Composite mesoporous molecular sieve hydrocracking catalyst and uses thereof

Abstract

The invention relates to a composite mesoporous molecular sieve hydrocracking catalyst and the application thereof. The catalyst composed of following components of 20 to 50 percent of amorphous silica-alumina, 5 to 30 percent of alumina, 10 to 25 percent of adhesives, 10 to 40 percent of Group VIB-the metal oxides, 1 to 20 percent of Group VIII-the metal oxides, 0.1 to 10 percent of Group VA-the metal oxides, and 1 to 40 percent of composite mesoporous molecular sieve, wherein, the composite mesoporous molecular sieve is a composite molecular sieve composed of a mesoporous molecular sieve AlSBA-15 and/or AlSBA-15/Y; the weight ratio of the composite molecular sieve AlSBA-15/Y in the AlSBA-15 and a Y molecular sieve is 9:1 to 1:9; the weight ratio of the mesoporous molecular sieve and a pore molecular sieve is 3:1 to 1:3, the silica alumina ratio is 10:1 to 40:1, and the silica alumina ratio of the Y molecular sieve is 5:1to 20 :1. The catalyst used for hydrocracking for heavy oil shows high activity for hydrocracking and high medium oil selectivity.

Description

technical field [0001] The invention relates to a composite mesoporous molecular sieve hydrocracking catalyst and its application. Background technique [0002] In recent years, with the heavy and inferior quality of crude oil in the world, the hydrocracking process with strong adaptability to raw materials and good product quality has become one of the important means of lightening heavy oil. At the same time, worldwide demand for middle distillates continues to grow, and refineries are under increasing pressure to produce high-quality middle distillate products. Therefore, the medium oil hydrocracking process capable of producing high-quality clean fuels has been more and more widely used. As the core of hydrocracking technology, the development of CNPC hydrocracking catalyst is the key to the production of clean fuels. [0003] The hydrocracking catalyst is a dual-functional catalyst with hydrogenation and cracking functions, and is generally made of non-precious metals...

AI Technical Summary

Problems solved by technology

[0008] CN1393521A discloses medium oil type hydrocracking catalyst with amorphous silicon aluminum, gamma and β compound molecular sieve as carrier, and the acidity of β molecular sieve is high, which is unfavorable for the improvement of medium oil selectivity, medium oil selectivity is 66%~69%, medium oil selectivity Relatively low

The initial reaction temperature of the catalyst is 404°C-406°C, the selectivity of medium oil is 78%-79%, and the cracking activity of the catalyst is low