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Hydrodesulfurization catalyst and preparation method thereof

A hydrodesulfurization and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of small catalyst pore size and catalyst hydroderesidue carbon activity It needs to be further improved, and it is not conducive to the entry of residual oil reactant molecules.

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.

Method used

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  • Hydrodesulfurization catalyst and preparation method thereof

Examples

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 pseudoboehmite, 3 grams of scallop 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 , extruded, dried at 100°C for 6 hours, and baked at 700°C for 5 hours in an air atmosphere to obtain an intermediate.

[0052] Weigh 100 grams of the above-mentioned intermediate, place it in 450 grams of ammonium bicarbonate solution, and the mass concentration of the ammonium bicarbonate solution is in an aqueous solution of 15.5%, transfer the mixed material into an autoclave and seal it at a speed of 15°C / min After raising the temperature to 100°C, keep the temperature for 3 hours, then raise the temperature to 135°C at a rate of 10°C / min for 5 hours, then dry the carrier at 100°C for 6 hours, and bake it at 700°C for 5 hours to obtain a modified alumina-based carrier.

[0053] Weigh 50 grams of the a...

Embodiment 2

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

Embodiment 3

[0057] With embodiment 1, just prepare the charcoal that gac particle diameter is 3 microns when preparing alumina intermediate, add-on is 19 grams, and the add-on of nickel nitrate is 6.3 grams, and the add-on of cobalt nitrate is 4.7 grams. The quality of ammonium bicarbonate solution is 650 grams during heat treatment, and the mass concentration of ammonium bicarbonate solution is 19%. The heat treatment temperature is 155° C., and the treatment time is 4.5 hours to prepare a modified alumina-based carrier. Contains 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 modified alumina-based carrier, the length of the rod-shaped modified alumina in the micron-sized pores is mainly 1-2.5 μm, 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 of rod-shaped modified alumina on the outer s...

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Abstract

The invention discloses a hydrodesulfurization catalyst and a preparation method thereof. The catalyst comprises a modified alumina-based carrier and molybdenum and tungsten metal components, whereinthe modified alumina-based carrier contains nickel and cobalt metal components; the modified alumina-based carrier comprises main body modified alumina and rod-like modified alumina, the main body modified alumina is modified alumina with micron-sized pore channels, and at least part of the rod-like modified alumina is distributed on the outer surface of the main body modified alumina and in the micron-sized pore channels with the pore diameter D of 3-7 microns. The hydrodesulfurization catalyst has high hydrodesulfurization activity and hydrogenation carbon residue removal activity when usedin a 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 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 has been con...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J35/10B01J37/10B01J37/08C10G45/08
CPCB01J23/883B01J37/10B01J37/08C10G45/08B01J35/635B01J35/615Y02A50/20
Inventor 隋宝宽季洪海彭冲吕振辉
Owner CHINA PETROLEUM & CHEM CORP
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