Recovery method of microspherical catalyst of fluid bed

Abstract

The invention relates to a recovery method of microspherical catalyst for a fluidized bed. The invention provides the method that catalyst to be recovered is mixed with each raw material preparing the fresh microspherical catalyst in certain proportion, the spray drying and the high temperature roasting are performed after the colloid milling of feed pulp, and the microspherical catalyst having the low abrasion index and the suitable particle size distribution can be obtained. The invention has the preparation processes that: firstly, according to the stoichiometric ratio of oxide dry basis, the catalyst to be recovered, molecular sieve initial powder, binding agent, auxiliary agent, pore forming agent, and deionized water are mixed and pulped, and the weight content of the oxide dry basis of recovered catalyst is not more than 80 percent in total blending; secondly, the colloid milling of the feed pulp through a colloid mill is performed, thereby the solid particle diameter contained in the feed pulp is smaller than 20 micron, 90 percent of the particle diameter is small than 10 micron, and 70 percent of the particle diameter is small than 5 micron; thirdly, the spray drying is performed, thereby producing a microspherical sample; fourthly, the microspherical sample is roasted in oxygen-containing atmosphere at 500 to 800 DEG C, thereby obtaining the microspherical catalyst for the fluidized bed. The recovered and prepared microspherical catalyst can be used for the reaction of producing alkene by converting an oxygen compound.

Description

technical field [0001] The invention relates to a method for recovering a microsphere catalyst used in a fluidized bed and the catalytic application of the recovered catalyst in the reaction of converting oxygen-containing compounds into olefins. Background technique [0002] Ethylene and propylene are important basic chemical raw materials. At present, my country mainly adopts light oil cracking method to prepare them. With the shortage of petroleum resources and rising prices, the technology of producing low-carbon olefins through non-petroleum routes is becoming increasingly urgent. The research and development of ethylene and propylene has become a hot spot for domestic and foreign research institutions and major international companies to invest in technology. The single-series and large-scale industrialization technology for producing methanol from natural gas or coal is very mature, so the research on producing olefins (MTO) from methanol has become a key technology ...

AI Technical Summary

Problems solved by technology

The method of recovering and reusing the post-reaction catalyst (carbon-containing sample or sample after roasting) to prepare microsphere catalyst for fluidized bed has not been reported in the literature so far.

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