In the presence of catalyst phosphoric acid,isomeric addition of bipentene with cis-butenedioic anhydride can form terpenyl bu tenedioic anhydride compound as expoxylite firming agent.

用磷做催化剂，催化工业双戊烯与顺丁烯进行构加。

The distillation system design of isomeric dichlorotoluene and its production process are given in detail in this paper.

详细讨论了氯甲苯构体精馏塔系统的工程设计与生产过程。