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Citation: TANG Cong-Ming, LI Xin-Li. Computer-assisted Choice of Extractive Solvent in the Distillation of Acetic-H₂O[J]. Chinese Journal of Applied Chemistry, ;2006, 23(9): 1066-1068. shu

Computer-assisted Choice of Extractive Solvent in the Distillation of Acetic-H₂O

TANG Cong-Ming ^, ,
LI Xin-Li

1.
School of Chemistry And Chemical Engineering, China West Normal University, Nanchong 637002

Corresponding author: TANG Cong-Ming,
Received Date: 3 October 2005
Available Online: 17 March 2006

In order to find out effective solvents in extractive distillation,relative volatilities were calculated by means of the Flash unit in Aspen Plus 10.2 simulator.Two Flash operational types and some different thermodynamic models in phase equilibrium were considered respectively.For an acetic acid-water system,the relative volatility of water to acetic acid was given by this method.N-methylacetamide and sulfolane were selected as effective solvents,which have relatively high volatility values.Furthermore,VLE phase diagrams for acetic acid-water-solvent systems were obtained to observe the effect in the whole range of concentration.A binary system of N,N-dimethyl formamide-acetic acid was also calculated,showing the formation of a binary azeotrope.
- flash,
- solvent selection,
- extractive distillation,
- acetic acid
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Computer-assisted Choice of Extractive Solvent in the Distillation of Acetic-H2O

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Computer-assisted Choice of Extractive Solvent in the Distillation of Acetic-H₂O