摘要
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.
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.
出处
《韶关学院学报》
2005年第6期73-76,共4页
Journal of Shaoguan University
关键词
有机混合物
分馏
沸点测定
实验方法
试剂
器材
simple distillation
fractional distillation
boiling point mensuration
