高校化学工程学报

使用ＤＭＡ５５型精密密度计和ＤＭＡ５１２型高压外测量池，测定了乙醇－丙酮体系在温度范围为２８８．１５至３１８．１５Ｋ和压力从常压至１９．５ＭＰａ下的液体密度，并根据密度数据计算了体系的过量体积。应用三重随机局部组成密度模型，预测了该体系在不同压力下的密度和过量体积，取得令人满意的结果。

The liquid densities of the ethanol-acetone system have been measured as a function of composition at temperatures in the range of 288.15K to 318.15K and presaures from ambient to 19.15MPa using an Anton Paar DMA55 density meter with a DMA512 external measuring cell for high pressure.The excess volumes of the mixture were calculated from the densities.The triplet random local eomposition model of mixture density was used to correlate and then to predict the densities and the excess volumes at various temperatures and presaures.The results were in gtal agreement with the experimental data.