SCREENING OF ADDITION AGENTS FOR EXTRACTIVE DISTILLATION FROM BUBBLE POINT DATA

Abstract

A procedure for screening the solvent for extractive distillation by use only of the bubble point data, which can be easily measured experimentally, is proposed. In this procedure, the bubble point data for a given ternary system and the related binary systems are used to calculate activity coefficients in liquid phase at the ternary infinite dilution and binary activity coefficients, which are combined to determine the relationship between the relative volatility and the solvent concentration. The calculation results are illustrated for two isobaric ternary systems at 1 atm, ethanol-isopropanol -water and acetone-methanol-water.