A kind of residual oil hydrogenation catalyst and its preparation

Abstract

The invention discloses a residual oil hydrogenation catalyst and its preparation. The preparation comprises the following steps: (1) spraying and immersing the residue oil hydrogenation demetallization catalyst carrier with an organic solvent containing Spann surfactant, and then drying; (2) ) impregnating the dried carrier in step (1) with an active metal solution containing polyacrylate, then drying and calcining to obtain a catalyst. The residual oil hydrogenation catalyst prepared by the method has the advantages of high active metal utilization rate, high metal dispersion, 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...

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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

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