Alumina carrier, hydrodemetallization catalyst and preparation method of hydrodemetallization catalyst

A technology of alumina carrier and alumina, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., and can solve the problems of specific surface area and mechanical strength reduction

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

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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  • Alumina carrier, hydrodemetallization catalyst and preparation method of hydrodemetallization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Weigh 30 grams of activated carbon with a particle size of 10 microns, spray and impregnate the activated carbon with a phosphoric acid solution with a mass concentration (calculated as phosphorus pentoxide) of 6% to saturate the activated carbon. Stone (manufactured by Wenzhou Jingjing Alumina Co., Ltd.), 8 grams of Sesame powder, mixed evenly, adding an appropriate amount of 1.5% acetic acid aqueous solution, kneaded, extruded, and dried at 110°C for 6 hours, and dried in air atmosphere , and calcined at 650°C for 5 hours to obtain the alumina carrier intermediate ZA1.

[0057] 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 r...

Embodiment 2

[0060] Same as Example 1, except that activated carbon is changed to wood chips with a particle size of 8 microns, the amount of wood chips added is 36 grams, the phosphoric acid solution is changed to boric acid solution, and the mass concentration of the solution (calculated as boron oxide) is 8% to obtain an 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 is 90°C, the treatment time is 2 hours, the heat treatment temperature is 120°C, the treatment time is 8 hours, the sorbitol solution is changed to glucose solution, the mass concentration of the solution is 15%, and the consumption of the solution is 6ml. Aluminum carrier A2, 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 2.5-7.5 μm, the length of the rod-shaped alumin...

Embodiment 3

[0062]Same as Example 1, except that the activated carbon is changed to a particle size of 5 microns, the addition is 40 grams, the phosphoric acid solution is changed to an ammonium monohydrogen phosphate solution, and the mass concentration of the solution (calculated as phosphorus pentoxide) is 10%, to obtain aluminum oxide 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 the sealing pretreatment was 11°C / min, the heating rate after the sealing pretreatment was 5°C / min, the heat treatment temperature was 150°C, the treatment time was 4 hours, the sorbitol solution was changed to the mannitol solution, the quality of the solution The concentration was 30%, and the amount of the solution was 5ml to prepare the alumina carrier A3. The properties of the carrier are shown in Table 1. In the alumina carrier A3, the length of the rod-shaped alumina in th...

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Abstract

The invention discloses an alumina carrier, a hydrodemetallization catalyst and a preparation method of the hydrodemetallization catalyst. The alumina carrier comprises main body alumina and rod-likealumina, and at least part of the rod-like alumina is distributed on the outer surface of the main body alumina and in micron-sized pore channels; rod-shaped alumina on the outer surface contains carbon, and rod-shaped alumina in the micron-sized pore channels contains modified elements. The preparation method of the alumina carrier comprises the following steps: dipping a physical pore-enlargingagent in a solution containing the modified elements, then mixing and kneading the physical pore-enlarging agent with pseudo-boehmite for molding, drying and roasting to prepare an alumina carrier intermediate; immersing the alumina carrier intermediate into an ammonium bicarbonate solution, carrying out sealed heat treatment, and drying; and spraying and impregnating the outer surface of the material with a carbon-containing solution, drying and roasting to obtain the alumina carrier. The alumina carrier has large pore size, high specific surface area and high 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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IPC IPC(8): B01J27/16B01J21/04B01J27/19B01J23/883B01J32/00B01J35/10B01J37/02B01J37/08C10G45/08
CPCB01J27/16B01J21/04B01J27/19B01J23/883B01J37/0207B01J37/08C10G45/08C10G2300/205C10G2300/1077C10G2300/202B01J35/635B01J35/615
Inventor 隋宝宽季洪海彭冲吕振辉
Owner CHINA PETROLEUM & CHEM CORP
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