A kind of preparation method of hedgehog spherical suz-4
A SUZ-4, spherical technology, applied in the field of silicon, can solve problems such as no recurrence, and achieve the effect of reducing production costs
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Embodiment 1
[0027] Add 2.48g of aluminum isopropoxide and 5.82g of KOH (85%) to 37.96g of deionized water to form solution A, and stir for 0.5h to completely dissolve the aluminum source. Add 30.01 g of silica sol (40%), 2.55 g of ethylenediamine, and 6.01 g of cyclohexylamine into 30 g of deionized water, mix and stir evenly to form solution B. Then A solution and B solution were mixed and stirred for 1 h to form a white gel. The formed gel was transferred to a 170ml polytetrafluoroethylene reactor, dynamically rotated at a speed of 20r / min, and crystallized at 150°C for 4 days. The obtained sample was washed, dried at 120°C, and calcined at 550°C for 6 hours to obtain SUZ-4 molecular sieve with a crystallinity of 85%. Its XRD spectrum is attached figure 1 .
[0028] Initial gel molar composition: 33.3SiO 2 :Al 2 o 3 :14.7KOH:7EDA:10CHA:798H 2 o
Embodiment 2
[0030] Add 2.48g of aluminum isopropoxide and 5.82g of KOH (85%) to 37.96g of deionized water to form solution A, and stir for 0.5h to completely dissolve the aluminum source. Add 30.01 g of silica sol (40%), 2.19 g of ethylenediamine, and 6.01 g of cyclohexylamine into 30 g of deionized water, mix and stir evenly to form solution B. Then A solution and B solution were mixed and stirred for 1 h to form a white gel. The formed gel was transferred to a 170ml polytetrafluoroethylene reactor, dynamically rotated at a speed of 20r / min, and crystallized at 150°C for 4 days. The obtained sample was washed, dried at 120°C, and calcined at 550°C for 6 hours to obtain a pure SUZ-4 molecular sieve with a crystallinity of 98%, and a Si / Al ratio of 15.6 as measured by an X-ray fluorescence spectrometer. attached figure 2 The XRD spectrum of the sample obtained in this example is given. attached image 3 The SEM image of the sample obtained in this example is given.
[0031] Initial g...
Embodiment 3
[0033] Add 2.48g of aluminum isopropoxide and 5.82g of KOH (85%) to 37.96g of deionized water to form solution A, and stir for 0.5h to completely dissolve the aluminum source. Add 30.01 g of silica sol (40%), 1.82 g of ethylenediamine, and 6.01 g of cyclohexylamine into 30 g of deionized water, mix and stir evenly to form solution B. Then A solution and B solution were mixed and stirred for 1 h to form a white gel. The formed gel was transferred to a 170ml polytetrafluoroethylene reactor, dynamically rotated at a speed of 20r / min, and crystallized at 150°C for 4 days. The obtained sample was washed, dried at 120° C., and calcined at 550° C. for 6 hours. The spectrum of the sample in this experiment was the same as in Example 2, except that the crystallinity was 80%.
[0034] Initial gel molar composition: 33.3SiO 2 :Al 2 o 3 :14.7KOH:5EDA:10CHA:798H 2 o
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