Residue oil hydrogenation catalyst and preparation method thereof

Abstract

The invention discloses a residue oil hydrogenation catalyst and a preparation method thereof, wherein the preparation method comprises: (1) carrying out spray impregnating on a residue oil hydrodemetallization catalyst carrier with an organic solvent containing a Span surfactant, and drying; and (2) impregnating the dried carrier with an active metal solution containing polyacrylate radicals, drying, and calcining to obtain the catalyst. According to the present invention, the residue oil hydrogenation catalyst prepared by the method has advantages of high metal utilization rate, high metal dispersion degree, high activity and the like.

Description

technical field [0001] The invention relates to a residual oil hydrogenation catalyst and its preparation, in particular to a residue oil hydrogenation catalyst with high metal dispersion and high activity and its preparation. Background technique [0002] With the increasingly heavy and inferior crude oil at home and abroad, residual oil hydrotreating technology has been increasingly widely used. At present, the industrially used residual oil hydrotreating catalysts usually use alumina or alumina containing a small amount of additives as the carrier, and the metal elements of Group VIII and Group VIB as active components. In the preparation process of residual oil hydrogenation catalyst, it is generally prepared by impregnating the aqueous solution of metal compound one or more times through the carrier, and then drying and roasting. This catalyst preparation method is described in EP0469675, etc., for example. [0003] During the catalyst impregnation process, the pores o...

AI Technical Summary

Problems solved by technology

[0005] The bulk phase hydrogenation catalyst disclosed by CN102049265A adds ammonium bicarbonate during the co-precipitation process, and the bulk phase hydrogenation catalyst disclosed by CN102451703A adds carbon dioxide during the co-precipitation process to generate carbonate or bicarbonate. It releases a certain amount of gas during the roasting process. Under the impact of the gas, the pore volume and specific surface area of ​​the catalyst are increased, so that more metal active sites are exposed on the surface of the catalyst, but this method will cause some pores to collapse. , the pore distribution is dispersed, and the mechanical strength is reduced

This method is mainly to achieve uniform dispersion of active metals, but uniformly dispersed active metals cannot achieve a high number of stacked layers, which is quite different from the formation of highly active hydrogenation active centers

Images