甲醇制烯烃（MTO）技术实际应用中反应气带蜡及蜡的处置是新出现的难点问题，分析表明，反应气中的蜡状物主要由多甲基苯组成。通过MTO反应机理分析可推断多甲基苯产生的主要原因为：MTO催化剂活性降低后，反应中间体未来得及转化成乙烯、丙烯等即被反应气带出，遇冷后产生结晶。通过调整反应温度、压力、积碳量、空速等反应条件，控制反应气压缩机入口温度，定期采取清理液位计引压管和凝结水泵入口过滤器、加注洗油等措施能够有效解决反应气带蜡问题。

Existence of wax in the process gas and its disposal are new difficult problems in the practical application of methanol to olefin (MTO) technology.Analysis shows that most of waxy substances in the process gas mainly consists of polymethylbenzenes.It can be inferred through analyzing the mechanism of MTO reaction that polymethylbenzenes are intermediates generated in the reaction, which are crystallized into waxes before converted into light hydrocarbons such as ethylene and propylene when the activity of MTO catalyst drops.The problem can be effectively solved by adjusting reaction temperature, pressure, carbon deposit and other process conditions, controlling the temperature at inlet of process gas compressor, regularly cleaning the pressure pipe of the level gauge and the inlet filter of the condensate pump, and regularly filling wash oil.