Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (05): 636-641.doi: 10.3866/PKU.WHXB19920512

• ARTICLE • Previous Articles     Next Articles

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

Wang Yi-Xuan; Zhao Jian-Ping; Dai Ming   

  1. Research Laboratory of Solution Chemistry, Henan Institute of Chemistry, Zhengzhou 450003
  • Received:1991-03-25 Revised:1992-03-09 Published:1992-10-15
  • Contact: Dai Ming

Abstract: 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.

Key words: Vapor-liquid equilibrium, Excess Gibbs free energy, Methanol, 1,2-di-chloroethane