Liquid phase equilibria of (water+phosphoric acid+1-butanol or butyl acetate) ternary systems at T=308.2K

Phase equilibria of (water+levulinic acid+dibasic esters) ternary systems

“…levulinic acid from water. Several studies have been carried out to present LLE data to extract levulinic acid from its dilute aqueous solutions [19][20][21]. In this paper, we report the LLE results for the three ternary system (water + levulinic acid + dimethyl succinate), (water + levulinic acid + dimethyl glutarate) and (water + levulinic acid + dimethyl adipate) at T = 298.15 K, for which no such data were available.…”

Experimental and correlational study of phase equilibria in aqueous mixtures of phosphoric acid with aromatic hydrocarbons at various temperatures

“…The UNIQUAC structural parameters (r and q) were taken from references [24,44] and are presented in table 1. The values of r and q for PA were used 3.00 and 4.00, respectively [22].…”

Purification of Phosphoric Acid by Liquid‐Liquid Equilibrium

“…In recent years, significant investigations on LLE measurements and the extraction of phosphoric acid from aqueous solutions have been carried out, while many solvents have mainly been tested, in order to understand and provide further information for accurate interpretation of phase equilibria of the different multicomponent mixtures with phosphoric acid [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. As a detailed evaluation of extraction abilities of the different solvents reported in the literature, including alcohols, esters, ethers, ketones, and hydrocarbons to extract phosphoric acid from aqueous solutions, a comparative study is listed in Table 2.…”

“…Aided by these activity coefficient equations and a parameter fit, it is possible to reproduce the measurement and control the data. The non-random twoliquid (NRTL) [52] and the universal quasi-chemical (UNIQUAC) [53] methods have been successfully applied for the correlation of many ternary and quaternary liquid-liquid phase equilibrium solutions [12,[16][17][18][19][24][25][26], while a group contribution approach (UNIFAC) [54] may be utilized to predict the LLE mixtures.…”