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Li C.,Hunan University | Wang Q.,Hunan University | Xiong Z.,Quzhou Qunying Chemical Technology Co. | Chen C.,Quzhou Qunying Chemical Technology Co.
Fluid Phase Equilibria | Year: 2015

By static analytical equilibrium method, the solubilities of 5,10,15,20-tetraphenylporphyrin (TPP) in propionic acid. +. water solvent mixtures and 5,10,15,20-tetraphenylporphyrin manganese(III) chloride (TPPMnCl) in N,. N-dimethylformamide. +. water solvent mixtures were measured from 303.2. K to 343.2. K under atmosphere pressure. The results show that both the solubilities of TPP and TPPMnCl increased with temperature from 303.2. K to 343.2. K. The solubilities of TPP were maximal in pure propionic acid and TPPMnCl were maximal in pure N,. N-dimethylformamide, afterwards, the solubility markedly decreased as the mole fraction of water increased in binary solvents mixture at experiment temperatures. The modified Apelblat equation was applied to correlate the experimental data. The solubilities calculated by the modified Apelblat equation were in good agreement with experimental data. The thermodynamic parameters including dissolution enthalpy, dissolution entropy, isobaric heat capacity, and Gibbs free energy of TPP in propionic acid. +. water solvent mixtures and TPPMnCl in N,. N-dimethylformamide. +. water mixtures were obtained by combining both the modified Apelblat equation and Clark-Glew equation. © 2015 Elsevier B.V. Source


Li C.,Hunan University | Wang Q.,Hunan University | Shen B.,Quzhou Qunying Chemical Technology Co. | Xiong Z.,Quzhou Qunying Chemical Technology Co. | Chen C.,Quzhou Qunying Chemical Technology Co.
Journal of Chemical and Engineering Data | Year: 2015

The mole fraction solubilities of 5,10,15,20-tetraphenylporphyrin (TPP) and 5,10,15,20-tetra(p-chlorophenyl)porphyrin (p-ClTPP) in binary system N,N-dimethylformamide (DMF) + water solvent mixtures were measured at atmospheric pressure by using the static method. The temperature and effects of mole fraction of DMF in the solvent mixtures on solubility were studied. The results show that the solubilities of TPP and p-ClTPP increase with the increasing temperature for a certain solvent composition, and the solubilities show a maximum in pure DMF, then the solubilities decrease when the water was added to the system. The experimental data were correlated with modified Apelblat equation. The solubilities calculated by the model were in good agreement with experimental observations. Thermodynamic parameters such as dissolution enthalpy, isobaric heat capacity and Gibbs energy were obtained from the solubility data by using the Clark-Glew equation together with the modified Apelblat equation. The result demonstrated that the dissolving process of TPP and p-ClTPP in DMF + water solvent mixtures is endothermic and not spontaneous. © 2015 American Chemical Society. Source


Shen Z.,Hunan University | Wang Q.,Hunan University | Shen B.,Quzhou Qunying Chemical Technology Co. | Chen C.,Quzhou Qunying Chemical Technology Co. | Xiong Z.,Quzhou Qunying Chemical Technology Co.
Journal of Chemical and Engineering Data | Year: 2015

Liquid-liquid equilibrium (LLE) for ternary systems water + acetic acid + m-xylene and water + acetic acid + o-xylene were measured at (303.2 to 343.2) K and under atmospheric pressure. The consistency of the experimental tie-line data was checked by both the Othmer-Tobias and the Hand equations as well as verified by comparison with the literature data. Both the nonrandom two-liquid (NRTL) and universal quasichemical activity coefficient (UNIQUAC) models were adopted to correlate the measured LLE data, and the binary interaction parameters were obtained by data-fitting. The predicted LLE data by using the obtained model parameters show good consistency with the literature data. It indicates the obtained binary NRTL and UNIQUAC model interaction parameters could be used in the calculation of LLE for the ternary systems water + acetic acid + m-xylene and water + acetic acid + o-xylene as well as for the design, simulation, and optimization of the related separation process. © 2015 American Chemical Society. Source

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