Liquid–liquid equilibria for the ternary system (water + hexadecane + dipropylene glycol n-propyl ether)

• A ternary system water + hexadecane + propylene glycol n-propyl ether was chosen.
• The fish-shaped phase diagram of the ternary system was reported.
• The upper critical solution temperature of the ternary system is 314.00 K.
• LLE data for this ternary system were determined at T = 298.15, 308.15 and 318.15 K under atmospheric pressure.
• The NRTL model was applied to correlate the experimental data.

The 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.