Catalytic cracking catalyst

Abstract

This invention discloses a cracking catalyst, which comprises an appropriate amount of molecular sieve, and aluminum oxide containing 0.5-40 wt. % of additive. The cracking catalyst is prepared by: (1) mixing pseudoboehmite, water and acid by stirring to obtain mixed slurry; (2) aging the mixed slurry at room temperature to 90 deg.C for 0-24 h; (3) mixing the product of step 2 with the additive; (4) mixing the product of step 3 with the molecular sieve, drying and torrefying. The weight ratio of the acid to aluminum oxide in pseudoboehmite is 0.01-0.5. The cracking catalyst has better heavy oil reforming performance.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst. Background technique [0002] Catalytic cracking is the most widely used and effective method in the existing petroleum processing technology. Among them, by adjusting the composition of the catalytic cracking catalyst, the performance of the catalytic cracking catalyst can be changed, thereby improving the distribution, composition and product properties of the cracked product, and affecting the yield of dry gas and catalyst coke. [0003] US 4283309 discloses a hydrocarbon conversion catalyst comprising (1) a crystalline aluminosilicate zeolite, (2) a catalytically active inorganic oxide colloid, (3) a 2 / g, pore size 90-200 angstroms, the pore volume is at least 0.2cm 2 / g of porous inorganic oxides, the catalyst has a pore volume of at least 0.4 cm with a pore diameter of 90-200 angstroms 2 / g. The porous inorganic oxide is alumina. [0004] The prior art shows tha...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new catalytic cracking catalyst with better performance in view of the shortcomings of existing alumina-containing catalytic cracking catalysts, which have poor heavy oil cracking performance, light oil yield and coke resistance.