Adhesive, application of adhesive, catalytic cracking catalyst and preparation method of catalytic cracking catalyst

Abstract

The invention relates to the fields of catalytic cracking catalysts and adhesives, and discloses an adhesive, an application of the adhesive, a catalytic cracking catalyst and a preparation method of the catalytic cracking catalyst. The adhesive contains an alumina sol and a silica sol, wherein the molar ratio of aluminum to chloride in the alumina sol is (1-1.5):1, the corrosion rate is equal to or lower than 1.5g / m<2>*h, the pH value is 2.8 or above, and the viscosity is 500 mPa*s or above. The alumina sol contained in the adhesive provided by the invention has the advantages of few free chloride ions, an optimized structure, high viscosity, low corrosion rate and a high pH value, and can strengthen the structure of adhesive particles, increase the adhesive property of the adhesive, reduce blocking of molecular sieve structures of active components in the catalyst by the adhesive, decrease the influence degree of the adhesive to the catalyst activity, decrease the usage amount of molecular sieves in the catalyst and reduce the costs of the catalyst.

Description

technical field [0001] The invention relates to the field of binders containing aluminum sol, in particular to a binder, the application of the binder of the invention in the preparation of a catalytic cracking catalyst, a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] Fluid catalytic cracking technology is the most important means of secondary processing of crude oil. With the deepening of the heavy and inferior quality of FCC feed, the content of active component molecular sieve in the catalyst has increased from 15-20% in the early stage to the present 35% or even 40% of the above. With the increase of molecular sieve content, the wear index and sphericity of the catalyst have become a very important issue in the catalyst preparation process. The catalyst must meet a certain strength requirement and at the same time, the catalyst forms microsphere particles with a particle size of 20-150 microns and an average particle size of...

AI Technical Summary

Problems solved by technology

The purpose of spray drying is to evaporate excess water in the slurry at a certain temperature. When the solid content is low, more water needs to be evaporated, and the residence time of the material in the drying tower is the same, so more evaporation heat or high drying temperature is required. Moisture escapes from the inner surface of the rapid type particles at high temperature to form hollow spheres or microspheres with apple stalks. On the one hand, the strength of the catalyst will deteriorate, and on the other hand, it will be easily broken when fluidized in the FCC reverse system.

Images