作者: U. Domańska , J.A. González
DOI: 10.1016/S0378-3812(98)00236-2
关键词: Melting point 、 Thermodynamics 、 Eutectic system 、 Enthalpy 、 Hydrocarbon 、 Chemistry 、 Group contribution method 、 Alkane 、 Binary system 、 Alcohol
摘要: Abstract Solid–liquid equilibrium temperatures for tert-butanol+n-alkanes (C18, C19, C20, C21, C22, C23, C24, C25, C26, C28) systems have been measured by a dynamic method from 298.15 K to the melting point of alkane. All present an eutectic at very low concentration alcohol. A first-order transition was observed many n-alkanes considered. The experimental values are compared with those given DISQUAC model using interaction parameters previously determined on basis vapor–liquid equilibria, VLE, and molar excess enthalpies, HE, containing lower (n-C6, n-C7). Calculations were developed taking into account solid–solid alkanes. mean relative standard deviation is 0.0073. Differences between data calculated results SLE HE analysed in terms Patterson effect. possibility improving predictions modifying only third dispersive interchange coefficient discussed. Two this parameter proposed depending n, hereafter number C atoms n-alkane (n≤8 n≥9). In way, variation temperature better represented including longer n-alkanes. Predictions remain unchanged, because they depend essentially first coefficients when range considered, as case, rather narrow.