(Liquid+liquid) equilibria of (water+propionic acid+diethyl succinate or diethyl glutarate or diethyl adipate) ternary systems

Abstract

Liquid + liquid) equilibrium (LLE) data of the solubility (binodal) curves and tie-line end compositions were examined for {water (1) + propionic acid (2) + diethyl succinate or diethyl glutarate or diethyl adipate (3)} at T = 298.15 K and 101.3 ± 0.7 kPa. The relative mutual solubility of the propionic acid is higher in the dibasic esters layers than in the aqueous layers. The reliability of the experimental tie-line data was confirmed by using the Othmer-Tobias correlation. The LLE data of the ternary systems was predicted by UNIFAC method. Distribution coefficients and separation factors were evaluated for the immiscibility region.

Volumetric and viscometric study with FT-IR analysis of binary systems with diethyl succinate and alcohols

“…Since some deviations in refractive index are seen, all three measured properties for diethyl succinate are compared with available literature data [5,6,[15][16][17][18][19][20][21][22][23][24][25] in the whole studied temperature range, and the comparison is presented on Fig. 1.…”

Phase equilibria of (water+propionic acid or butyric acid+2-methoxy-2-methylpropane) ternary systems at 298.2K and 323.2K

“…The solubility curves were determined by the cloud point method in an equilibrium glass cell with a water jacket to maintain isothermal conditions [16]. The binary mixtures of known compositions were prepared by weighing and introduced into the glass cell.…”

“…Other solvents' distribution coefficients are usually lower than 2-methoxy-2-methylpropane [3,16,17,21].…”

Phase diagrams for the aqueous solutions of butyric acid with cyclohexane at different temperatures: Experimental and correlated data

“…Liquid-liquid equilibria (LLE) investigations for ternary aqueous mixtures of carboxylic acids with organic solvents are important in the evaluation of industrial units for solvent extraction processes [1][2][3][4][5][6][7][8][9]. The accurate interpretation of phase equilibria for the different ternary mixtures is a fundamental and important key to improving solvent extraction techniques.…”