Elsevier

Fluid Phase Equilibria

Volume 239, Issue 2, 31 January 2006, Pages 133-137
Fluid Phase Equilibria

Isobaric vapour–liquid equilibria for binary mixtures of 1,2-dibromoethane with 1,2-dichloroethane, trichloromethane, and 1,1,2,2-tetrachloroethane at atmospheric pressure

https://doi.org/10.1016/j.fluid.2005.10.020Get rights and content

Abstract

Vapour–liquid equilibria at atmospheric pressure have been determined for binary mixtures of 1,2-dibromoethane + 1,2-dichloroethane, +trichloromethane, and +1,1,2,2-tetrachloroethane. These have been shown to be thermodynamically consistent.

Introduction

Halogenated hydrocarbons find applications as solvents, reaction media, reaction intermediates, and refrigerants. Increasing concern about their environmental impact has resulted in more stringent regulations being imposed on plant design. This, in turn, requires more detailed knowledge of the relevant phase equilibria. We have previously reported vapour–liquid equilibria for binary mixtures of chlorinated alkanes and chlorinated alkanes with n-heptane (Al-Hayan and Newsham [1]), and for binary mixtures of halogenated benzenes (Al-Hayan and Newsham [2]). In this continuing series we report new measurements of vapour–liquid equilibria at atmospheric pressure for binary mixtures of 1,2-dibromoethane + 1,2-dichloroethane, +trichloromethane, and +1,1,2,2-tetrachloroethane.

Section snippets

Materials

The 1,2-dibromoethane was supplied by Merck and had a minimum purity of 99.0 mass%. The 1,2-dichloroethane, trichloromethane, and 1,1,2,2-tetrachloroethane were supplied by FLUKA and had minimum purities of 99.5 mass%, 99.8 mass%, and 99.0 mass%, respectively. These were all used without further purification. In Table 1, the measured normal boiling points are compared with the values reported in the literature and with the values obtained from the Antoine constants used in this work. It also shows

Results and discussion

The results of the vapour–liquid equilibrium measurements are given in Table 2, Table 3, Table 4. The measured boiling temperatures have been corrected to standard atmospheric pressure using known pure component vapour pressures and by assuming that over small temperature ranges, the liquid phase activity coefficients are constant. This was done as follows. The vapour pressure of the mixture is given byP=γ1x1P1°+γ2x2P2°Differentiation of the above gives an expression from which the temperature

Conclusion

In this work, vapour–liquid equilibrium data have been determined for 1,2-dichloroethane + 1,2-dichloroethane, +trichloromethane, and +1,1,2,2-tetrachloroethane. The data have been shown to be highly thermodynamically consistent. Further data and analyses for halogenated hydrocarbons will be reported at a later date.

    List of symbols

    aij

    Wilson interaction parameter between components i and j

    Ai

    Antoine coefficient A of component i

    Bi

    Antoine coefficient B of component i

    Ci

    Antoine coefficient C of component i

    g

    GE/RT

    GE

Acknowledgments

The authors wish to thank Kuwait Foundation for the advancement of Sciences (KFAS) and the Public Authority for Applied Education and Training (PAAET), Kuwait, for providing them with a grant that enabled them to conduct this research.

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