Magnesium-aluminum sol and its preparation method and application, catalytic cracking catalyst and its preparation method

Abstract

The invention relates to the field of magnesium-aluminium sol for a catalytic cracking catalyst and discloses magnesium-aluminium sol, a preparation method and application thereof, a catalytic cracking catalyst and a preparation method thereof. Molar ratio of Mg: Al in the magnesium-aluminium sol is (1.5-6): (1-2), preferably (4-6): 1. Molar ratio of Al: Cl in the magnesium-aluminium sol is (1-1.5): 1. When the magnesium-aluminium sol provided by the invention is used as a binder for a catalytic cracking catalyst, particle structure of the binder can be enhanced, bonding performance of the binder can be improved, blocking of the molecular sieve structure of an active ingredient in the catalyst by the binder is reduced, influence of the binder on activity of the catalyst is decreased, application amount of a molecular sieve in the catalyst can be reduced, and cost of the catalyst is lowered.

Description

technical field [0001] The invention relates to the field of magnesium-aluminum sol for catalytic cracking catalyst, in particular to a magnesium-aluminum sol, a preparation method of the magnesium-aluminum sol and application in the preparation of a catalytic cracking catalyst, and a magnesium-aluminum sol containing the magnesium-aluminum sol as a binder Catalytic cracking catalyst and preparation method thereof. Background technique [0002] The fluid catalytic cracking process is the most important means of secondary processing of crude oil. With the deepening of the heavier and inferior quality of the FCC feed, the content of the active component molecular sieve in the catalyst has increased from 15-20% in the early stage to the present. 35% or even more than 40%. With the increase of molecular sieve content, the wear index and sphericity of the catalyst have become a very important problem in the catalyst preparation process. The catalyst must meet certain strength r...

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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.

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