Measurement and Correlation of Vapor−Liquid Equilibria for the 2-Propanol + <i>n</i>-Hexane System near the Critical Region

Abstract

Isothermal vapor−liquid equilibrium data of the 2-propanol + n -hexane system were measured at near-critical temperatures to be compared with similar data for the ethanol + n -hexane and methanol + n -hexane systems. The critical pressure was determined from the critical opalescence of the mixtures. A circulating type apparatus with a view cell was used. These mixtures are highly nonideal due to the association of the alcohol. The data could be correlated with sufficient accuracy by using the Peng−Robinson−Stryjek−Vera equation of state with Wong−Sandler mixing rules.