Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation

Chunli Li; Yuanyuan Song; Jing Fang; Yang Liu; Weiyi Su; Yuqi Hu

doi:10.1016/j.cjche.2016.08.011

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Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation

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

- Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation
- Chinese Journal of Chemical Engineering Vol. 25, Issue 3, Pages: 274-277(2017)
- Affiliations：
  
  School of Chemical Engineering and Technology, Hebei University of Technology,Tianjin,China,300130
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.08.011
  CLC：
- Published：2017
- Accepted：
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Chunli Li, Yuanyuan Song, Jing Fang, Yang Liu, Weiyi Su, Yuqi Hu. Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation[J]. , 2017, 25(3): 274-277.
DOI：

Chunli Li, Yuanyuan Song, Jing Fang, Yang Liu, Weiyi Su, Yuqi Hu. Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation[J]. , 2017, 25(3): 274-277. DOI： 10.1016/j.cjche.2016.08.011.

摘要

Abstract

The separation of ternary mixture of butanol

butyl acetate

andmethyl isobutyl ketone (MIBK)was initially analyzed by the residual curve. In this process

MIBK was chosen as the azeotropic agent during the first step of separation. The optimum mass ratio of extra MIBK was 1.6 in the modified feed stream according to the residual curve. Thus on this condition the top product was butanol-MIBK azeotrope while the bottom product was butyl acetate in the preliminary separation of the mixture. Then the butanol and MIBK azeotrope was separated by the double effect pressures wing distillation with the low pressure column performing at 30 kPa and the atmospheric pressure column at 101 kPa. The optimal operating conditions were then obtained by using Aspen Plus to simulate and optimize the process. The results showed that the mass purities of butanol

butyl acetate

and MIBK were all more than 99% and reached the design requirements. Additionally

compared with the traditional distillation with outside heating

the double effect pressure swing distillation saved the reboiler duty by 48.6% and the condenser duty by 44.6%.

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