Recently Killian et al. (https://dx.doi.org/10.1016/j.fluid.2021.113299, https://dx.doi.org/10.1016/j.saa.2022.121837, https://dx.doi.org/10.1021/acs.iecr.3c00968) have demonstrated that infrared spectroscopic data of alcohols in hydrocarbon exhibit cooperative hydrogen bonding that is inconsistent with the widely used Thermodynamic Perturbation Theory 1 (TPT1) association model implemented in the SAFT equation of state. Experimental spectroscopic data are more accurately modeled with Resummed Thermodynamic Perturbation Theory (RTPT) of Marshall and Chapman (https://dx.doi.org/10.1063/1.4834637). RTPT uses a smaller association strength for the dimer and a single larger association strength for all subsequent oligomers. Application of RTPT to phase equilibria was also demonstrated by Killian et al. The model has been published only for a single associating species (alcohol) in an inert solvent. This work extends both TPT1 and RTPT to an inadequately studied ternary mixture with both self- and cross-associating species (ethanol + chloroform + dioxane) and compares vapor-liquid equilibrium (VLE) modeling results from both to experimental VLE data from Gonzalez et al. (https://dx.doi.org/10.1021/je00034a018).
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