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Citation: Wang Yi-Xuan, Zhao Jian-Ping, Dai Ming. Vapor-Liquid Equilibrium for Some Polar Aprotic Solvents with Methanol or 1,2-Dichloroethane[J]. Acta Physico-Chimica Sinica, ;1992, 8(05): 636-641. doi: 10.3866/PKU.WHXB19920512 shu

Vapor-Liquid Equilibrium for Some Polar Aprotic Solvents with Methanol or 1,2-Dichloroethane

1.
Research Laboratory of Solution Chemistry, Henan Institute of Chemistry, Zhengzhou 450003

Received Date: 25 March 1991
Available Online: 15 October 1992

Isobaric vapor-liquid equilibrium data have been measured at 99.3 kPa for the binary mixtures of acetone(AON), ethyl acetate(EA), p-dioxane (p-DXN), acetonitrile(AN) or triethylamine (TEA) with methanol or 1,2-dichloroethane (DCE) and of DCE with methanol by using a double ebulliometer. Van Laar equation and Wilson equation were used to correlate VLE data and Barker's method to estimate the vapor composi-tion from (T,x,p) data. Excess Gibbs free energies for the reported binary mixtures were also calculated from the two equations. The values of G~E for the methanol negative. The results are briefly discussed based on the hydrogen bonding between like and unlike molecules and some physical properties of aprotic solvents. Additionally, vapor-liquid equilibrium data for the ternary mixtures, aprotic solvent+MeOH+DCE, were also measured under the given concentration of aprotic solvent.
- Vapor-liquid equilibrium; Excess Gibbs free energy; Methanol; 1,2-di-chloroethane
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