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Preparation method of hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Oil hydrodesulfurization and hydrodesulfurization of carbon residues

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pore size of the catalyst prepared by this method is small, which is not conducive to the entry of residue reactant molecules. In addition, the activity of the catalyst for hydrogenation and carbon removal needs to be further improved.
[0004] CN1205314C discloses a method for preparing heavy oil hydrogenation demetallization and desulfurization catalysts. The carrier is composited with two kinds of alumina, one of which is alumina powder calcined at 1100°C. The pores are penetrating, but they are still too small for the asphaltene micelles, which is not conducive to the hydrodesulfurization and hydrodecarbonization reactions of residual oil

Method used

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  • Preparation method of hydrodesulfurization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 14.5 grams of activated carbon with a particle size of 5 microns, immerse in 100 mL of aluminum nitrate solution with a mass concentration of 7.5% in terms of alumina for 2 hours, dry the impregnated activated carbon at 120°C for 4 hours, and then place it in a solution with a mass concentration of 20% The ammonia solution was immersed for 3 hours, wherein the volume of ammonia water was 12 times the volume of the physical pore-enlarging agent activated carbon, the impregnated activated carbon was dried at 120°C for 4 hours, and roasted at 450°C for 4 hours under a nitrogen protective atmosphere.

[0052] The activated carbon after the above-mentioned roasting is mixed with 125 grams of pseudoboehmite and 3 grams of fennel powder, and an appropriate amount of acetic acid aqueous solution with a mass concentration of 1.5% is added to knead, extruded, and the molded product is dried at 100 ° C for 6 hours. In an air atmosphere, it was calcined at 700° C. for 5 hours ...

Embodiment 2

[0056] With embodiment 1, just gac is changed into the charcoal that particle diameter is 6 microns, and charcoal add-on is 16.5 grams, and the mass concentration of aluminum nitrate is 8.5% in aluminum oxide, and the mass concentration of ammoniacal liquor is 25%. The quality of ammonium bicarbonate solution is 450 grams, and the mass concentration of ammonium bicarbonate solution is 20.5%. The sealing pretreatment temperature was 90°C, the treatment time was 2 hours, and the heat treatment temperature was 140°C, and the treatment time was 7 hours. The hydrodesulfurization catalyst Cat-2 was obtained. The properties of the catalyst are shown in Table 1. Among them, the modified alumina-based carrier, the length of the rod-shaped modified alumina in the micron-sized pores is mainly 1.5-5.5 μm, and the length of the rod-shaped modified alumina on the outer surface of the main modified alumina is mainly 3-8 μm , the diameter of the modified alumina is 80-230nm, the coverage of t...

Embodiment 3

[0058] Same as Example 1, except that the particle size of activated carbon is 7 microns, the addition amount is 13.5 grams, the mass concentration of aluminum nitrate is 9.5%, and the mass concentration of ammonia water is 30%. The quality of ammonium bicarbonate solution is 650 grams, and the mass concentration of ammonium bicarbonate solution is 15.5%. The heat treatment temperature was 130° C., and the treatment time was 7 hours to obtain a hydrodesulfurization catalyst Cat-3. The properties of the catalyst are shown in Table 1. Among them, the modified alumina-based carrier, the length of the rod-shaped modified alumina in the micron-sized pores is mainly 2.0-6.0 μm, and the length of the rod-shaped modified alumina on the outer surface of the main modified alumina is mainly 3-8 μm , the diameter of the modified alumina is 100-260nm, the coverage of the rod-shaped modified alumina on the outer surface of the main modified alumina is about 90%, and the coverage of the rod-...

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Abstract

The invention discloses a preparation method of a hydrodesulfurization catalyst. The method comprises the following steps: (1) sequentially adsorbing an aluminum salt solution and an alkaline solutionby using a physical pore-enlarging agent, and then drying and roasting to obtain a modified physical pore-enlarging agent; (2) kneading and molding the modified physical pore-enlarging agent obtainedin the step (1) and pseudo-boehmite, drying and roasting to obtain an intermediate; (3) immersing the intermediate obtained in the step (2) into an ammonium bicarbonate solution, then carrying out sealed heat treatment, and drying and roasting the material subjected to heat treatment to obtain a modified alumina-based carrier; and (4) impregnating the modified alumina-based carrier obtained in the step (3) with a hydrogenation active metal component impregnation liquid, and carrying out drying and roasting so as to obtain the hydrodesulfurization catalyst. The hydrodesulfurization catalyst prepared by the method has the characteristics of good macromolecular diffusion performance, strong desulfurization capability, high carbon residue removal rate and the like.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a method for preparing a residual oil hydrogenation desulfurization catalyst. Background technique [0002] With the increasingly heavy and poor quality of petroleum, it brings more and more difficulties to petroleum processing. Heavy oil residues contain a large amount of sulfur, most of which exist in asphaltene, which is a component that is difficult to remove. As an important process in petroleum refining and synthetic ammonia production using petroleum as raw material, hydrodesulfurization has always been valued by people. However, in recent years, the quality of petroleum has become heavier and worse, while the requirements for product quality have become more stringent, and the requirements for feed materials in subsequent processes have become more and more stringent. In addition, since mankind entered the 21st century, people's awareness of environmental protection ...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J35/10B01J37/10B01J37/08C10G45/08
CPCB01J23/883B01J37/10B01J37/08C10G45/08B01J35/635B01J35/615Y02P20/52
Inventor 隋宝宽季洪海彭冲吕振辉
Owner CHINA PETROLEUM & CHEM CORP
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