Determination of the Critical Temperature and Critical Pressure of Five Compounds

The critical properties of five compounds, including propanal,butanal, 1-pentanal, 2-methel butanal and trimer of ethanal, weredetermined for the first time by a new capillary quick-flow method.The apparatus was improved with a capillary tube and checked withhexane and 10heptene as standard reagents. The experimental resultsproved that the determination of critical properties by quick-flowmethod with a capillary tube apparatus was successful.

星天牛聚集信息素合成研究

以价廉易得的四氢呋喃和1-庚醇为起始原料,分别经过开环反应、保护反应、取代反应、去保护反应和氧化反应,合成了星天牛聚集信息素4-(正庚氧基)-1-丁醇和4-(正庚氧基)-1-丁醛,二者的总收率分别为47%和41%;产物结构利用核磁共振氢谱进行了表征,产品的纯度利用气相色谱仪进行检测。本工艺原料易得,反应条件温和可控,无安全隐患,易于操作,适合放大生产。