Predictive UNIQUAC: A new model for the description of multiphase solid-liquid equilibria in complex hydrocarbon mixtures

A predictive version of the UNIQUAC model is proposed for the description o f the nonideality of paraffinic solid solutions. With this model, and using only pure component properties, is possible to adequately predict the phas e behavior of complex hydrocarbon mixtures. Both liquid and solid phase com positions as well as the fraction of crystals in a partly frozen solution s how a good agreement with experimental data from different authors. Unlike previous models, predictive UNIQUAC can deal with the multiple solid phases forming in a paraffinic mixture overcoming one of the main Limitations of hydrocarbon SLE modeling.