Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

Liping Lü; Lin Zhu; Huimin Liu; Hang Li; Shirui Sun

doi:10.1016/j.cjche.2018.02.002

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Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

Separation Science and Engineering | Updated：2026-01-06

- Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation
- Chinese Journal of Chemical Engineering Vol. 26, Issue 10, Pages: 2023-2033(2018)
- Affiliations：
  
  2 School of Chemistry and Chemical Engineering, Yangtze Normal University,Chongqing,China,408100
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.02.002
  CLC：
- Published：2018
- Accepted：
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-hexane separation[J]. Chinese Journal of Chemical Engineering, 2018, 26(10): 2023-2033.
DOI：

-hexane separation[J]. Chinese Journal of Chemical Engineering, 2018, 26(10): 2023-2033. DOI： 10.1016/j.cjche.2018.02.002.

摘要

Abstract

Continuous homogenous azeotropic distillation (CHAD) and pressure-swing distillation (PSD) are explored to separate a minimum-boiling azeotropic system of ethyl acetate and n-hexane. The CHAD process with acetone as the entrainer and the PSD process with the pressures of 0.1 MPa and 0.6 MPa in two columns are designed and simulated by Aspen Plus. The operating conditions of the two processes are optimized via a sequential modular approach to obtain the minimum total annual cost (TAC). The computational results show that the partially heat integrated pressure-swing distillation (HIPSD) has reduced in the energy cost and TAC by 40.79% and 35.94%

respectively

than the conventional PSD

and has more greatly reduced the energy cost and TAC by 62.61% and 49.26% respectively compared with the CHAD process. The comparison of CHAD process and partially HIPSD process illustrates that the partially HIPSD has more advantages in averting the product pollution

energy saving

and economy.

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