Phase equilibria of (water–carboxylic acid–diethyl maleate) ternary liquid systems at 298.15K

Experimental determination and correlation of tie line data for the system (water+butyric acid+methylcyclohexane) at four temperatures

“…Kırbaş lar et al [15][16][17] have also presented important equilibrium data for systems consisting of water, BA, and esters. Some important LLE data on ternary aqueous mixtures including BA have been reported by Ç ehreli and Gündogdu [18]. More LLE data for the relative systems have been reported by Uslu et al [19].…”

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

“…In addition, many solvents [3][4][5]7] also extract butyric acid more efficiently than extract propionic acid or acetic acid, in terms of both distribution coefficients and separation factors. The reason is that, carboxylic acids with longer alkane tails are more hydrophobic, thus are more easily enriched in the organic phase.…”

“…The root-mean-square-deviation (RMSD) was used to evaluate the quality of the above correlations, which was calculated from the difference between the experimental and calculated mass fractions according to the following equation: (5) where n is the number of tie-lines, exp x represent experimental mole fraction, cal x stand for calculated mole fraction. Subscripts i, j and k refer to the number of components, phases and tie-lines, respectively.…”

“…Because of the lower energy cost, liquid-liquid extraction is considered as rather an efficient method for carboxylic acids recovery. Many solvents have been used for recovering propionic and butyric acids from aqueous solutions by liquid-liquid extraction [3][4][5][6].…”

Liquid–liquid equilibrium of water+acetic acid+butyl butanoate at 298K and 1 atmosphere

“…The separation of acetic acid from its aqueous form is a challenging industrial problem [1][2][3] and many studies have been reported for the recovery of the acetic acid with different solvents [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. When acetic acid is to be recovered at very high concentration the solvent used has to exhibit almost negligible solubility for water besides satisfying the desired specific characteristics such as high distribution coefficient, high separation factor, good selectivity towards the given solute, and the general characteristics such as boiling point difference between the solvent and extractant, viscosity, density, interfacial tension, corrosiveness, flammability, toxicity, compatibility, availability, and cost [2,[4][5][6].…”