Catalytic cracking catalyst capable of increasing yield of gasoline and preparation method thereof

Abstract

The invention provides a catalytic cracking catalyst capable of increasing the yield of gasoline and a preparation method thereof. The catalytic cracking catalyst for increasing the yield of the gasoline is prepared from 50 to 80 parts of a matrix and 20 to 50 parts of a molecular sieve, wherein the content of the matrix is preferably 60 to 75 parts, and the content of a rare earth-containing medium and large porous silicon aluminum material in the matrix is 1 to 20 parts and is preferably 2 to 12 parts; the content of the molecular sieve is preferably 25 to 40 parts, the molecular sieve comprises two Y-shaped molecular sieves which are respectively an REY molecular sieve of which the rare earth content is 8 to 18 percent and an RDSY molecular sieve of which the rare earth content is 1 to3 percent, and a ratio of the REY molecular sieve to the RDSY molecular sieve is 1:3 to 2:1. The catalytic cracking catalyst provided by the invention has higher heavy oil conversion ability and higher gasoline yield.

Description

technical field [0001] The invention relates to a preparation method of a catalytic cracking catalyst, in particular to a catalytic cracking catalyst for improving gasoline yield and a preparation method thereof. Background technique [0002] Gasoline is one of the most used light petroleum products. Catalytic cracking is the main production device of gasoline. About 75% of gasoline in my country is catalytic gasoline. Catalytic cracking is a catalytic process, and the catalyst plays a central role in FCC. The difference in its physical and chemical properties and acid distribution will affect the conversion rate of raw materials and product selectivity. [0003] Al-Khattaf studies (Applied Catalysis A: General 231 (2002) 293–306) show that when the conversion is fixed, the gasoline yield increases gradually with the decrease of the unit cell size of the Y-type zeolite. Al-Khattaf found (Ind. Eng. Chem. Res. 1999, 38, 1350-1356) that under the same conversion rate, the use ...

AI Technical Summary

Problems solved by technology

[0015] There is still a problem of high cost in the preparation of the existing amorphous silicon-aluminum materials, such as the use of organosilicon-aluminum compounds such as tetraethyl orthosilicate and aluminum isopropoxide as the source of silicon-aluminum

At the same time, the existing amorphous silicon-alumina materials still have problems such as small pore volume, low pore diameter, and small B / L acid ratio.

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