Hydrocracking catalyst containing Y molecular sieve and preparation method thereof

Abstract

The invention discloses a hydrocracking catalyst for producing heavy naphtha in great abundance and a preparation method thereof. The catalyst contains hydrogenation active metals and a carrier which consists of modified Y molecular sieves and alumina, wherein the Y molecular sieves are obtained by using a mixed aqueous solution of aluminum salts and an acid to perform hydro-thermal treatment. The properties of the modified Y molecular sieves are as follows: the specific surface area is between 750 m<2> / g and 850 m<2> / g; the total pore volume is between 0.35 and 0.48 ml / g; the relative crystallinity is between 90 and 130 percent; the cell parameter is between 2.437 and 2.445 nanometers; the silicon-aluminum mol ratio is between 15 and 70; the infrared acid amount is between 0.5 and 1.0 mmol / g; the B acid / L acid is more than 7.0; and the content of sodium oxide is less than or equal to 0.05 weight percent. The hydrocracking catalyst has the characteristics of good catalytic activity, high heavy naphtha selectivity, high yield, high latent content of heavy naphtha arene, and so on.

Description

Technical field [0001] The invention involves a hydrogen cracking catalyst and its preparation method of hydrogenation catalysts and its preparation methods, especially the multi -produced catalytic reorganization raw materials (heavy stone brain oil). Background technique [0002] With the rapid development of my country's national economy, the demand for the market for various types of chemical raw materials, especially aromatics, raw materials, will continue to grow for a longer period of time. The demand for heavy stone brain oil that can be catalyzed as a catalytic reorganization material has also increased significantly.As one of the main means of heavy oil lightweight, hydrogenation technology is the most suitable oil refining technology for rational use of limited oil resources and increasing high -quality heavy stone brain oil.Hydrogenation catalyst is the core of hydrogenation technology, which requires the development of stronger hydrogenation catalysts to meet the nee...

AI Technical Summary

Problems solved by technology

Using aluminum salt alone can also partially remove the non-framework aluminum formed after hydrothermal treatment, but because the pH value of the aluminum salt solution is generally between 2 and 3, it is not enough to remove a large amount of non-framework aluminum, so that part of the aluminum in the micropores The difficult-to-remove non-skeleton aluminum remains in the molecular sieve, which causes partial acid centers of the molecular sieve to be masked, and also affects the distribution of B acid and L acid, making it difficult to maximize the cracking performance of the molecular sieve