A kind of ZSM-48 molecular sieve with low silicon-aluminum ratio and preparation method thereof
A low-silicon-aluminum ratio and molecular sieve technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of shortening the crystallization time, achieve the effects of reducing the silicon-aluminum ratio, increasing the acid content, and good application prospects
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Embodiment 1
[0020] (1) Weigh sodium hydroxide and sodium aluminate (Al 2 o 3 , 43wt%; Na 2 O, 38wt%) was dissolved in deionized water, and then the templating agent R (12-crown-4, content >97%) was added while stirring at a water bath temperature of 60°C, and after stirring for 0.5 hours, white carbon black was added, After stirring for 1 hour, add seed crystal S, continue stirring for 2 hours, and then move to a closed stainless steel reaction kettle.
[0021] (2) Crystallized at 160°C for 6 days, the obtained crystallized product was analyzed as ZSM-48 molecular sieve by XRD analysis, the specific raw material ratio and product properties are shown in Table 1.
Embodiment 2
[0023] (1) Same as step (1) of Example 1.
[0024] (2) Crystallized at 158°C for 8 days, the obtained crystallized product was analyzed as ZSM-48 molecular sieve by XRD analysis, the specific raw material ratio and product properties are shown in Table 1.
Embodiment 3
[0026] (1) Same as step (1) of Example 1, the temperature of the water bath is 80°C.
[0027] (2) Crystallize at 160°C for 5 days, and the obtained crystallized product is ZSM-48 molecular sieve by XRD analysis. The specific raw material ratio and product properties are shown in Table 1.
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