Hydrocracking catalyst and preparation method thereof

Abstract

The present invention discloses a hydrocracking catalyst and a preparation method thereof. The catalyst comprises hydrogenation active metals and a carrier containing modified Y molecular sieve, alumina and amorphous aluminium silicon, wherein, the Y molecular sieve is prepared by the following method: the Y molecular sieve undergone hydro-thermal treatment by mixed water solution of aluminium salt and acid is adopted; the performance of the Y molecular sieve is as follows: specific surface is 800m<2> / g-900m<2> / g, total aperture volume is 0.40ml / g-0.50ml / g, relative crystallinity is 90%-130%, cell parameter is 2.434-2.440nm, aluminium silicon mol ratio is 20-100, infrared acid volume is 0.3-0.8mmol / g, the mol ratio of acid B and acid L is above 7.0, sodium oxide content is less than or equal to 0.05wt%. The catalyst prepared by the invention has the advantages of high catalytic activity, good target product selectivity and can produce heavy naphtha, aviation fuel and diesel fuel, and the like, with high yield and good quality.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst capable of producing heavy naphtha, jet fuel and diesel oil and a preparation method thereof. Background technique [0002] The main features of hydrocracking technology are strong adaptability of raw materials, flexible product schemes, high selectivity of target products, good product quality and high added value, etc., and can directly produce a variety of high-quality petroleum products (such as gasoline, jet fuel, diesel oil, lubricating oil, etc.) Base oil, etc.) and high-quality chemical raw materials (such as raw materials for the production of benzene, toluene, xylene, ethylene, etc.). Therefore, as the quality of crude oil deteriorates year by year, the market demand for high-quality petroleum products and high-quality chemical raw materials continues to grow, and new environmental protection regulations have been prom...

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