Teeth spherical heavy oil hydrotreating catalyst and preparation method thereof

Abstract

The invention discloses a dentiform sphere shaped heavy oil hydrotreated catalyst and a preparation method thereof. The catalyst comprises an active composition, an addition agent and a dentiform sphere shaped aluminum oxide carrier, wherein the active composition comprises compounds of cobalt and nickel, and a compound of molybdenum or / and tungsten; the addition agent comprises a compound of phosphor, silicon, boron or halogen or compounds of any two compositions of the phosphor, the silicon, the boron and the halogen; and compositions according to gross weight of the dentiform sphere shapedheavy oil hydrotreated catalyst comprise: 2 to 6 percent of the cobalt compound, 3 to 10 percent of the nickel compound, 0 to 26 percent of the molybdenum compound, 0 to 8 percent of the tungsten compound, and 0.5 to 2 percent of the addition agent. The catalyst has the characteristics of high specific surface area, large pore volume, high strength, proper surface acid content, small bed pressuredrop, low reaction temperature and high activity of hydrodesulfurization and denitrification. The preparation method comprises preparation of a precursor substance of the aluminum oxide carrier, preparation of the dentiform sphere shaped aluminum oxide carrier, preparation of a catalyst steeping fluid and preparation of the catalyst. The preparation process can be mastered and realized simply andeasily.

Description

technical field [0001] The present invention relates to a heavy oil hydrotreating catalyst and a preparation method thereof, in particular to a toothed spherical catalyst for the hydrotreating of heavy oil such as atmospheric residue, vacuum residue, coking wax oil and the like. Preparation method etc. Background technique [0002] With the development of the national economy, people's demand for energy resources is increasing. As one of the important energy resources, petroleum resources, especially light oil resources, are decreasing day by day due to its non-renewable nature. With the reduction of light oil resources, the proportion of heavy oil in world oil production is increasing, and the content of residual oil in heavy oil is as high as 60%. Therefore, the lightening of heavy oil is one of the very important tasks in the current oil refining industry. Among them, the hydrotreating of heavy oil is one of the important means of lightening heavy oil. The so-called hy...

AI Technical Summary

Problems solved by technology

In the prior art, heavy oil hydrotreating catalysts mostly use γ-Al 2 o 3 As a carrier, the shape is cylindrical, clover-shaped, etc., and has defects such as small specific surface area, small pore size, and low strength; when used for heavy oil hydrotreating, there are large bed pressure drop, high reaction temperature, and easy local overheating and coking , poor activity of hydrodesulfurization and hydrodenitrogenation, etc.

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