Method for preparing catalytic cracking catalyst

Abstract

The invention relates to a method for preparing a catalytic cracking catalyst, which comprises the following steps: (1) weighting zeolite, a binder precursor, a substrate precursor and a pulpable intermediate; (2) forming a solid-liquid slurry containing the zeolite, the binder precursor, the substrate and the pulpable intermediate; (3) stirring and / or grinding the slurry, performing a uniform mixing and uniformization to the above components to realize the refinement of particle size; (4) converting catalyst slurry into molded particles, and converting the molded catalyst particles into a catalyst finished product by drying or calcinating. The solid content in the catalyst formula is 30%-65%, the addition of the solid content enables a great addition to the apparent density of the catalyst, the addition of the catalyst bulk density enables a close association with the enhancement of the wearing performance, accordingly, the addition of the catalyst bulk density is capable of reducing the volume load of the catalyst or filling more catalyst in a given volume of a reactor.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a method for preparing a catalytic cracking catalyst. Background technique [0002] Beginning in 1990, economic growth in Asia boosted gasoline demand, especially in China. Known as the technology behind gasoline production, catalytic cracking is a catalytic process that uses microsphere catalysts to convert petroleum fractions into cracked gasoline. A key role of the microsphere catalyst is to convert the macromolecules of hydrocarbons into higher octane C 4 -C 10 , the activity of this catalyst is high during the conversion process, this function is mainly provided by the acid sites, in order to have high activity, high acid site density and strong acid sites are necessary. However, the combination of high acid site density and strong acid sites often causes serious coking and shortens the service life of the catalyst. In order to maintain the activity of the catalyst, coking (remo...

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Problems solved by technology

These small particles may be carried out of the reactor as catalyst powder and dust. In order to maintain the activity of the whole system (to compensate for the loss of catalyst and the decline in activity), fresh catalyst must be added, or the so-called catalyst compensation, due to catalyst cracking The higher the catalyst loss and the higher the catalyst compensation rate, the higher the operating cost of the catalyst will naturally be. In addition to the cost factor, the formation of a large amount of catalyst fines can lead to the release of dust into the air to an unacceptable level

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