Hydrotreating catalyst and preparation method thereof

Abstract

The invention discloses a hydrotreating catalyst and a preparation method thereof. The hydrotreating catalyst comprises an alumina carrier and active metal components, wherein the active metal components are loaded onto the carrier by utilizing a traditional immersion method, and when the active metal components are loaded onto the surface of the carrier uniformly, and active metal micelles prepared by a super-solubility micelle method are partially introduced into the carrier, thus clubbed oxides are reserved in the large pore paths (especially channels with diameters over 60 nm) of the alumina carrier. The broad spaces of the large pore paths are fully utilized, therefore the catalyst have a significantly improved capacity of removing metallic impurities from residual oil.

Description

technical field [0001] The invention relates to a hydrogenation treatment catalyst and a preparation method thereof, in particular to a hydrogenation treatment catalyst used for residual oil and other macromolecule-containing reactants or products and a preparation method thereof. Background technique [0002] So far, the catalyst carrier used in the fixed bed of residual oil is still the classic alumina carrier. High temperature calcination method, pH value swing method and water vapor treatment can all obtain macroporous alumina suitable for residual oil, the pore volume of which is concentrated at 8-15nm can reach more than 80%, and the catalyst has high initial activity. The pores of macroporous alumina are continuous through the residual oil molecules, but the pores are too concentrated at about 10nm-20nm, which is not conducive to the long-term operation of the catalyst. The blockage of the catalyst bed causes the shutdown of the device and the replacement of the cata...

AI Technical Summary

Problems solved by technology

The carrier alumina used is formed by kneading alumina scraps and aluminum hydroxide dry rubber powder. Although the alumina carrier obtained by this method has some large pores, the large pores have two disadvantages. One is that the large pores cannot Second, the active metal in the macropore can only be on the pore wall

The large pores of the residual oil catalyst, especially the too many micron-sized pores are conducive to the diffusion of reactants, but from another perspective, too large pores and low space utilization are not conducive to the reaction, and the removal rate of impurities is low

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