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Shen B.,Hunan University | Wang Q.,Hunan University | Wang Y.,Jingchu University of Technology | Ye X.,Zhejiang Shuyang Chemical Co. | And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2013

The solubilities of adipic acid in acetic acid + water mixtures at (303.2 to 333.2) K and acetic acid + cyclohexane mixtures at (303.2 to 343.2) K are measured. The measured solubility of adipic acid in acetic acid + cyclohexane mixtures with the mass fraction of acetic acid in the solvent mixtures at (0.1 to 1.0) decreases with increasing mass fraction of cyclohexane at constant temperature. However, for the solubility of adipic acid in acetic acid + water with the mass fraction of acetic acid in the solvent mixtures at (0 to 1.0), acetic acid with a mass fraction of 50 % has the best dissolving capacity for adipic acid at constant temperature. The experimental data was correlated by the nonrandom two-liquid (NRTL) activity coefficient model, and the values of the solubilities calculated using the model showed good agreement with the experimental observations. © 2013 American Chemical Society.


Gong X.,Hunan University | Wang Q.,Hunan University | Lei F.,Hunan University | Shen B.,Zhejiang Shuyang Chemical Co.
Journal of Chemical and Engineering Data | Year: 2014

Liquid-liquid equilibrium (LLE) data of the ternary system water + cyclohexanol + cyclohexanone was measured from (303.2 to 333.2) K. The reliability of the experimental tie-line data was confirmed by applying the Othmer-Tobias and the Bachman equations. The equilibrium data were correlated with the nonrandom two-liquid (NRTL) and universal quasichemical activity coefficient (UNIQUAC) models. The calculated LLE data for the ternary system agreed well with the experimental data. The root-mean-square deviations (rmsd's) obtained comparing calculated and experimental two-phase compositions are 0.46 % for the NRTL model and 0.44 % for the UNIQUAC model. The obtained interaction parameters can be used in the calculation of LLE for the ternary system water + cyclohexanol + cyclohexanone as well as for the design, simulation, and optimization of the related separation process. © 2014 American Chemical Society.


Wang H.,Hunan University | Wang Q.,Hunan University | Chen C.,Zhejiang Shuyang Chemical Co. | Xiong Z.,Zhejiang Shuyang Chemical Co.
Journal of Chemical and Engineering Data | Year: 2014

Liquid-liquid equilibrium (LLE) data for the ternary system water + benzyl alcohol + benzaldehyde were measured at (303.2 to 343.2) K under atmospheric pressure. The reliability of the experimental LLE data were checked by the Othmer-Tobias and the Hand correlations. The experimental data were correlated by both the (nonrandom two liquid) NRTL and the universal quasichemical activity coefficient (UNIQUAC) models. The relative-mean-standard deviations obtained are 0.16 % by the NRTL model and 0.14 % by the UNIQUAC model. The relevant model interaction parameters were regressed with the experimental data. The distribution coefficients and separation factors were used to discuss the ability of the solvent water to extract benzyl alcohol from binary benzyl alcohol + benzaldehyde solvent mixtures. The results show that the separation factor of benzyl alcohol increased with an increase of the mass of water and decreased with an increase of temperature, which indicates that the extraction separation of benzyl alcohol from binary benzyl alcohol + benzaldehyde mixtures by the extract agent water may be feasible. The obtained results might be used in the separation process for the ternary system water + benzyl alcohol + benzaldehyde. © 2014 American Chemical Society.


Wang H.,Hunan University | Wang Q.,Hunan University | Xiong Z.,Zhejiang Shuyang Chemical Co. | Chen C.,Zhejiang Shuyang Chemical Co.
Journal of Chemical and Engineering Data | Year: 2014

Liquid-liquid equilibrium (LLE) data for the ternary system water + benzyl alcohol + methylbenzene were measured at (303.2 to 343.2) K under atmospheric pressure. The Othmer-Tobias and the Hand correlations were used to check the reliability of the experimental LLE data. The distribution coefficient and separation factor were used to investigate the ability of water to extract benzyl alcohol from methylbenzene. The results show that the distribution coefficient of benzyl alcohol increases with the increasing mass fraction of water in the aqueous phase. The experimental data were correlated by both the nonrandom two-liquid (NRTL) and the universal quasichemical (UNIQUAC) activity coefficient models. The relevant model interaction parameters were regressed by data fitting. The model calculated results show good agreement with the measured data. The obtained interaction parameters can be used in the calculation of LLE for the ternary system water + benzyl alcohol + methylbenzene as well as for the design and optimization of the related separation process. © 2014 American Chemical Society.


Wang H.,Hunan University | Wang Q.,Hunan University | Xiong Z.,Zhejiang Shuyang Chemical Co. | Chen C.,Zhejiang Shuyang Chemical Co.
Fluid Phase Equilibria | Year: 2014

Liquid-liquid equilibrium (LLE) data for the ternary system of water + benzaldehyde + toluene have been determined at (303.2-343.2) K under atmospheric pressure. The Othmer-Tobias and the Hand correlations were used to check the reliability of the experimental data. The obtained LLE data were correlated by both the NRTL and UNIQUAC activity coefficient models. The relevant interaction parameters were extracted by the regression of the experimental data. The calculated values by these two models show good consistency with the measured data. The relative-mean-standard deviations obtained is 0.82% by the NRTL model and 0.12% by the UNIQUAC model. The obtained interaction parameters might be used in the calculation of LLE for the ternary system water + benzaldehyde + toluene as well as for the design and optimization of the related separation process. © 2014 Elsevier B.V.

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