Method for preparing ZSM-5 zeolite molecular sieve microspheres

A kind of technology of zeolite molecular sieve, ZSM-5

Inactive Publication Date: 2012-07-18
LIAONING UNIVERSITY OF TECHNOLOGY
6 Cites 22 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, the existing methods all have the disadvantages of insufficient mechanical...
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Abstract

The invention discloses a method for preparing ZSM-5 zeolite molecular sieve microspheres. The ZSM-5 zeolite molecular sieve microspheres are prepared by using methyl-containing organo-siloxane and tetraethoxysilane as silicon sources by a one-step method; the microspheres consist of small ZSM-5 zeolite particles; by changing the adding amount of the methyl-containing siloxane, the size of the microspheres can be adjusted in a range of 3-8 mu m; and the ZSM-5 zeolite molecular sieve microspheres are uniform in size, high in dispersibility, easy to prepare massively, and can be applied in the aspects of catalysis, adsorption, separation and the like.

Application Domain

Pentasil aluminosilicate zeolite

Technology Topic

Image

  • Method for preparing ZSM-5 zeolite molecular sieve microspheres
  • Method for preparing ZSM-5 zeolite molecular sieve microspheres
  • Method for preparing ZSM-5 zeolite molecular sieve microspheres

Examples

  • Experimental program(4)

Example Embodiment

[0021] Example 1
[0022] Take 1.5 ml of polymethylsiloxane and disperse it in 15 ml of absolute ethanol and stir evenly to obtain solution I for later use; weigh 0.02 g of NaAlO 2 Dissolve 0.06g NaOH in 35ml distilled water, then add 19ml tetrapropylammonium hydroxide 25% aqueous solution, stir well, add 6ml ethyl orthosilicate dropwise, stir at room temperature for 3h to obtain a transparent solution, then add 12ml solution I, After stirring at room temperature for 5 hours, a semi-transparent solution was obtained. The product was transferred to a closed reaction kettle. After crystallization at 90°C for 4 days, the reaction kettle was taken out and cooled naturally. The product in the kettle was separated, washed with ethanol for 3 times, and washed with water twice at 40°C. Vacuum drying for 36 hours, calcination in a muffle furnace at 400°C for 5 hours to obtain ZSM-5 zeolite molecular sieve microspheres.

Example Embodiment

[0023] Example 2
[0024] Disperse 2.5 ml of polymethylsiloxane in 24 ml of n-propanol and stir evenly to obtain solution I for later use; weigh out 0.08 g of NaAlO 2 Dissolve 0.12g of NaOH in 75ml of distilled water, then add 17ml of n-butylamine, add 10ml of ethyl orthosilicate dropwise after stirring, stir at room temperature for 6 hours to obtain a transparent solution, then add 20ml of solution I, and stir at room temperature for 12 hours to obtain half Transparent solution, transfer the product into a closed reaction kettle, after crystallization at 180°C for 5 days, take out the reaction kettle to cool naturally, separate the product in the kettle, first wash with ethanol 3 times, wash 2 times with water, and dry at 50°C for 24h in vacuum. The ZSM-5 zeolite molecular sieve microspheres were calcined in a muffle furnace at ℃ for 5h.

Example Embodiment

[0025] Example 3
[0026] Disperse 4.5 ml of methyltriethoxysilane in 35 ml of ethanol and stir to obtain solution I for later use; weigh 0.10 g of NaAlO 2 Dissolve 0.28g NaOH in 155ml distilled water, then add 40ml tetrapropylammonium hydroxide 25% aqueous solution, stir well and add 14ml ethyl orthosilicate dropwise, stir at room temperature for 9h to obtain a transparent solution, then add 16ml solution I, After stirring at room temperature for 24 hours, a semi-transparent solution was obtained. The product was transferred to a closed reaction vessel. After crystallization at 150°C for 7 days, the reaction vessel was taken out and cooled naturally. The product in the kettle was separated, washed with ethanol 3 times and then washed twice with water, and vacuum at 60°C. Drying for 12 hours, calcining in a muffle furnace at 550°C for 7 hours to obtain ZSM-5 zeolite molecular sieve microspheres.
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Description & Claims & Application Information

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