Hydrogenation catalysts containing molecular sieves and alumina

Abstract

The invention discloses a hydrogenation catalyst containing molecular sieve and aluminum oxide. The composition of the hydrogenation catalyst includes: hydrogenation active metal components, molecular sieves and amorphous alumina, wherein the hydrogenation active metals are Group VIII metals and Group VIB metals, wherein the Group VIII metal components are mainly supported on molecular sieves , Group VIB metal components are mainly supported on amorphous alumina, and amorphous alumina wraps molecular sieves, Group VIII metals account for 1% to 12% of the molecular sieve weight in terms of oxides, and Group VIB metals are calculated in terms of oxides Accounting for 2%~40% of the weight of amorphous alumina, the weight ratio of molecular sieve to amorphous alumina is 1:19~19:1. The hydrogenation catalyst of the present invention fully isolates the main hydrogenation active metal from the acidic center of the molecular sieve, regulates the hydrogenation function and the acidic function, and the acidic cracking component of the molecular sieve fully exerts its effect, so that the reactants can be as fast as possible before contacting the hydrogenation active center. A cleavage reaction may occur. The catalyst is especially suitable for the hydro-upgrading process of hydrocarbons which requires moderate acidity and moderate hydrogenation function.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method thereof, in particular to a hydrogenation catalyst containing molecular sieve and alumina and a preparation method thereof. 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 ...

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