Flash point is a variable used in characterizing fire and explosion hazard of liquids. The partially miscible mixtures are used in heterogeneous distillation process and liquid-liquid extraction process. The purpose of this study is to build a mathematical model to predict the flash point of the ternary partially miscible mixtures of aqueous-organic system. The proposed model was validated by use of water +ethanol + 1-butanol, water + ethanol + 2-butanol and water + 1-butanol + 2-butanol mixtures.
The VLLE parameters were used to estimate the span of the tie lines and their flash point, and the VLE parameters were used to estimate the flash point in mutual solubility region. The flash point prediction model was verified by the experimental data to be able to estimate the range of the miscible and partially miscible phase during the simulation, as well as the constant flash point on each tie line.
