was based in a cooling-heating cycle in order to evaluate the behavior of the crystallization and melting of the samples. Moreover, density, viscosity, surface tension and optical micrographs of some of the samples among the systems were determined/obtained in order to provide a best understanding of their rheological profile. The experimental results allowed the observation of different regions of solidliquid and solid-solid phase Equilibrium from the diagrams obtained. These regions could be correlated with the physicochemical properties and optical micrographs showing that the systems presented particular temperatureand concentration-dependent phase behaviors. The results suggested that mixtures of fatty acids and ethanolamines presented interesting melting, crystallization and rheological properties for several applications in chemical processes and product formulation. Web of Conferences DOI: 10.1051/
