本文测定了沸点仪的持液量,其值为1.56 cm~3,应用沸点仪测定了甲醇-乙醇二元系的相平衡数据,与文献数据一致,证明了此测定方法的可靠性。应用沸点仪测得了巴豆醛-三聚乙醛二元系常压下的相平衡数据,同时测取了巴豆醛和三聚乙醛的蒸汽压数据,并用安妥因方程进行了关联。 In this paper, the liquid volume of the boiling point meter was measured and its value was 1.56 cm ~ 3. The phase equilibrium data of the methanol-ethanol binary system were measured by the boiling point instrument. The data was consistent with the literature data, which proves the reliability of this method. The boiling point instrument was used to measure the phase equilibrium data of crotonaldehyde-trimethylacetaldehyde at atmospheric pressure. Meanwhile, the vapor pressure data of crotonaldehyde and trimethylacetaldehyde were measured and correlated with the reaction equation.