Distilling excessive menthol after reaction, filtering the liquid phase at a high temperature, separating the catalyst, stewing the filtrate for overnight stratification.
反应后蒸馏出多余甲醇，反应液相趁热过滤，分离出催化剂，然后将滤液静置过夜分层。
2
Its advantages include high activity and selectivity of catalyst, easy separating and reuse of catalyst, and low cost.
且催化剂颗粒较大，易于从反应产物中分离，催化剂可重复使用，明显降低了生产成本。
3
The result and some important experimental conditions such as the catalyst and water separating agent were studied.