The concentration and yield are increased in guide of citral properties by vacuum rectification.And the concentration and average yield is up to 98% and 80.3% respectively.

• 并根据其热敏特性进行了山苍籽油真空精馏的实验研究；使得柠檬醛产品的浓度达到了98%25以上；收率达到了80.；3%25以上。