Hydrogenation catalyst carrier and production thereof

Abstract

A carrier of hydrocatalyst for the hydrocracking of heavy oil, hydromodifying of poor diesel oil, etc is prepared from amorphour silicon aluminium, modified beta-molecular sieve and aluminium oxide. Its preparing process is also disclosed. Said catalyst has high catalytic activity.

Description

technical field [0001] The invention relates to a hydrogenation catalyst carrier and a preparation method thereof, in particular to a petroleum fraction hydrogenation catalyst carrier and a preparation method thereof. Background technique [0002] The carrier is an important part of the catalyst, which usually not only provides a dispersion place for the metal active components, but also participates in the reaction itself, and completes the entire catalytic reaction together with other active components. In petroleum distillate hydrogenation catalysts, the carrier containing amorphous silica-alumina and molecular sieve has the above-mentioned dual functions. Therefore, the properties of the catalyst support have an important effect on the final catalyst. Existing hydrogenation catalyst supports generally contain amorphous silica-alumina, molecular sieves, alumina, and other refractory oxides. The hydrogenation catalyst carrier containing amorphous silica-alumina and molec...

AI Technical Summary

Problems solved by technology

Although the activity and medium oil selectivity of this catalyst are significantly improved compared with the previous amorphous silica-alumina catalysts, and it has the characteristics of producing the most low-point diesel oil, but the reaction temperature is still high, and the operation flexibility is poor, which is difficult to meet the production requirements. The manufacturer needs to increase the processing capacity of the device and further increase the production of diesel oil

[0008] Chinese patent ZL 97116403.7 introduces a medium oil type hydrocracking catalyst, with modified β molecular sieve, amorphous silica-alumina and alumina as the carrier, wherein the content of β molecular sieve is relatively high, and the preferred content of β molecular sieve in the catalyst is 10w% to 30w%. In the examples, the content of β molecular sieve is more than 10w%, and it is a β molecular sieve of conventional particle size. The secondary cracking rate is relatively high. Although there is high activity in single-stage hydrocracking, the selectivity of medium oil is low.

Because the silicon-aluminum ratio of the molecular sieve used in the catalyst is too high, the activity of the catalyst is low, and the selectivity of medium oil is not very high.