Medium oil type hydrocracking catalyst and preparation method thereof

Abstract

The invention discloses a medium oil type hydrocracking catalyst and a preparation method thereof. The catalyst comprises a carrier and a hydrogenating active component; the carrier comprises a beta molecular sieve, a Y molecular sieve, amorphous silica-alumina and a binder; with the weight of the carrier as a benchmark, the content of the beta molecular sieve is 2-20 wt%, the content of the Y molecular sieve is 10-30 wt%, the content of the amorphous silica-alumina is 20-60 wt%, and the content of the binder is 15-40 wt%; the beta molecular sieve has the following properties: the SiO2 / Al2O3 molar ratio is 60-100, the specific surface area is 505-850 m<2> / g, the pore volume is 0.35-0.60 mL / g, and the relative crystallinity degree is 100%-148%; the relative crystallinity degree of the beta molecular sieve subjected to water steam hydrothermal treatment is more than or equal to 95%. The catalyst has the characteristics of relatively high activity, medium oil selectivity, and high product quality.

Description

technical field

[0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst for producing high-quality middle distillate oil by using beta molecular sieve and Y-type molecular sieve as main cracking components. Background technique

[0002] In view of the current shortage of petroleum resources, increasingly stringent environmental protection requirements, and the structure of petroleum products that do not meet market demand, the application of hydrocracking technology will become an effective technical measure to improve the quality of petroleum products, reduce environmental pollution, and increase market adaptability. It has become the most important process device in a modern refinery. At the same time, the increasingly stringent emission standards for motor fuels have made the problem of directly producing high-quality clean fuels from processing low-quality heavy oils increasingly prominent, and ...