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Preparation method of spherical molecular sieve catalyst

A spherical molecular sieve, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the inability to meet the needs of catalyst particle size

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter of the microspheres prepared by this method is 30-200 microns, which cannot meet the needs of some reactions on the particle size of the catalyst

Method used

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  • Preparation method of spherical molecular sieve catalyst
  • Preparation method of spherical molecular sieve catalyst
  • Preparation method of spherical molecular sieve catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 2.25g of aluminum powder with an average particle size of 50μm to 15.2g of hydrochloric acid with a concentration of 15% by weight, and prepare a salt-aluminum glue with an aluminum content of 12.9% by weight at 90°C; add to the salt-aluminum glue first and then 50g of water and 2.83g of H-ZSM-5 molecular sieve were stirred for 30 minutes to fully mix the salt-aluminum glue and the molecular sieve to form a mixed slurry; add 2.7g of hexamethylenetetramine to the mixed slurry and put it in an ice bath, fully mix to obtain a slurry, and then Use a 0.8mm needle to drop the slurry into a stator oil column with an oil temperature of 85°C and a height of 2500mm (purchased from Beijing Sifang Special Oil Factory, brand GS-1, with a viscosity of 263mPa·S at 40°C) for molding ; Separate the formed gel balls from the oil column, age at 130°C for 4 hours, then wash the aged balls, dry at 120°C for 4 hours, and roast at 500°C for 4 hours to obtain spherical H- ZSM-5 molecular s...

Embodiment 2

[0043] The spherical molecular sieve catalyst was prepared by the method of Example 1, except that the amount of H-ZSM-5 molecular sieve added was 4.25 g.

[0044] The H-ZSM-5 molecular sieve content in the obtained spherical H-ZSM-5 molecular sieve catalyst was 50% by weight. The physical properties of the spherical H-ZSM-5 molecular sieve catalyst are shown in Table 1.

[0045] The appearance of gained spherical H-ZSM-5 molecular sieve catalyst and figure 1 Similar, the XRD spectrum is as figure 2 As shown, the IR spectrum is as image 3 shown.

Embodiment 3

[0047] The spherical molecular sieve catalyst was prepared by the method of Example 1, except that the amount of H-ZSM-5 molecular sieve added was 6.38 g.

[0048] The H-ZSM-5 molecular sieve content in the obtained spherical H-ZSM-5 molecular sieve catalyst was 60% by weight. The physical properties of the spherical H-ZSM-5 molecular sieve catalyst are shown in Table 1.

[0049] The appearance of gained spherical H-ZSM-5 molecular sieve catalyst and figure 1 Similar, the XRD spectrum is as figure 2 As shown, the IR spectrum is as image 3 shown.

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Abstract

The invention provides a preparation method of a spherical molecular sieve catalyst. The method comprises the following steps of mixing alumina sol, a molecular sieve and organic amine so as to obtain slurry, molding the slurry by an oil column molding method, then aging, drying and roasting sequentially. The method provided by the invention can be used for preparing spherical molecular sieve catalyst which is uniform in particle size and controllable in size, and moreover, the prepared spherical molecular sieve catalyst has relatively high particle intensity.

Description

technical field [0001] The invention relates to a preparation method of a spherical molecular sieve catalyst. Background technique [0002] With the continuous advancement of the industrialization process of the domestic ebullating bed process, moving bed process and slurry bed process, the demand for spherical catalysts suitable for the above reactor process is increasing. At present, the methods for preparing spherical molecular sieve catalysts mainly include spray molding method and rolling molding method. However, the spray molding method usually prepares microsphere catalysts, the size of which is generally less than 0.05mm, and the particle size is small, which cannot meet the needs of some reactions (for example, the aromatization reaction requires a catalyst with a particle size of about 1.2-1.8mm); and Although the rotomolding method can prepare catalysts with larger particle sizes, because the particle size of the spherical catalysts cannot be accurately controlle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/08B01J29/40B01J29/70B01J29/85
Inventor 廖小元刘志坚曹光伟张敏宏李殿卿张毅张新军钟健
Owner CHINA PETROLEUM & CHEM CORP
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