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Preparation method of high regularity mesoporous molecular sieve Fe-MCM-41

A mesoporous molecular sieve, fe-mcm-41 technology, applied in molecular sieve catalysts, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve uneven distribution of metal ions, reduced material regularity, uneven surface, etc. problem, to achieve strong application value, enhanced selectivity and activity, and uniform distribution

Inactive Publication Date: 2011-09-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Domestic patent CN 96117259 impregnates Zr-containing soluble salt solution to load metal Zr on molecular sieves. This type of molecular sieve has the defects of uneven surface and low regularity
CN 1552624 introduces a method for modifying molecular sieve MCM-41 through post-treatment, but the distribution of metal ions is uneven and the regularity of the material is reduced

Method used

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  • Preparation method of high regularity mesoporous molecular sieve Fe-MCM-41
  • Preparation method of high regularity mesoporous molecular sieve Fe-MCM-41
  • Preparation method of high regularity mesoporous molecular sieve Fe-MCM-41

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Embodiment 1

[0024] Add 4.86g CTAB to 100ml deionized water, stir for 15min, then add 13.9ml tetraethyl orthosilicate dropwise to obtain a clear solution, continue stirring for 6 hours, then add lye to adjust the pH of the system to 11. The mixed slurry was continuously stirred for 8 hours, then suction-filtered, washed until the pH of the filtrate was 7, and dried at 100-120° C. to obtain the matrix Si-MCM-41. Then it was put into a solution containing 2.4g of potassium ferricyanide, stirred vigorously for 6 hours, and the product was suction filtered, washed, and dried at 373K for 6 hours. at 1°C·min -1 The rate was programmed to increase the temperature to 550°C, keep the temperature for 5h, and remove the template to obtain the target product. Denote it as sample 1.

Embodiment 2

[0026] Add 4.86g CTAB to 100ml deionized water, stir for 15min, then add 13.9ml tetraethyl orthosilicate dropwise to obtain a clear solution, continue stirring for 6 hours, then add lye to adjust the pH of the system to 11. The mixed slurry was continuously stirred for 8 hours, then suction-filtered, washed until the pH of the filtrate was 7, and dried at 100-120° C. to obtain the matrix Si-MCM-41. Then it was put into a solution containing 2.8g of potassium ferricyanide, stirred vigorously for 6 hours, and the product was suction filtered, washed, and dried at 373K for 6 hours. at 1°C·min -1 The rate was programmed to increase the temperature to 550°C, keep the temperature for 5h, and remove the template to obtain the target product. Denoted as sample 1.

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Abstract

The invention provides a preparation method of a high regularity mesoporous molecular sieve Fe-MCM-41. The preparation method is characterized in that an aftertreatment for a Si-MCM-41 matrix is carryed out to make the Si-MCM-41 matrix have an interaction with at least one soluble ferric salt to introduce a hetero atom Fe into the Si-MCM-41 matrix without any influence for a structure of the Si-MCM-41 matrix and thus a high regularity mesoporous molecular sieve Fe-MCM-41 is synthesized. The high regularity mesoporous molecular sieve Fe-MCM-41 has the advantages of uniform aperture sizes, big specific surface area and aperture volume, and favorable thermostability.

Description

1. Technical field [0001] The invention relates to a method for preparing high regularity mesoporous molecular sieve Fe-MCM-41, in particular to a method for preparing high regularity Fe-MCM-41 molecular sieve through post-treatment. 2. Background technology [0002] With the development of molecular sieves and the improvement in the performance requirements of catalytic materials in the field of catalysis, microporous molecular sieves are important shape-selective catalysts in the modern petroleum industry. Due to the limitation of pore size, it is difficult for large-diameter molecules to enter the pores. The macromolecules cannot escape quickly, resulting in side reactions, which limit its application range. In order to overcome the limitations of the pore size of microporous molecular sieves, molecular sieves with larger pore size and spatial structure have become the hotspots of molecular sieve research. According to the definition of the International Union of Pure an...

Claims

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Application Information

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IPC IPC(8): C01B39/08B01J29/76
Inventor 李保山徐俊青
Owner BEIJING UNIV OF CHEM TECH
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