| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 91 === The objective of this study is to investigate the effects on the liquid-liquid phase equilibrium behavior for mixtures of water/esters/
alcohols in the presence of an electrolyte (potassium acetate or calcium chloride) or a hydrophilic agent (glycerol). Liquid-liquid equilibrium (LLE) data of two ternary mixture, including water + ethanol + ethyl acetate and water + n-butanol + butyl acetate, and six quaternary mixture, including water + ethanol + ethyl acetate + auxiliary agent (glycerol, potassium acetate, or calcium chloride) and water + n-butanol + n-butyl acetate + auxiliary agent (glycerol, potassium acetate, or calcium chloride) were measured at temperatures from 283.15 K~313.15 K. The areas of the two-liquid-phase region were enlarged in presence of the auxiliary agent. The magnitudes of separation enhancement follow the order of CaCl2＞KAc＞glycerol. The NRTL and the Electrolyte-NRTL models were used to correlate the LLE data for the mixtures with or without electrolyte substances. In general, these models represent the LLE behavior reasonably well for the aqueous mixtures with or without electrolyte compounds.
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