Method and equipment for improving selectivity of light olefins

Abstract

The invention discloses a method and equipment for improving the selectivity of low-carbon olefins, which are composed of the following steps: 1) the oxygen-containing compound raw material enters the reactor and contacts with the regenerated catalyst from the pre-reaction section for exothermic reaction; 2) in step 1) The reaction gas enters the built-in separation facility of the reactor to remove the entrained catalyst after removing the catalyst carried; 3) In step 1), the coke-deposited catalyst after the reaction enters the regenerator for charred regeneration; 4) Step 3) The regenerated catalyst enters the regenerated stripper for stripping and cooling, and then enters the pre-reaction section; 5) The pre-reaction medium enters the pre-reaction section after gasification, undergoes an endothermic reaction with the regenerated catalyst, and then enters the reactor. The advantages of adopting the method and equipment provided by the present invention are: by setting the pre-reaction section, the occurrence of unintended reactions is reduced, and the selectivity of low-carbon olefins is improved; by the built-in sleeve in the reactor, the dilute phase space of the reactor is shortened , improving the selectivity of low carbon olefins.

Description

technical field [0001] The invention belongs to the technical field of olefin preparation, and relates to a method and equipment for improving the selectivity of low-carbon olefins in the continuous reaction and regeneration process of generating low-carbon olefins using oxygen-containing compounds as raw materials. Background technique [0002] Light olefins (ethylene, propylene, butadiene) and light aromatics (benzene, toluene, xylene) are the basic raw materials for petrochemicals. The traditional production route of ethylene and propylene is produced through naphtha cracking, and its disadvantage is that it relies too much on petroleum. The production of low-carbon olefins such as ethylene and propylene from methanol (Methanol-To-Olefin, MTO for short) is another process route for producing olefins, and the current process technology development has become mature. The industrialization of MTO technology has opened up a new process route for the production of basic petro...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problem of low selectivity of low-carbon olefins existing in the prior art, and provides a new method and equipment for improving the selectivity of low-carbon olefins

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