The effect of temperature on the liquid–liquid equilibria of some aliphatic alcohols + di-sodium hydrogen citrate + water systems: Experimental and correlation

Liquid–liquid equilibrium data for the ternary systems (1-propanol, 2-propanol, 2-methyl-2-propanol, 1-butanol and 2-butanol + di-sodium hydrogen citrate + water) were measured at T = 298.15, 308.15 and 318.15 K. The phase-separation ability of the studied systems was discussed on the basis of the solubility of the constitutive alcohol. Furthermore, the effect of temperature on the tie-line at investigated systems was discussed. The Merchuk equation with three parameters as the temperature dependency form was successfully used for the correlation of binodal data in working temperatures. In addition, the experimental tie-line data were reproduced using the Setschenow-type equation, the generalized e-NRTL and generalized Wilson models.