Method for preparing hydrocracking catalyst

Abstract

The invention discloses a method for preparing a hydrocracking catalyst. In the catalyst, amorphous silicon aluminum and aluminum oxide are taken as a carrier, group VIII and VIB metal is taken as a hydrogenation active ingredient, and the catalyst contains an active substance B2O3 preferably. The catalyst is prepared by mixing and forming the amorphous silicon aluminum and the aluminum oxide, drying, loading active metal by an impregnation method, drying and roasting. Compared with the conventional impregnation method, the method has the advantages that: the formed catalyst is not roasted, so that the preparation process is simplified, time and energy are saved, strong interaction between the active metal and the carrier is reduced, the metal is uniformly distributed, the activity of themetal is more easily exerted, and the specific surface area is prevented from being lost due to multi-step roasting. The catalyst prepared by the method is particularly suitable for the processes of hydrocracking distillate oil and hydrogenating productive middle distillate oil, and has high activity and middle distillate oil selectivity.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a medium oil type hydrocracking catalyst containing amorphous silicon aluminum 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 promulgate...

AI Technical Summary

Problems solved by technology

Although the catalyst has been treated with amorphous silica-alumina in the preparation process, which is beneficial to improve the catalytic activity, the high-temperature hydrothermal treatment causes the catalyst to lose a large amount of surface area, and the catalyst activity is still not very high.

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