The hydration reaction catalyzed by the ion-exchange resin,was used to reduce the content of caryophyllene in the heavy turpentine and get the longifolene of high purity.

• 以离子交换树脂作催化剂,利用水合反应降低重质松节油中的石竹烯含量,再经过提纯获得高纯度的长叶烯。