Bubbling bed hydrotreating catalyst and preparation thereof

Abstract

The invention discloses a boiling bed hydrotreatment catalyst and a preparation method thereof. The catalyst adopts an alumina carrier which contains alumina fibers and an accessory ingredient of phosphorus; wherein, the accessory ingredient of phosphorus is partially or completely led in the form of aluminum dihydrogen phosphate. During the preparation process, the alumina fibers and the aluminum dihydrogen phosphate are added in the catalyst, thus being capable of improving the mechanical intensity and the wear resistance of the catalyst, improving the stability of the catalyst, prolonging the service life of the catalyst and reducing the product cost. When the catalyst is used for the heavy oil products of boiling bed hydrotreatment, the impure atoms like nitrogen, sulfur in the oil products can be removed to the largest extent, the contents of olefin and aromatic hydrocarbon can be reduced and the product stability can be improved.

Description

technical field [0001] The invention relates to a fluidized bed hydrogenation treatment catalyst and a preparation method thereof, in particular to a fluidized bed hydrogenation treatment catalyst suitable for hydrogenation of heavy distillate oil and a preparation method thereof. Background technique [0002] Since the sulfur and nitrogen content in heavy distillate oil is generally above 0.5wt%, and it also contains a certain amount of oxygen and more mechanical impurities, if it is not pretreated in time, it is very easy to generate substances that are not conducive to subsequent transportation and processing, so it is necessary to The heavy distillate oil is pretreated by hydrogenation to remove nitrogen, sulfur, oxygen and other heteroatoms to the greatest extent, and improve the stability of the heavy distillate oil. [0003] The process usually used for catalytic hydrogenation of heavy distillate oil is mainly fixed bed hydrogenation process. Fixed bed reactors are e...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the hydrotreating of heavy distillate oil using the fixed bed process: because the heavy distillate oil is heavy and contains more mechanical impurities, the catalytic reaction conditions will be relatively harsh; high-nitrogen feedstock will accelerate catalyst deactivation, and the use of catalyst The cycle is very short, and 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 increases the investment cost

Due to the large pore structure of the catalyst and no method for increasing the strength of the catalyst, the strength and wear resistance of the catalyst still need to be further improved.

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