Phase equilibria of binary systems nonadecane—decaline and heneicosane—decalin

Abstract

On the basis of studies prepared by composition of the eutectic binary systems nonadecane—decaline and heneicosane—decaline and given their phase diagrams, some not only experimental method, but calculations based on EFLCP model, RSM model and equation Schroeder—Le Chatelier. For a description of the thermodynamic behavior of these binary systems was developed semi-empirical model VD-AS (Virial Decomposition Asymmetric Model), based on the virial expansion of excess molar Gibbs energy solution for the mole fractions of components. The values of coefficients defined by equation Schroeder—Le Chatelier, by model and RSM EFLCP for the systems studied. Based on the phase diagram of the “solid—liquid” data revealed that the theoretical value of the melting temperature of the eutectic composition has a relative deviation from the experimental data obtained from the equation Schroeder—Le Chatelier. Make sure to note that the right branch of the liquidus obtained experimental method has a significant deviation from the liquidus line, the resulting calculation formula Schroeder—Le Chatelier, but well described by the equation obtained by EFLCP model. Dependence of the refractive index on the content of the alkane in the systems was studied. Refs 16. Figs 3. Tables 5.