AN ANTOINE-TYPE VAPOR PRESSURE EQUATION FOR LIQUIDS AND ITS APPLICATION TO THE PREDICTION OF AZEOTROPIC BEHAVIOR OF BINARY SOLUTIONS

Abstract

A new vapor pressure equation, which is similar in form to the Antoine equation and which contains three vapor pressure parameters, the effective carbon number (N), the polar number (S) and an additional parameter (T), proposed in the previous report, is presented The coefficients in this equation were determined so as to give best fit to the vapor pressure of n-butane to n-octane at low and medium pressure ranges. But it is proved to be useful for reproducing the vapor pressure data of various liquids including some cryogenic liquids at low and medium pressure ranges. The application of this equation to the prediction of the variation of azeotrope with pressure in binary solutions is discussed.