Ternary (liquid + liquid) equilibria for (water + 1-propanol + dimethyl carbonate, or diethyl carbonate) systems at several temperatures

(Liquid   +   liquid) equilibria data of the (water   +   1-propanol   +   dimethyl carbonate) system at T   =   (293.15, 303.15, 308.15, and 313.15)   K and (water   +   1-propanol   +   diethyl carbonate) system at T   =   (293.15, 298.15, 303.15, 308.15, and 313.15)   K were measured under ambient pressure. The experimental results were correlated with the modified and extended UNIQUAC models. The reliability of the experimental tie-line data was tested through the Othmer–Tobias correlation equation. Distribution coefficients of dimethyl carbonate and diethyl carbonate were calculated from the experimental tie-line data and drawn. The temperature influence on liquid-phase equilibria was studied.