Prediction of mutual solubility and low-pressure VLE using high-precision correlation lines

Binary liquid–liquid equilibrium (LLE) data are correlated using thermodynamic consistency (TC) lines. Of the 283 binaries investigated, 257 have correlation errors less than 3%, providing an average of 0.52%. The average correlation error of the 283 binaries was 2.2%. The TC lines can satisfactorily predict solubilities from near the lower to the upper critical solution temperatures. Furthermore, the TC lines determined from the low-pressure P, x and T, x data can satisfactorily predict the VLE relationships.