Efficient method for producing low-carbon olefin from oxygen-containing compound

Abstract

The invention discloses an efficient method for producing low-carbon olefin from an oxygen-containing compound in the technical field of petrochemical engineering, which comprises the following steps:preheating a reaction raw material in an auxiliary reaction zone and introducing the preheated reaction raw material into the auxiliary reaction zone through a feeding distributor at the bottom of the auxiliary reaction zone, so that the reaction raw material directly contacts with a high-temperature catalyst from a regenerator, and quickly reacts under the action of the catalyst. The method disclosed by the invention is suitable for the characteristics of rapid reaction, strong heat release, relatively low agent-alcohol ratio, high product selectivity and the like of a process for preparingthe low-carbon olefin from the oxygen-containing compound, so that the problem of relatively low selectivity of the low-carbon olefin in the prior art is solved, the advantages of the reaction are brought into play to the greatest extent, and the selectivity of the low-carbon olefin is improved.

Description

technical field

[0001] The invention belongs to the technical field of olefin preparation, and in particular relates to an efficient method and device for producing low-carbon olefins from oxygen-containing compounds. 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 through the cracking of naphtha, which has the disadvantage of being overly dependent on petroleum. Methanol-to-Olefin (MTO for short) is another process route for producing olefins such as ethylene and propylene from methanol. At present, the development of process technology has become mature. The industrialization of MTO technology has opened up a new process route for the production of petrochemical basic raw materials by gasification of coal or natural gas, which is conducive to changing the traditional coal chemical product ...

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