Synthetic method of small-crystal-grain nano zeolite molecular sieve
A nano-zeolite and molecular sieve technology, applied in the direction of crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminum silicate zeolite, etc.
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Embodiment 1
[0021] Synthesis method: add 10g water, 0.1g aluminum sulfate octadecahydrate, 2g sodium hydroxide solution with a mass fraction of 30%, 4g sodium fluoride, and 13g tetrapropylammonium bromide into the reaction kettle, stir evenly, and then add 6g mass fraction For 40% silica sol, stir for 30 minutes, and age the gel for 8 hours at room temperature. Afterwards, under stirring at 150rpm, the room temperature was programmed to rise to 60°C at 0.83°C / min. After crystallization for 1 day, the temperature was programmed to rise to 100°C at 0.83°C / min. After 2 days of crystallization, the temperature was programmed to rise to 180°C at 0.83°C / min. 3 days. After cooling to room temperature, wash and centrifuge three times with deionized water, and dry at 80°C for 12 hours to obtain the final product.
[0022] The obtained product has the characteristic diffraction peak of ZSM-5, and has higher crystallinity. The SEM photographs of the obtained product with different magnifications c...
Embodiment 2
[0024] Synthesis method: Add 2g of 30% sodium hydroxide solution, 10g of water, 0.1g of aluminum sulfate octadecahydrate, 4g of sodium fluoride, and 5g of tetrapropylammonium bromide into the reaction kettle, stir well, and then add 6g of The silica sol with a fraction of 40% was stirred for 30 minutes, and the gel was aged for 8 hours at room temperature. Afterwards, under stirring at 150rpm, the room temperature was programmed to rise to 60°C at 1°C / min. After crystallization for 1 day, the temperature was programmed to rise to 100°C at 1°C / min. After 2 days of crystallization, the temperature was programmed to rise to 180°C at 1°C / min. 3 days. After cooling to room temperature, wash and centrifuge three times with deionized water, and dry at 80°C for 12 hours to obtain the final product.
[0025] According to the XRD characterization results of the sample, it can be seen that the product has the characteristic diffraction peak of ZSM-5, and the SEM photo shows that the sam...
Embodiment 3
[0027] Synthesis method: Add 2g of 30% sodium hydroxide solution, 0.1g of aluminum sulfate octadecahydrate, 0.54g of sodium fluoride, and 8g of tetrapropylammonium bromide into 10g of water, stir well, then add 6g of % silica sol, stirred for 30min, and aged for 8h at room temperature. Afterwards, under 150rpm stirring, the room temperature was programmed to rise to 80°C at 0.75°C / min. After crystallization for 1 day, the temperature was programmed to rise to 120°C at 0.75°C / min. After 2 days of crystallization, the temperature was programmed to rise to 180°C at 0.75°C / min. 3 days to get the final product. XRD shows that the sample has the characteristic diffraction peak of ZSM-5, and the SEM photo shows that the sample is a small particle nano-molecular sieve with a size of about 100nm.
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Abstract
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