香兰素合成产物的精制新法

A new refinement of synthetic vanillin

香兰素合成产物的精制新法王立兴（陕西师范大学化学系，西安７１００６２；作者，男，５９岁，讲师）在对香兰素合成产物进行蒸馏分离和水结晶时，发现文献［１］中的方法存在缺陷．本文利用在不同的温度下物质溶解度不同的性质及其物质颜色的差异和物质表面张力的不同，...

Vanillin, disposed of impurity, is to be recrystallized in vaqueous media under controlled temperature in varying degrees. The content of vanillin can be as high as 99.8% in the process of the recrystallizations which can be done without distillation of the crude product for improvement.