Preparation method of hydrogenation catalyst

Abstract

The invention discloses a method for preparing a hydrogenation catalyst. The method comprises: adding a mixture of molecular sieves containing hydrogenation active metal components and organic amines during the gelling process of amorphous alumina, aging the amorphous alumina after gelling, and then filtering, washing, and drying. After molding, drying and roasting, the hydrogenation catalyst is obtained. The method of the invention can organically combine the molecular sieve and alumina, has a good degree of combination and dispersion, can avoid agglomeration or even blockage between the molecular sieve and amorphous alumina, and can effectively adjust the hydrogenation function and cracking of the catalyst Function, improve the performance of the catalyst. The catalyst prepared by the method of the invention is suitable for shallow cracking and deep hydrogenation processes.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst, in particular to a method for preparing a hydrogenation catalyst containing molecular sieves. Background technique [0002] Hydrocracking technology is one of the important means for the secondary processing of crude oil and the lightening of heavy oil. Because of its strong adaptability to raw materials, flexible production operations and product solutions, and good product quality, it has become an important way to produce high-quality light clean oil products and solve the source of chemical raw materials. [0003] Hydrocracking catalysts are generally dual-functional catalysts, and their cracking activity and hydrogenation activity are respectively provided by the acidic component and hydrogenation active component in the catalyst. [0004] The acidic component of the catalyst is generally provided by molecular sieves contained in the catalyst and / or refractory inorganic oxi...

AI Technical Summary

Problems solved by technology

Among them, the carrier material is prepared by directly adding molecular sieves in the process of forming amorphous silica-alumina. In this way, amorphous silica-alumina is prone to agglomeration, and it is also easy to enter the pores of the other party or block the pores of molecular sieves, which affects the amorphous silica-alumina. The distribution on the molecular sieve, the poor connectivity between the molecular sieve and the amorphous silica-alumina channel, reduces the specific surface area and pore volume of the catalyst, and the distribution of active metals is not easy to control, which makes the hydrogenation function of the catalyst mismatch with the cracking function, affecting the catalyst performance