Silicon-containing alumina carrier and its preparation method and application

A silica alumina, alumina technology, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor mechanical strength, unsuitable pore structure, etc. Achieve the effect of improving the anti-sintering ability, improving the anti-carbon deposition, and improving the hole expansion effect.

Active Publication Date: 2021-07-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a method for preparing a silicon-containing alumina carrier in order to overcome the problems of unsuitable pore structure and poor mechanical strength in the prior art silicon-containing alumina carrier, and the silicon-containing alumina carrier prepared by the method With high mechanical strength and suitable pore structure, it is especially suitable for the field of hydrodemetallization of residual oil

Method used

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  • Silicon-containing alumina carrier and its preparation method and application

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preparation example Construction

[0021] The preparation method of the silicon-containing alumina carrier provided by the present invention comprises the following steps,

[0022] (1) performing a first contact with the first silicon-containing solution and a first physical pore-enlarging agent, and performing a second contact with the second silicon-containing solution and a second physical pore-enlarging agent;

[0023] (2) Mixing, forming, drying, and roasting the contacted first physical pore-enlarging agent obtained in step (1), the contacted second physical pore-enlarging agent and pseudo-boehmite to obtain a silicon-containing alumina carrier;

[0024] Wherein, both the first silicon-containing solution and the second silicon-containing solution contain silicate, the particle size of the first physical pore-enlarging agent is 100-540 mesh, and the particle size of the second physical pore-enlarging agent is 900-540 mesh. 2000 mesh.

[0025] According to the present invention, the first physical pore-en...

Embodiment 1

[0052] 1) Weigh 15 grams of the first carbon black powder with a particle diameter of 400 meshes and place it in a spray boiling pan, and use a nozzle atomization method to impregnate the first carbon black powder with unsaturated Method: Spray 7.5 mL of ethanol solution of ethyl orthosilicate (amount is 50% of the saturated water absorption of the first carbon black powder, which is equivalent to containing 4 grams of silicon dioxide).

[0053] 2) Weigh 5 grams of the second carbon black powder with a particle diameter of 1300 mesh and place it in a spray boiling pot, and spray the second carbon black powder in a saturated impregnated manner in an atomized manner under the rotating state of 90 rpm. Soak in 5 mL of ethanol solution of ethyl orthosilicate (the amount used is the saturated water absorption of the second carbon black powder, which is equivalent to containing 0.5 g of silicon dioxide).

[0054] 3) the first carbon black powder after the impregnation obtained in th...

Embodiment 2

[0056] Prepare the silicon-containing alumina carrier in the same manner as in Example 1, except that the particle diameter of the first carbon black powder is 325 mesh, and the addition amount is 12.5 grams, and the ethanol solution of 3.8 mL of methyl orthosilicate is used (consumption is the first 30% of the saturated water absorption of a carbon black powder, which is equivalent to containing 2 grams of silicon dioxide) sprays the first carbon black powder. The particle diameter of the second carbon black powder is 1100 meshes, and the add-on is 7.5 grams, uses the ethanol solution of 7.5mL orthosilicate methyl ester (consumption is the saturated water absorption of the second carbon black powder, wherein is equivalent to containing 1 gram of silicon dioxide ) spray the second carbon black powder. The calcination temperature under nitrogen atmosphere is 500°C, and the calcination temperature under air atmosphere is 750°C. The silicon-containing alumina carrier S2 was prep...

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Abstract

The invention relates to the field of catalyst carrier preparation, and discloses a silicon-containing alumina carrier and a preparation method and application thereof. The method includes the following steps: (1) first contacting a first silicon-containing solution with a first physical pore-enlarging agent, and The second silicon-containing solution is contacted with the second physical pore-enlarging agent for the second time; (2) the contacted first physical pore-enlarging agent obtained in step (1), the contacted second physical pore-enlarging agent and the pseudo thin water The bauxite is mixed, shaped, dried, and calcined to obtain a silicon-containing alumina carrier; wherein, both the first silicon-containing solution and the second silicon-containing solution contain silicate, and the particle size of the first physical pore-enlarging agent is 100-540 mesh, the particle size of the second physical pore-enlarging agent is 900-2000 mesh. The silicon-containing alumina carrier prepared by the method has high mechanical strength and a suitable pore structure, and is especially suitable for the field of residual oil hydrogenation demetallization.

Description

technical field [0001] The invention relates to the field of catalyst carrier preparation, in particular to a silicon-containing alumina carrier and its preparation method and application. Background technique [0002] With the improvement of the level of deep processing of raw materials worldwide, the main energy structure is gradually developing towards macromolecules and high carbon, especially for my country where crude oil is generally heavy. In order to effectively solve the problems of excessive diffusion resistance of heavy oil components in the catalyst pores, heavy metal impurity deposition and coking caused by catalyst activity decline or deactivation, it is urgently required that the alumina carrier widely used in the petrochemical industry has a large pore volume and The characteristics of large aperture. The large pore size is conducive to the diffusion of macromolecular compounds into the catalyst particles, and the large pore volume is conducive to improving...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/08B01J23/883C10G45/08
CPCB01J21/08B01J23/883B01J35/1019B01J35/1042B01J35/1061B01J37/0018B01J37/0201C10G45/08C10G2300/70
Inventor 任靖张勇李顺新宋春利姜艳
Owner CHINA PETROLEUM & CHEM CORP
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