Preparation method of hydrocarbon hydrogenation catalyst

Abstract

The invention discloses a preparation method of a hydrocarbon hydrogenation catalyst. The method comprises the following steps: adding a mixture of group VIII metal cation modified molecular sieves and organic amines as well as organic alcohols and / or organic acids before or in the process of preparing an alumina-group VIB metal oxide composite oxide by a coprecipitation method; carrying out aging after gel forming is completed and then obtaining a catalyst intermediate through filtration, washing and drying; then carrying out forming, drying and roasting, thus obtaining the hydrogenation catalyst. The catalyst prepared by the method can organically combine the molecular sieves and alumina together with good combination degree and dispersion degree, thereby avoiding agglomeration and even blockage of the molecular sieves and amorphous alumina, simultaneously controlling the distribution of hydrogenation components on various acidic components effectively and improving the usability of the catalyst; and the catalyst is especially suitable for the hydrocarbon hydro-upgrading process with moderate requirements for acidity and the hydrogenation function.

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