Experimental Determination and Modeling of Liquid–Liquid Equilibrium for Ternary Mixtures of Ethylene Glycol + 1,2-Butanediol + 3-Heptanone or Anisole
- Chunli LiChunli LiNational-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering, Hebei University of Technology, Tianjin, 300401, ChinaMore by Chunli Li
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- Xuefei WangXuefei WangNational-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering, Hebei University of Technology, Tianjin, 300401, ChinaMore by Xuefei Wang
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- Hao Li*Hao Li*E-mail: [email protected]National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering, Hebei University of Technology, Tianjin, 300401, ChinaMore by Hao Li
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- Cong DuanCong DuanNational-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering, Hebei University of Technology, Tianjin, 300401, ChinaMore by Cong Duan
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- Le AnLe AnNational-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering, Hebei University of Technology, Tianjin, 300401, ChinaMore by Le An
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- Qing LiuQing LiuNational-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering, Hebei University of Technology, Tianjin, 300401, ChinaMore by Qing Liu
Abstract
Experimental liquid–liquid equilibrium (LLE) data for the system ethylene glycol (EG) + 1,2-butanediol (1,2-BD) + 3-heptanone were measured at atmospheric pressure at 293.15, 303.15, and 313.15 K and the ternary LLE for systems of EG + 1,2-BD + anisole were also investigated at 303.15 K at 101.3 KPa by using liquid–liquid equilibrium kettle method. Distribution coefficient and selectivity were obtained and applied to evaluate the extraction capacity of 3-heptanone and anisole. The reliability of the experimental data was confirmed by the Hand correlation and the Othmer–Tobias correlation. The experimental LLE data were correlated by NRTL and UNIQUAC models, and the corresponding parameters were obtained. The root-mean-square deviations (RMSD) between the experimental data and calculated values were less than 1.22%. Topological concepts related to the Gibbs stability test were used to validate the consistency between model parameters and experimental data. The liquid–liquid equilibrium data provide the basic physicochemical properties for design of extraction process of 1,2-BD from EG by 3-heptanone and anisole. According to comprehensive correlation coefficient analysis, 3-heptanone is more suitable for the extraction of 1,2-BD from EG than anisole.
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