Liquid-Liquid Equilibria of 1-Hexanol-Ethanol-Water, 1-Octanol-Ethanol-Water, and 1-Decanol-Ethanol-Water

Ternary liquid-liquid equilibria of 1-hexanol-ethanol-water, 1-octanol-ethanol-water, and 1-decanol-ethanol-water were studied in this research work at the temperature of 30, 40, 50, and 60 ํC. The apparatus was designed in this work for the liquid-liquid equilibrium analysis.The liquid-liquid equilibrium data were fitted nicely with the UNIQUAC model. The UNIQUAC binary interaction parameters are linear function with temperature and dependent on molecular weight of solvent used (1-hexanol, 1-octanol, and 1-decanol). 1-hexanol, 1-octanol, and 1-decanol can be used as a good extractant for ethanol from aqueous solution, owing to the distribution coefficients were greater than 1 and the relative selectivity were much greater than 1.