Preparation method of hydrogenation catalyst composition containing molecular sieves and amorphous silica-alumina

Abstract

The invention discloses a preparation method of a hydrogenation catalyst composition containing molecular sieves and amorphous silica-alumina. The method comprises the following steps: adding a mixture of the molecular sieves and organic amines as well as organic alcohols and / or organic acids before or in the process of preparing an amorphous silica-alumina-hydrogenation active metal oxide composite oxide by a coprecipitation method; carrying out aging after gel forming is completed and then carrying out hydrothermal treatment, filtration, washing and drying; then carrying out forming, drying and roasting, thus obtaining the hydrogenation catalyst composition. A catalyst prepared by the method can organically combine the molecular sieves and amorphous silica-alumina together with good combination degree and dispersion degree, agglomeration and even blockage of the molecular sieves and amorphous silica-alumina can be avoided, simultaneously control the distribution of hydrogenation components on various acidic components effectively and improve the usability of the catalyst. The hydrogenation catalyst composition prepared by the method is especially suitable for hydrogenation catalysts with relatively high requirements for acidity and relatively low requirements for hydrogenation properties.

Description

Technical field [0001] The present invention involves a preparation method of a hydrogenation catalyst composition, especially for preparation methods for hydrogenation catalyst compositions containing molecular sieves and non -fixed silica aluminum aluminum. Background technique [0002] Hydrogenation technology is one of the important means of secondary processing of crude oil and light oil.Because it has the characteristics of strong raw materials, flexible production operations and product solutions, and good product quality, it has become an important way to produce high -quality lightweight clean oil products and solve the source of chemical raw materials. [0003] The hydrogenation catalyst is generally a dual -function catalyst. The cracking activity and hydrogenation activity are provided by the acidic components and the hydrogenation activity component in the catalyst. [0004] The acid components in the catalyst are generally provided by the molecular sieve contained i...

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