Preparation method of catalytic cracking catalyst

Abstract

A preparation method of a catalytic cracking catalyst includes the following steps: 1) moulding of a catalyst: mixing and pulping water, a binding agent, clay and a molecular sieve and spray-drying and roasting the mixture to mould catalyst solid granules; 2) acidic modification: adding water to the catalyst solid granules, adding an acidic substance until the pH value is 2.5-5.5, and stirring the mixture for 30-180 min; 3) modification with a modifier; adding a weak-alkaline medium modifier to the catalyst slurry to enable the pH value to be 6.0-9.0; and 4) filtering and drying the modified catalyst slurry, and roasting a product at 300-800 DEG C for 10-180 min. The catalyst has high pore volume and reaction performance, is improved in strength and is prolonged in service life.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalytic cracking catalyst. Background technique [0002] Fluid Catalytic Cracking (FCC for short) process is the main process of secondary processing of crude oil, and an important means of deep processing of heavy oil at home and abroad to produce vehicle fuel. With the increasing quality and inferiority of processed raw materials, FCC catalysts are required to have gradient pore structure and acidic characteristics. The catalyst prepared by the existing technology must sacrifice the strength of the catalyst when increasing the pore volume, which cannot meet the application requirements. Therefore, it is of great significance to develop a new FCC catalyst preparation technology to improve the strength of the catalyst and prolong the service life of the catalyst under the premise of ensuring the pore volume and reaction performance of the catalyst...

AI Technical Summary

Problems solved by technology

The problem existing in the preparation process of the catalyst prepared according to the existing process or the improved process is that the strength of the catalyst cannot be guaranteed when the catalyst has large pores, resulting in a large unit consumption of the catalyst, which increases the production cost of the refinery; or the preparation process is complicated, and High cost, difficult to use in industry

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