Hydrogenation catalyst containing molecular sieves and amorphous silica-alumina

Abstract

The invention discloses a hydrogenation catalyst containing molecular sieves and amorphous silica-alumina. The hydrogenation catalyst comprises hydrogenation active metal components, the molecular sieves and amorphous silica-alumina, wherein the hydrogenation active metals are group VIII metals and group VIB metals; the group VIII metal components are mainly loaded on the molecular sieves; the group VIB metal components are mainly loaded on amorphous silica-alumina; the molecular sieves are coated with amorphous silica-alumina; the group VIII metals account for 1-12% of the molecular sieves by weight in terms of oxide; the group VIB metals account for 2-40% of amorphous silica-alumina by weight in terms of oxide; the weight ratio of the molecular sieves to amorphous silica-alumina is (1:19)-(19:1). The hydrogenation catalyst has the beneficial effects that the hydrogenation catalyst fully isolates the main hydrogenation active metals from the acid centers of the molecular sieves and adjusts the hydrogenation and acid functions; the acid cracking components of the molecular sieves give full play so that reactants carry out cracking reaction as much as possible before coming into contact with the hydrogenation active centers; 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 hydrogenation catalyst and its method, in particular to a hydrogenation catalyst containing molecular sieve and amorphous silicon aluminum and its preparation method. 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 / o...

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