High-silicon rare earth Y type zeolite of small crystal grains with gas phase ultra-stabilization, catalytic cracking catalyst as well as preparation method thereof and catalytic cracking method

Abstract

The invention relates to high-silicon rare earth Y type zeolite of small crystal grains with gas phase ultra-stabilization, a catalytic cracking catalyst as well as a preparation method and a catalytic cracking method. The crystal grain average diameter of the high-silicon rare earth Y type zeolite of small crystal grains with gas phase ultra-stabilization is 0.1-0.8 micrometer, lattice constant is 24.5-24.6 angstrom, and silica-alumina ratio is 7-10; the total weight of the zeolite is used as a reference, wherein the content of rare earth oxide is 6-16 wt.%, and the content of sodium oxide is lower than 2 wt.%; the zeolite is prepared by gas phase ultra-stabilization treatment, washing and rare earth ion exchange in order from Y type zeolite of small crystal grains. The catalytic cracking catalyst containing the zeolite has good stability, coke after catalytic cracking has good selectivity, and obtained gasoline product has extremely high gasoline octane number and good quality.

Description

technical field [0001] The invention relates to a small-grain gas-phase high-silicon rare earth Y-type zeolite, a catalytic cracking catalyst containing the zeolite and a preparation method thereof, and a method for catalytic cracking of heavy oil by the catalytic cracking catalyst. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components react in the presence of catalysts to convert them into high value-added products such as liquefied gas, gasoline, and diesel. The performance of the catalyst in the catalytic cracking process determines the distribution of catalytic cracking products and the economic benefit of the catalytic unit. Due to the depletion of petroleum resources and the large demand for light oil products in the market, it is very ...

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Problems solved by technology

[0016] The purpose of the present invention is in order to solve the problem that existing catalytic cracking catalyst stability is poor, carries out catalytic cracking reaction coke selectivity difference and the gasoline octane number product (being the product of octane number and gasoline yield) of the gasoline product that obtains is low, provides Disclosed are small-grain gas-phase ultra-stable high-silicon rare earth Y-type zeolite, catalytic cracking catalyst, preparation method thereof, and catalytic cracking method

Among them, the octane number of catalytic cracking gasoline is directly related to the quality and price of gasoline. Generally, the increase of gasoline production by catalytic cracking faces the problem of a decrease in gasoline octane number, and the problem of gasoline yield decline when increasing the gasoline octane number

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