在DMTO-Ⅱ装置上，C₄+催化裂解工艺实现了与甲醇制烯烃工艺的耦合，实现了一种催化剂同时催化2个性质截然不同的反应。通过对C₄+裂解技术的生产实践，摸索总结了相关工艺控制参数和技改技措经验，并经过设备和工艺的不断改进，成功实现了C₄+裂解技术在甲醇制烯烃工艺中的应用。

In a DMTO-Ⅱ plant,the coupling between C₄+ alkenes catalytic cracking process and methanol to olefins process is achieved,in which,a single catalyst is used to catalyze two very different reactions at the same time.Through the industrial application of C₄+ alkenes catalytic cracking technology,corresponding process control parameters and technical renovation experiences are explored and summed up.The C₄+ alkenes catalytic cracking technology is successfully applied in methanol to olefins process after experiencing continuous improvements in equipment and technology.