A kind of alumina carrier, hydrodemetallization catalyst and preparation method thereof

A technology of alumina carrier and alumina, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the problems of specific surface area and mechanical strength reduction, and achieve high acceleration Hydrogen desulfurization activity, promoting penetration and uniformity, and prolonging the effect of operating cycle

Active Publication Date: 2021-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While increasing the macropores, the specific surface area and mechanical strength will be reduced. Therefore, when the physical pore-enlarging agent is used for pore-enlarging, it will be limited by other performance requirements of the catalyst, and it is often impossible to give consideration to both.

Method used

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  • A kind of alumina carrier, hydrodemetallization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 260 grams of pseudo-boehmite dry rubber powder (manufactured by Wenzhou Jingjing Alumina Co., Ltd.), 30 grams of activated carbon with a particle size of 10 microns, and 8 grams of celadon powder, mix the above physically, and add an appropriate amount of 1.5% aqueous solution of acetic acid was kneaded, extruded into strands, dried at 100°C for 6 hours, and calcined at 700°C for 5 hours in an air atmosphere to obtain the alumina carrier intermediate ZA1.

[0046] Weigh 100 grams of the above-mentioned alumina carrier intermediate ZA1, place it in 600 grams of ammonium bicarbonate solution, the mass concentration of the ammonium bicarbonate solution is 18% in an aqueous solution, transfer the mixed material into an autoclave and seal it, and heat it at 15°C Raise the temperature to 100°C at a speed of 10°C / min and keep the temperature for 3 hours, then raise the temperature to 140°C at a speed of 10°C / min and keep the temperature for 6 hours, then dry the carrier a...

Embodiment 2

[0048] Same as Example 1, except that the activated carbon was changed to polyvinyl alcohol with a particle size of 8 microns, and the amount of polyvinyl alcohol added was 36 grams to obtain the alumina carrier intermediate ZA2. The quality of ammonium bicarbonate solution is 800 grams, and the mass concentration of ammonium bicarbonate solution is 17.5%. The sealing pretreatment temperature was 90°C, the treatment time was 2 hours, the heat treatment temperature was 120°C, and the treatment time was 8 hours, and the alumina carrier A2 was prepared. The properties of the carrier are shown in Table 1. In the alumina carrier A2, the length of the rod-shaped alumina in the micron-sized pores is mainly 2.5-7.0 μm, the length of the rod-shaped alumina on the outer surface of the main alumina is mainly 3-8 μm, and the outer surface of the main alumina The coverage rate of the upper rod-shaped alumina accounts for about 74%, and the coverage rate of the rod-shaped alumina in the mai...

Embodiment 3

[0050] The same as in Example 1, except that the activated carbon was changed to wood chips with a particle size of 5 microns, and the amount of wood chips added was 40 grams to obtain the alumina carrier intermediate ZA3. The quality of ammonium bicarbonate solution is 800 grams, and the mass concentration of ammonium bicarbonate solution is 20%. The heating rate before sealing pretreatment was 11°C / min, the heating rate after sealing pretreatment was 5°C / min, the heat treatment temperature was 150°C, and the treatment time was 4 hours to prepare alumina carrier A3. The properties of the carrier are shown in the table 1. In the alumina carrier A3, the length of the rod-shaped alumina in the micron-sized pores is mainly 1.5-4.5 μm, the length of the rod-shaped alumina on the outer surface of the main alumina is mainly 3-8 μm, and the outer surface of the main alumina The coverage rate of the upper rod-shaped alumina accounts for about 85%, and the coverage rate of the rod-sha...

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Abstract

The invention discloses an alumina carrier, a hydrogenation demetallization catalyst and a preparation method thereof. The alumina carrier includes host alumina and rod-shaped alumina, at least part of the rod-shaped alumina is distributed on the outer surface of the host alumina and in micron-sized pores, and the alumina carrier has a pore diameter of 15-35nm and 100-800nm. Bimodal pore distribution. The alumina carrier is prepared by the following method, including: (1) preparing an alumina carrier intermediate; (2) immersing the alumina carrier intermediate in an ammonium bicarbonate solution, and then sealing and heat-treating the material, drying and roasting the material after heat treatment, An alumina support is produced. The alumina carrier can take into account large pore size, high specific surface area and mechanical strength, and is suitable for heavy oil hydrodemetallization catalysts.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, in particular to an alumina carrier used for a heavy oil hydrogenation demetallization catalyst, a preparation method thereof and a hydrogenation demetallization catalyst prepared by using the carrier. Background technique [0002] In the production process of heavy oil hydrodemetallization, since a large amount of sulfur and nitrogen in heavy oil exist in asphaltene micelles, the molecular diameter of asphaltene is 4-5nm, and the formed asphaltene micelles are stable in colloids. It exists in heavy oil under the action of agents, and its diameter ranges from 10nm to hundreds of nm. In the heavy oil hydrogenation series catalysts, even if there is a hydrodemetallization catalyst before the heavy oil hydrodesulfurization, denitrogenation, and carbon removal catalysts, the macromolecule asphaltenes are partially broken to form small asphaltene micelles, but due to the The pore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J23/85C10G45/08
Inventor 关月明季洪海隋宝宽彭冲吕振辉佟佳
Owner CHINA PETROLEUM & CHEM CORP
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