Preparation method for granular hydrogenation catalyst

Abstract

The invention discloses a preparation method for a granular hydrogenation catalyst. The method comprises the following steps of: preparing aluminum hydroxide colloid at a relatively low temperature by adopting pH value oscillation colloid formation, adding an ammonia solution containing Mo and Ni after the low-temperature colloid formation, stabilizing the solution for certain time at a high temperature, filtering, washing, drying, crushing the dried colloid powder into granules, and thus obtaining the granular hydrogenation catalyst by roasting. By the method, the granular hydrogenation catalyst with large aperture, large specific surface area, low abrasion and uniform active metal distribution can be prepared. The hydrogenation catalyst is particularly suitable to be used as a boiling bed residuum hydro-treating catalyst, and can reduce the diffusion limitation of macromolecular compounds such as colloid and bituminous matter and the like in the residuum in the catalyst; the hydrogenation reaction activity of the catalyst can be improved; the catalyst has strong abrasion resistance; the consumption of the catalyst is reduced; and meanwhile, the influence of the catalyst on the downstream reaction or equipment is also reduced.

Description

technical field [0001] The invention relates to a preparation method of a small-particle hydrogenation catalyst, which is particularly suitable for the preparation of a small-particle, low-wear hydrogenation catalyst in the fluidized bed hydrogenation treatment process of heavy oil and residual oil. technical background [0002] Most of the impurities such as sulfur and metals in crude oil are concentrated in the residual oil, and these impurities will pollute the downstream catalysts in the subsequent processing, so these impurities must be removed by hydrotreating first. [0003] Residue hydrotreating processes mainly include fixed bed, moving bed and ebullating bed. The fluidized bed hydrogenation process is one of the effective means for deep processing of heavy oil due to its strong adaptability to raw materials and flexible processing schemes. [0004] In the process of heavy oil ebullating bed hydroprocessing, raw oil and hydrogen flow upward through the catalyst bed...

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Problems solved by technology

[0008] The above methods can prepare low-wear small-particle catalysts or carriers, but special equipment is required for spheroidization, the preparation process is complicated, and the cost of the catalyst is increased. Moreover, the obtained spherical particles have high wear, increase catalyst consumption, and affect downstream reactions or equipment. bring adverse effects