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 relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst for prolific catalytic reforming raw material (heavy naphtha) and a preparation method thereof. Background technique

[0002] With the rapid development of my country's national economy, the market demand for various chemical raw materials, especially aromatic hydrocarbon raw materials, will continue to grow for a long period of time now and in the future. The catalytic reforming technology for the production of aromatic hydrocarbon raw materials is developing rapidly, which makes Demand for heavy naphtha, which can be used as a feedstock for catalytic reforming, has also increased significantly. As one of the main means of lightening heavy oil, hydrocracking technology is the most suitable refining technology to rationally utilize limited petroleum resources and increase the production of high-quality heavy naphtha. Hydrocracki...

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