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

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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

Chemical Engineering Thermodynamics | Updated：2026-01-06

- 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
- Chinese Journal of Chemical Engineering Vol. 28, Issue 1, Pages: 191-197(2020)
- Affiliations：
  
  School of Chemical Engineering and Energy, Zhengzhou University,Zhengzhou,China,450001
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2020
- Accepted：
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Yonghui Dou, Huanxin Li, Xiaoqiang Gao, Guoji Liu, Li Xu. 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[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 191-197.
DOI：

Yonghui Dou, Huanxin Li, Xiaoqiang Gao, Guoji Liu, Li Xu. 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[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 191-197. DOI：

摘要

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 (

) and selectivity (

) 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.

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