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Preparation method of spherical catalyst carrier with magnetic anisotropy

A catalyst carrier, magnetic anisotropy technology, applied in catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of weak magnetism, poor high temperature resistance, low remanence, etc. , Good recycling effect, low cost effect

Inactive Publication Date: 2012-11-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current magnetic catalysts have the problems of low remanence, weak magnetism, poor high temperature resistance, and poor recovery effect. exhibits magnetic isotropy

Method used

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  • Preparation method of spherical catalyst carrier with magnetic anisotropy
  • Preparation method of spherical catalyst carrier with magnetic anisotropy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a. α-Fe with a magnetic core size of 0.1 μm 2 o 3 Add it into the aluminum sol, mechanically stir to disperse the magnetic nucleus evenly in the aluminum sol, and place it in the refrigerator to cool to minus 5°C. The magnetic nucleus accounts for 10% of the total mass of the magnetic nucleus and the aluminum sol, and the mass of the aluminum element in the aluminum sol The content is 10%.

[0024] b. Configure a 1mol / l hexamethylenetetramine solution, cool it to minus 5°C, then add it dropwise to the aluminum sol containing the magnetic nucleus, stir evenly, the molar ratio of Al to hexamethylenetetramine in the sol It is 1:1.

[0025] c. Drop the sol obtained in step b) into a magnetic field oil column forming device with a magnetic field strength of 0.2T and an oil column temperature of 90°C. After forming for 120 minutes, separate the formed pellets, then age at 120°C for 5 hours, and wash Afterwards, it was dried at 80°C for 5 hours, and then calcined at 500°C f...

Embodiment 2

[0028] a. Gamma-Fe with a magnetic core size of 10 μm 2 o 3 Add it into the aluminum sol, stir mechanically to evenly disperse the magnetic core in the aluminum sol, and place it in the refrigerator to cool to minus 3°C. The magnetic core accounts for 18% of the total mass of the magnetic core and the aluminum sol, and the mass of the aluminum element in the aluminum sol The content is 15%.

[0029] b. Prepare a 1mol / l urea solution, cool it to minus 5°C, then add it dropwise into the aluminum sol containing the magnetic core, and stir evenly. The molar ratio of Al and hexamethylenetetramine in the sol is 4:1.

[0030] c. Drop the sol obtained in step b) into a magnetic field oil column forming device with a magnetic field strength of 0.5T and an oil column temperature of 95°C. After forming for 100 minutes, separate the formed pellets, then age at 140°C for 5 hours, and wash Afterwards, it was dried at 80°C for 10 hours, and then calcined at 600°C for 6 hours to obtain a ma...

Embodiment 3

[0033] a. Fe with a magnetic core size of 1 μm 3 o 4 Add it into the aluminum sol, stir mechanically to evenly disperse the magnetic core in the aluminum sol, and put it in the refrigerator to cool to minus 5°C. The magnetic core accounts for 25% of the total mass of the magnetic core and the aluminum sol, and the mass of the aluminum element in the aluminum sol The content is 7%.

[0034] b. Configure a 0.5mol / l hexamethylenetetramine solution, cool it to minus 5°C, then add it dropwise to the aluminum sol containing the magnetic core, stir evenly, the mole of Al and hexamethylenetetramine in the sol The ratio is 2.5:1.

[0035] c. Drop the sol obtained in step b) into the magnetic field oil column forming device, the magnetic field strength is 1.2T, the oil column temperature is 90°C, after forming for 120min, separate the formed pellets, then age at 140°C for 5h, and wash Afterwards, it was dried at 80°C for 10 hours, and then calcined at 400°C for 6 hours to obtain a ma...

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Abstract

The invention discloses a preparation method of a spherical catalyst carrier with magnetic anisotropy. The preparation method comprises the following steps: adding a magnetic core to aluminum sol; adding organic amine solution and then evenly mixing; and adding the obtained mixed solution to magnetic-field oil column equipment for molding, ageing, washing, drying and roasting to finally obtain the spherical catalyst carrier with the magnetic anisotropy. By means of the method, the spherical carriers with different diameter can be prepared; the obtained spherical carrier has the advantages of low cost, no pollution, strong magnetic property, high-temperature resistance and good recovery effect, and can be produced in quantity; and the carrier is mainly used in various substances with catalytic activity such as a supported solid acid catalyst, a solid base catalyst, a photocatalyst or a biocatalyst, and can be also used in the fields such as catalytic hydrogenation in a fluidized bed and a magnetically stabilized bed, and separation and reutilization of the catalysts.

Description

technical field [0001] The invention relates to a method for preparing a magnetically anisotropic spherical catalyst carrier. Background technique [0002] Spherical catalyst carrier particles have the characteristics of uniform filling, uniform and stable fluid resistance, excellent pore structure, large specific surface area, good physical strength and acid and alkali resistance stability, and have good mechanical strength and fluidity and can It has been widely used to reduce the wear and tear caused by catalyst fluidization. Alumina has the advantages of high specific surface area, rich pore structure, and high thermal stability. It is widely used in important reaction processes such as oxidation, hydrogenation, dehydrogenation, isomerization, disproportionation, polymerization, and reforming. The carrier with the greatest demand. [0003] The research on the preparation of spherical alumina by oil column molding began in the 1950s. First, aluminum powder or aluminum c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J23/78B01J35/08
Inventor 于濂清钟晓亮刘晨光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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