该专利涉及一种生产丙烯的方法,以解决现有技术中丙烯产率低、未反应的碳四烯烃没有充分利用等缺点。该方法为:在硅铝摩尔比为20～90的ZSM-5分子筛催化剂作用下乙醇生成含乙烯的物料,含乙烯的物料与含有2-丁烯的正丁烯物料发生歧化反应生成含有丙烯的物料,分离含有丙烯的物料得 The patent relates to a process for producing propylene to address the prior art propylene yield is low, unreacted carbon tetraolefins are not fully utilized and other shortcomings. The method comprises the following steps: an ethylene-containing material is produced by ethanol under the action of a ZSM-5 molecular sieve catalyst with a silica-alumina molar ratio of 20-90, and the material containing ethylene is disproportionated with the n-butene material containing 2-butene to produce a propylene- Materials, the separation of materials containing propene