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 containedin 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 for a fluidized bed and the catalytic application of the recovered catalyst in the conversion of oxygenated compounds to olefins. Background technique [0002] Ethylene and propylene are important basic chemical raw materials. At present, our country mainly adopts light oil cracking method to prepare. With the shortage of petroleum resources and rising prices, the technology of producing low-carbon olefins from non-petroleum routes has become increasingly urgent. The research and development of ethylene and propylene has become a hot spot of technology investment by domestic and foreign research institutions and major international companies. The single-series, large-scale industrialization technology of methanol production from natural gas or coal has been very mature, so the research of methanol production of olefins (MTO) has become a key technology for the production of low-carbon ...

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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