Thermodynamic modeling of binary mixtures of ethylenediamine with water, methanol, ethanol, and 2-propanol by association theory.

Association theories by statistical associating fluid theory (SAFT) and cubic plus association (CPA) equation of states (EoS) have effectively handled various thermodynamic purposes thus far; they consider hydrogen bonding effects in associating compounds (those with hydrogen bonds such as water and alcohols) in a proper way. The objective of this work is to thermodynamically undertake the study of ethylenediamine (EDA)-water, EDA-methanol, EDA-ethanol, and EDA-2-propanol binary mixtures in a manner to be useful for designing separation processes by CPA EoS. Accordingly, CPA EoS was applied to model vapor-liquid equilibrium (VLE) of several practical binary mixtures including EDA-water, EDA-methanol, EDA-ethanol, and EDA-2-propanol.