常压下有机混合物的分离提纯及沸点测定

通过常压下简单蒸馏与分馏的实验研究，阐明双组分体系中温度平台与组分含量、沸点差值之间的关系，得出结论：分离和提纯有机物时，对于组分纯度不高或沸点较为接近的液体混合物，采用分馏方法可测出各组分的温度平台及沸点；若采用简单蒸馏方法，则不会出现明显的温度平台，只有高纯度液态化合物才能测出其沸点；蒸馏方法适用于沸点相差较大的液体混合物的分离。

Separation and Purification of Organic Mixture and Its Mensuration of Boiling Point Under Ordinary Pressure

Under ordinary pressure, the experiment of simple distillation and fractional distillation is studied. The relationship between temperature platform and content or D - value of boiling point in two - component system is explainedAs a conclusion, while separating and purifying organic liquids with low - purity or near- boiling points, their temperature platforms and boiling points will be measured properly by fractionating process; and their temperature platforms will not be founded if measured by simple distillation, only the boiling point of high - purity liquid compounds can be measured accurately by simple distillation; simple distillation just is fit for separating liquid compounds with significant different boiling points.