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A kind of hydrodesulfurization catalyst and preparation method thereof

A hydrodesulfurization and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the small pore size of the catalyst is not conducive to the entry of residual oil reactant molecules , Catalyst’s hydrogenation carbon removal activity needs to be further improved to achieve the effect of improving diffusion capacity, promoting penetration and uniformity

Active Publication Date: 2022-07-12
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.

Method used

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  • A kind of hydrodesulfurization catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 14.5 grams of activated carbon with a particle size of 4 microns, 140 grams of pseudo-boehmite, 3 grams of succulent powder, 7.8 grams of nickel nitrate, 3.1 grams of cobalt nitrate, mix well, add an appropriate amount of 1.5% acetic acid aqueous solution and knead , extrusion molding, the molded product is dried at 100 ° C for 6 hours, and the dried product is calcined at 700 ° C for 5 hours in an air atmosphere to obtain an intermediate.

[0052] Take by weighing 100 grams of above-mentioned intermediates, place in 450 grams of ammonium bicarbonate solutions, the mass concentration of this ammonium bicarbonate solution is in the aqueous solution of 15.5%, the mixture material is transferred into the autoclave and sealed at a speed of 15 ℃ / min The temperature was raised to 100°C for 3 hours, then heated to 135°C for 5 hours at a rate of 10°C / min, and then the carrier was dried at 100°C for 6 hours and calcined at 700°C for 5 hours to obtain a modified alumina-base...

Embodiment 2

[0055] With Example 1, the activated carbon was changed to the charcoal with a particle size of 5 microns when preparing the alumina intermediate, the charcoal addition was 17.5 grams, the addition of nickel nitrate was 5.1 grams, and the addition of cobalt nitrate was 6.6 grams. During the heat treatment, the mass of the ammonium bicarbonate solution was 550 grams, and the mass concentration of the ammonium bicarbonate solution was 17.5%. The sealing pretreatment temperature was 90°C, the treatment time was 2 hours, the heat treatment temperature was 145°C, and the treatment time was 6 hours, to obtain the modified alumina-based carrier. MoO in the final catalyst 3 11.8wt%, WO 3 2.1 wt%, the properties of catalyst Cat-2 are shown in Table 1. Among them, the length of the modified alumina-based carrier is mainly 1.5-4 μm in the length of the rod-shaped modified alumina in the micron-scale pores, and the length of the rod-shaped alumina on the outer surface of the main modif...

Embodiment 3

[0057] Same as Example 1, except that the activated carbon particle size is 3 microns of charcoal when preparing the alumina intermediate, the addition is 19 grams, the addition of nickel nitrate is 6.3 grams, and the addition of cobalt nitrate is 4.7 grams. During the heat treatment, the mass of the ammonium bicarbonate solution was 650 grams, and the mass concentration of the ammonium bicarbonate solution was 19%. The heat treatment temperature was 155°C, and the treatment time was 4.5 hours to obtain a modified alumina-based carrier. MoO in the final catalyst 3 12.4wt%, WO 3 1.8wt%, the properties of catalyst Cat-3 are shown in Table 1. Among them, the length of the modified alumina-based carrier is mainly 1-2.5 μm in the length of the rod-shaped modified alumina in the micron-scale pores, and the length of the rod-shaped alumina on the outer surface of the main modified alumina is mainly 3-7 μm. The diameter of the modified alumina is 100-250nm, the coverage rate of the...

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Abstract

The invention discloses a hydrodesulfurization catalyst and a preparation method thereof. The catalyst includes a modified alumina-based support, molybdenum and tungsten metal components, the modified alumina-based support contains nickel and cobalt metal components, and the modified alumina-based support includes bulk modified alumina and rod-shaped modified alumina The modified alumina of the main body is modified alumina with micron-scale pores, wherein at least part of the rod-shaped modified alumina is distributed on the outer surface of the main modified alumina and the pore diameter D is 3-7 μm in micron-scale pores. The hydrodesulfurization catalyst has high hydrodesulfurization activity and hydrodesulfurization carbon residue removal activity when used in residual oil hydrogenation reaction.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a hydrodesulfurization catalyst and a preparation method thereof. Background technique [0002] With the increasing weight and quality of oil, it brings more and more difficulties to oil processing. Heavy oil residues contain a large amount of sulfur, most of which are contained in asphaltenes, which are difficult to remove. As an important process in petroleum refining and synthetic ammonia production using petroleum as raw material, hydrodesulfurization has always received attention. However, in recent years, the quality of petroleum has become heavier and worse, while the requirements for product quality are more stringent, and the requirements for feedstock in subsequent processes are also becoming more and more stringent. In addition, since human beings entered the 21st century, people's awareness of environmental protection has been continuously enhanced, and environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J35/10B01J37/10B01J37/08C10G45/08
CPCB01J23/883B01J35/1019B01J35/1042B01J37/10B01J37/08C10G45/08Y02A50/20
Inventor 隋宝宽季洪海彭冲吕振辉
Owner CHINA PETROLEUM & CHEM CORP
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