A kind of methanol-to-olefins method

Abstract

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 amount of coke and reaction byproducts.

Description

technical field [0001] The invention relates to a methanol-to-olefins method, in particular to an industrialized methanol-to-olefins catalyst fluidized bed continuous reaction regeneration process (method). Background technique [0002] With the sustained and rapid economic development, the consumption of chemicals produced with ethylene and propylene as basic raw materials has been increasing year by year. For example, China’s ethylene and propylene have been in short supply for a long time, and the imports of chemicals produced using ethylene and propylene remain high. Almost all ethylene and propylene in the world are produced using light hydrocarbons, condensate oil, and naphtha as raw materials. Since China’s dependence on foreign oil has exceeded 50%, non-petroleum routes are used to produce methanol, and then methanol is converted through catalytic conversion. It is of great significance to produce light olefins such as ethylene and propylene. [0003] In today's pet...

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Problems solved by technology

[0007] In the test run stage of the device, the regeneration capacity of the catalyst was insufficient, the reaction conversion rate was low, and the selectivity was poor. Through the test run, it was also found that the device was limited by insufficient regeneration coke load and high sewage discharge indicators, and could not reach the full-load operating condition. To obtain greater economic benefits, it is important to increase the load of the device and the selectivity of the target product

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