Preparation of bubbling bed hydrotreating catalyst

Abstract

The invention discloses a preparation method of a boiling bed hydrotreatment catalyst. During the preparation method of the catalyst, alumina fibers and aluminum dihydrogen phosphate are added, thus improving the mechanical intensity of the catalyst, improving the service life of the catalyst and reducing the product cost. In the method, the aluminum dihydrogen phosphate with better acidity is preferably added into a bond, thus being capable of easing the strong mutual effects between an acid and a refractory porous inorganic oxide as well as the alumina fibers and reducing the loss of pore volumes and specific surface area. Besides, as the aluminum dihydrogen phosphate contains 6 hydroxide radicals, the aluminum dihydrogen phosphate is easy to form a complex compound with metals and is beneficial to improving the mutual effect between a carrier and active metals, thereby improving the activity of the catalyst.

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 VI B metal added in the preparation process contains ammonia, which will cause ammonia and nitrogen pollution to the operating conditions

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