Method for producing hydrogenation catalyst with fluidized bed

Abstract

The invention discloses a preparation method for fluidized bed hydrotreating catalysts, which is characterized in that alumina fiber is also added with the content of 3wt% to 10wt% in the catalyst besides the conventional hydrogenated catalyst component in the catalyst. The invention has the advantages that alumina fiber is added to increase mechanical strength of the catalyst; service life of thecatalyst is prolonged, and production cost is reduced; the complete mixing kneading method is adopted in the preparation method, wherein the hydrogenated active metallic ions are added into the catalyst in the mode of solution ions rather than granular metal salts, thus the metallic ions are dispersed more evenly, and mechanical strength of the catalyst is enhanced; and the acidic adhesive in themethod is added after the mixture of refractory porous inorganic oxide and alumina fiber is wetted by the active metallic solution, thus strong interaction of acid and refractory porous inorganic oxide as well as alumina fiber is greatly mitigated, and loss of pore volume and specific surface area is reduced.

Description

technical field [0001] The invention relates to a preparation method of an ebullating bed hydrogenation treatment catalyst, in particular to a preparation method of an ebullation bed hydrogenation treatment catalyst used for the stable hydrogenation of heavy oil products. Background technique [0002] The catalytic hydrogenation process usually used for heavy oil products is mainly a fixed bed hydrogenation process. Fixed bed reactors are especially suitable for handling lighter and cleaner feeds, such as naphtha, middle distillates, gas oils and ordinary residues. The fixed bed reactor is characterized by smoother operation and easier control. There are the following problems in the hydrotreating of heavy oil products using the fixed bed process: the catalytic reaction conditions will be relatively harsh because the heavy oil products are heavy and contain more mechanical impurities; high-nitrogen raw materials will accelerate catalyst deactivation Very short, the product...

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Problems solved by technology

There are the following problems in the hydrotreating of heavy oil products using the fixed bed process: the catalytic reaction conditions will be relatively harsh because the heavy oil products are heavy and contain more mechanical impurities; high-nitrogen raw materials will accelerate catalyst deactivation Very short, the product properties cannot be guaranteed; the pressure drop of the catalyst bed is high; in order to meet the product index, the fixed bed reactor system needs to adopt a more complicated design, which will increase the investment cost

The pore volume and specific surface area of ​​the catalyst obtained in this patent are large, but the alkaline solution containing VIB metal added in the preparation process contains ammonia, which will cause ammonia and nitrogen pollution to the operating conditions

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