A kind of preparation method of SSZ-13 molecular sieve catalyst
A molecular sieve and catalyst technology, applied in the field of molecular sieve, can solve the problems of long preparation time of SSZ-13, and achieve the effect of high yield, simple and fast operation
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Embodiment 1
[0026] Weigh 0.31g of sodium hydroxide and 23.10g of deionized water, mix well, stir at room temperature for 30min, add 2.57g of N,N,N-trimethyl-1-adamantyl ammonium hydroxide dropwise, stir for 30min, add 4.04g of ZSM -5 molecular sieve (SiO 2 / Al 2 o 3 =38), stirred at 25°C for 30min, and aged for 1h.
[0027] The solution obtained above was transferred to a reaction kettle, heated to 160°C for crystallization, and crystallized for 4 hours. The obtained product was washed, filtered and dried; the dried sample was fully calcined at 450°C for 5 hours to obtain the SSZ-13 sample.
[0028] figure 1 The XRD information of the obtained SSZ-13 molecular sieve is given.
[0029] The XRD pattern shows that it is SSZ-13 molecular sieve, no miscellaneous crystals appear, and it has good crystallinity.
Embodiment 2
[0031] Weigh 0.28g of sodium hydroxide and 23.10g of deionized water, mix well, stir at room temperature for 30min, add dropwise an appropriate amount of N,N,N-trimethyl-1-adamantyl ammonium hydroxide 2.07g, stir at room temperature for 30min, add 2g ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 =80), stirred at 25°C for 30min, and aged for 4h.
[0032] Transfer the solution obtained above to a reaction kettle, raise the temperature to 140°C for crystallization, and crystallize for 16 hours. The obtained product is washed, filtered and dried; the dried sample is fully calcined at 500°C for 6 hours to obtain SSZ-13 molecular sieve.
[0033] figure 2 The XRD information of the obtained SSZ-13 molecular sieve is given.
[0034] The XRD pattern shows that it is SSZ-13 molecular sieve, no miscellaneous crystals appear, and it has good crystallinity.
Embodiment 3
[0036] Weigh 0.31g of potassium hydroxide and 18.96g of deionized water, mix well, stir at room temperature for 30min, add dropwise an appropriate amount of N,N,N-trimethyl-1-adamantyl ammonium hydroxide 4.57g, stir at room temperature for 30min, add 2.69 g ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 =200), stirred at 25°C for 30min, and aged for 8h.
[0037] The solution obtained above was transferred to a reaction kettle, heated to 200°C for crystallization, and crystallized for 48 hours. The obtained product was washed, filtered, and dried; the dried sample was fully calcined at 550°C for 4 hours to obtain SSZ-13 molecular sieve.
[0038] image 3 Given the obtained SSZ-13 molecular sieve XRD information, Figure 4 The SEM image of the sample is given, showing the crystal morphology and size of SSZ-13 molecular sieve.
[0039] The XRD pattern shows that it is SSZ-13 molecular sieve with no miscellaneous crystals and high crystallinity. The scanning electron microscope shows...
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