Method for efficiently and rapidly synthesizing H-SSZ-13 type molecular sieve
A molecular sieve, fast technology, applied in separation methods, molecular sieve catalysts, molecular sieves and base exchange compounds, etc., can solve the problem of inability to realize direct one-step synthesis of H-SSZ-13 molecular sieve, limit the industrial production of SSZ-13 molecular sieve, and complex actual process conditions And other problems, to achieve excellent catalytic activity and anti-hydrothermal aging stability, wide industrial application prospects, low price effect
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Embodiment 1
[0036] A method for efficient and rapid synthesis of H-SSZ-13 type molecular sieve, comprising the following steps:
[0037] S1, the tetraethylammonium hydroxide, (NH 4 ) 2 SO 4 Add pure water in turn to mix, stir for 30 minutes to obtain a clear solution, then add aluminum sulfate, continue for 30 minutes, and stir to obtain mixed solution A;
[0038] S2. Slowly add ethyl orthosilicate to the mixed solution A obtained from S1, control the feeding time to 45min, continue stirring, age the mixed solution at 60°C for 2h, and then dry it at 100°C for 4h, and finally obtain a water-containing solution. Xerogel B with a rate of 6%;
[0039] S3. Transfer the xerogel B to a crystallization kettle with a tetrafluoroethylene lining, and use the water vapor-assisted crystallization method to raise the temperature from room temperature to 150°C at 4°C / min, and keep it for 12h;
[0040] S4. After the crystallization is completed, the crystallization kettle is cooled, the product is ta...
Embodiment 2
[0044] A method for efficient and rapid synthesis of H-SSZ-13 type molecular sieve, comprising the following steps:
[0045] S1, the benzyl trimethyl ammonium hydroxide, (NH 4 ) 2 SO 4 Add pure water in turn to mix, stir for 30 minutes to obtain a clear solution, then add aluminum sulfate, continue for 30 minutes, and stir to obtain mixed solution A;
[0046] S2. Slowly add fumed silica into the mixed solution A obtained in S1, control the feeding time to 45min, continue stirring, age the mixed solution at 60°C for 2h, and then dry it at 100°C for 4h, and finally obtain the moisture content is 6.5% xerogel B;
[0047] S3. Transfer the xerogel B to a crystallization kettle with a tetrafluoroethylene lining, and use the water vapor-assisted crystallization method to raise the temperature from room temperature to 160°C at 4°C / min, and keep it for 18h;
[0048] S4. After the crystallization is completed, the crystallization kettle is cooled, the product is taken out, the produ...
Embodiment 3
[0052] A method for efficient and rapid synthesis of H-SSZ-13 type molecular sieve, comprising the following steps:
[0053] S1, the choline chloride, NH 4 Cl was added to pure water and mixed, stirred for 30 min to obtain a clear solution, then added aluminum sulfate, continued for 30 min, and stirred to obtain mixed solution A;
[0054] S2. Slowly add the silica sol to the mixed solution A obtained in S1, control the feeding time to be 45 min, continue to stir, age the mixed solution at 60 °C for 4 hours, and then dry it at 100 °C for 4 hours, and finally obtain a water content of 6 % xerogel B;
[0055] S3. Transfer the xerogel B to a crystallization kettle with a tetrafluoroethylene lining, and use the water vapor-assisted crystallization method to raise the temperature from room temperature to 150°C at 4°C / min, and keep it for 24h;
[0056] S4. After the crystallization is completed, the crystallization kettle is cooled, the product is taken out, the product is ground a...
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