Ethanol dehydration using potassium acetate salt effect, extractive distillation

Date

1984-08

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Publisher

Texas Tech University

Abstract

This thesis describes the physical chemistry of recovering absolute ethanol using extractive distillation. The process being evaluated uses dissolved salt, potassium acetate, as the separating agent. The research includes the first successful use of a thermodynamic consistency test for the ethanol-water-potassium acetate (E-W-KOAc) system. This work shows that the Meranda and Furter [1966] data are thermodynamically consistent, while the Costa Novella [1952] data are not. The solvation method is used to predict vapor-liquid equilibrium (VLE) data for the saturated or unsaturated E-W-KOAc ternary system for the first time. The VLE prediction is used in a computer simulation of salt effect, extractive distillation. In order to simulate extractive distillation, measurements of the solubility of potassium acetate in the ethanol-water system at 6 temperatures, 79, 74, 72.5, 65, 61, 59°C and 1 atm were made.

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