Modelling of Solubility of Some Parabens in Supercritical Carbon Dioxide and New Correlations

Abstract

In this work, new model correlations were established for the solubility of methyl, ethyl and n-propyl paraben compounds in supercritical carbon dioxide. These correlations constants were compared against the literature data (Asghari-Khiavi and Yamini in Chem Eng Data 48:61–65, 2003; Li et al. in Fluid Phase Equilb 264:93–98, 2008; Chengz et al. in Fluid Phase Equilib 201:79–96, 2002). The new correlations are significantly different and more accurate than the literature-reported correlations. A new expanded liquid model and a new simple density-based model were proposed and successfully used.