a b s t r a c tThe fish-shaped phase diagram of the ternary system (water + hexadecane + dipropylene glycol n-propyl ether) under atmospheric pressure was performed at constant water/hexadecane mass ratio (1/1). The upper critical solution temperature of the ternary system was determined as 314.00 K. Liquid + liquid equilibria of the system were measured at T = 298.15, 308.15, and 318.15 K under atmospheric pressure. The experimental data of liquid-liquid equilibria were further correlated with the NRTL model.
Liquid–liquid and three-liquid-phase equilibria of a ternary system: water + tetradecane + propylene glycol n-propyl ether were measured at (298.15, 308.15, and 318.15) K under atmospheric pressure. The system exhibits one three-liquid-phase-coexisting tie triangle and three two-liquid-phase-coexisting envelopes in the triangle phase diagram at these three temperatures. The experimental data were further correlated with the nonrandom two-liquid (NRTL) model, and the average deviation of compositions was 0.0157 mass fraction.
Experiments of the fish-shaped and triangle phase diagrams
of the
water + dodecane + 1-(1-methyl-2-propoxyethoxy)-2-propanol (C3P2) system were performed under atmospheric pressure.
It was found that the upper and the lower critical solution temperatures
of this ternary system are, respectively, (287.20 ± 0.05 and
275.00 ± 0.05) K according to the fish-shaped phase diagram.
Triangle phase diagrams exhibit only one two-liquid-phase-coexisting
region at (288.15, 298.15, and 308.15) K, above the upper critical
solution temperature. The nonrandom two-liquid (NRTL) model was used
to correlate the experimental data of triangle phase diagrams at these
three temperatures.
Liquid-liquid equilibria of a ternary system, water þ hexadecane þ propylene glycol n-propyl ether, were measured at temperatures ranging from (298.15 to 333.15) K under atmospheric pressure. At 298.15 K, the system exhibits only one twoliquid-phase-coexisting envelope in the triangle phase diagram. The system exhibits one three-liquid-phase-coexisting tie triangle and three two-liquid-phase-coexisting envelopes in the triangle phase diagram for the temperature ranging from (308.15 to 333.15) K. The experimental data were successfully correlated with the NRTL model.
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