Preparation process of hydroprocessing catalyst

Abstract

The invention relates to a preparation method of a hydrocarbon hydrogenation treatment catalyst. The catalyst uses γ-Al2O3 as a carrier, VIB and VIII metals as active components, and Ti as active auxiliary agents. The catalyst promoter Ti of the present invention is introduced in the process of producing aluminum hydroxide by the carbonization method by adopting the pH swing method. The preparation method of the catalyst is a complete mixing and kneading method, that is, the aluminum hydroxide dry rubber powder introduced into Ti by adding a titanium salt solution is first added to an alkaline solution containing Mo and / or W, and fully kneaded until the aluminum hydroxide powder is completely mixed. Wet by alkaline solution, then add acidic solution containing Co and / or Ni, knead until the material becomes plastic, extrude, dry and roast to obtain the catalyst. The distribution of the catalyst auxiliary agent Ti prepared by the method of the invention is more uniform, and the performance of the catalyst is obviously improved.

Description

technical field [0001] The invention relates to a preparation method of a heavy hydrocarbon hydrotreating catalyst, in particular to a preparation method of a heavy and residual oil hydrodesulfurization catalyst. Background technique [0002] In recent years, the hydrotreating process of residual oil has been paid attention to by people. With the need for deep processing of residual oil and the higher and higher requirements for environmental protection, more extensive and in-depth research must be carried out on catalysts for residual oil hydrotreating in order to continuously develop new catalysts to meet actual needs. [0003] It is well known that the physical and chemical properties of catalysts, such as most probable pore size, surface area, and average pore size, play an important role in the activity and stability of catalysts. For heavy distillate oil, especially residual oil, the content of metal impurities (such as Ni, V, etc.) is high. If the pore size of the c...

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Problems solved by technology

Its disadvantage is that due to the strong acidity of titanium tetrachloride solution, it has a certain destructive effect on the structure of alumina.

The titanium-containing aluminum hydroxide obtained by this method has a relatively uniform distribution of titanium, but due to the addition of solid particles (although its particle size is less than 65 μm), aggregates will be produced when the sodium metaaluminate solution reacts with carbon dioxide to form a gel, which affects the aluminum hydroxide. particle size, and the distribution of titanium in aluminum hydroxide is also affected

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