Ultra-deep hydrogen desulfurization multi-metal body catalyst with a stratified structure as well as preparation method and application thereof

Abstract

The invention relates to an ultra-deep hydrogen desulfurization multi-metal body catalyst with a stratified structure. In the ultra-deep hydrogen desulfurization multi-metal body catalyst, metals include at last one VIII-group metal, at least one <+2>-valence metal and at least two VIB-group metals. The catalyst is characterized in that, counted by oxides and based on the catalyst, the catalyst comprises the following components by weight percent: 1%-50% of VIII-group metal, 1%-50% of <+2>-valence metals and 5%-60% of two VIB-group metals. The invention further discloses a preparation method and application of the catalyst. The catalyst is applied to the hydrogen desulfurization of diesel distillate containing 4,6-dimethyldibenzothiophene and expresses an ultra-high hydrogen desulfurization activity. According to the catalyst, the ultra-deep desulfurization is realized and the cost of the body catalyst is lowered.

Description

technical field [0001] The invention relates to a multi-metal bulk catalyst for ultra-deep hydrodesulfurization with a layered structure. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the application of the above-mentioned catalyst in ultra-deep hydrodesulfurization reaction of sulfur-containing compounds. Background technique [0004] Due to the decline of oil reserves, the problem of heavy and inferior oil has become more and more prominent. The high-sulfur crude oil in the world is increasing year by year, and the environmental legislation of various countries has increasingly stringent requirements for limiting the sulfur content in fuel oil. Therefore, the development of ultra-deep processing oil with excellent performance Hydrogen desulfurization catalysts have not only become the core of the field of hydrodesulfurization, but also make hydroprocessing technology more and more...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of synthetic method is that the strong ammonia water is used in the synthetic process, which will pollute the environment.

Since the raw material used in this patent is basic nickel carbonate, which is insoluble in water, the essential reaction of the synthesis process is the replacement reaction between ions and solids, so it is difficult to synthesize catalyst particles with small grains

Chinese patents CN101544904A, CN101153228A, and CN101733120A also disclose a preparation method of a NiMoW three-metal bulk catalyst and its application in ultra-deep desulfurization of diesel oil; although the prepared catalyst shows relatively high activity in ultra-deep desulfurization of diesel oil, the catalyst The specific surface area and pore volume are still small

[0011] (1) The raw materials used are not environmentally friendly;

[0012] (2) catalyst preparation cost is higher;

[0013] (3) The specific surface area, pore volume and activity of the catalyst need to be further improved

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