Vapor-liquid equilibria of the carbon tetrachloride, cyclohexane and isopropyl alcohol system.

Abstract

The vapor-liquid equilibrium data of the binary and the ternary systems of carbon tetrachloride, cyclohexane and isopropyl alcohol at a pressure of 760 mm Hg were determined. A Gillespie type still with modification was used. The density and refractive index were used to analyse the vapor and liquid samples. Temperature was measured by means of a copper-constantan thermocouple. An azeotrope was found for carbon tetrachloride - isopropyl alcohol, cyclohexane - isopropyl alcohol and the ternary system. The Gibbs-Duhem equation for a binary system at constant pressure was used to check the consistency of the binary data. All three binary systems data were found to be thermodynamically consistent. The three-constant Redlich-Kister equation for the binary system was found to represent all the three binary systems under investigation and the thirteen-constant, (nine binary constants and the four ternary constants) Redlich-Kister equation was found to represent the ternary system.