Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (1): 191-197.doi: 10.1016/j.cjche.2019.06.009

• Chemical Engineering Thermodynamics • Previous Articles     Next Articles

Investigation of liquid-liquid equilibrium of the ternary system (water+1,6-diaminohexane+2-methyl-1-propanol or 3-methyl-1-butanol) at different temperatures

Yonghui Dou, Huanxin Li, Xiaoqiang Gao, Guoji Liu, Li Xu   

  1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
  • Received:2018-11-28 Revised:2019-06-10 Online:2020-01-28 Published:2020-03-31
  • Contact: Guoji Liu, Li Xu;

Abstract: In this study, the LLE data of ternary system (water+1,6-diaminohexane+2-methyl-1-propanol) and (water+1,6-diaminohexane+3-methyl-1-butanol) were measured at 293.15, 303.15 and 313.15 K under atmospheric pressure. Reliability of the experimental tie-line data was checked by empirical Hand, Othmer-Tobias and Bachman equations. Distribution coefficient (D) and selectivity (S) were calculated in order to investigate capability of the studied organic solvents for 1,6-diaminohexane extraction. The high values of separation factors demonstrated that 2-methyl-1-propanol and 3-methyl-1-butanol were applicable for this purpose. The experimental data were correlated by nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) models. The percent-root-mean-square deviation (RMSD) values for NRTL and UNIQUAC models were less than 0.15, which indicated that the experimental data have been sufficiently correlated.

Key words: Liquid-liquid equilibrium, 1,6-Diaminohexane, 2-Methyl-1-propanol, 3-Methyl-1-butanol, NRTL, UNIQUAC