Method for producing alkene from methanol

The invention relates to a method for producing alkene from methanol. The method is a catalyst fluidized-bed continuous reaction regeneration technology for industrialized production of alkene from methanol, and comprises that: methanol is heated to a preheating temperature by a charging system and mixed with diluted vapor, the mixture enters a fluidized-bed reactor and contacts with a catalyst for a reaction at a reaction temperature; with the reducing of catalysit activity, the to-regenerated catalyst is controlled to enter a reactivator for regeneration at a regeneration temperature and further for generation of a regeneration catalyst; and the regeneration catalyst enters the reactor and continues to participate in the reaction, and thus the cycle of the catalyst is realized, wherein the reaction temperature is 495 DEG C. The method provided by the invention helps to guarantee relatively high methanol conversion rate at a relatively low reaction temperature, and is beneficial to reducing of generation amo