Nanoscale sheet-SAPO-34 molecular sieve and synthetizing method thereof
A SAPO-34, nano-scale technology, applied in the direction of molecular sieve characteristic silicoaluminophosphate, molecular sieve and alkali-exchanged phosphate, etc., can solve the problems of complex synthesis method and high cost of SAPO-34 molecular sieve, and shorten the molecular diffusion path and reduce the cost. The effect of increased rate and simple process
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[0023] Example 1 Pseudo-boehmite, phosphoric acid, ammonium dihydrogen phosphate, white carbon black, cetyltrimethylammonium bromide and water were added to a three-necked flask, a condenser was connected to the three-necked flask, and the above mixture was placed in an oil bath. The reaction was stirred and refluxed at 75°C for 24 hours. Then, triethylamine was added to the three-necked flask, and the stirring reaction was continued at room temperature (25° C.) for 4 hours. with Al 2 O 3 Calculated pseudo-boehmite, with P 2 O 5 Phosphoric acid and ammonium dihydrogen phosphate in terms of SiO 2 The calculated molar ratio of silica, cetyltrimethylammonium bromide, triethylamine and water is 1:1:0.3:0.1:3:100. Wherein, the molar ratio of phosphoric acid to ammonium dihydrogen phosphate is 4:1. The obtained sol was put into a hydrothermal reactor and crystallized at 200°C for 50 hours. The mixture obtained by crystallization was filtered, the obtained solid was washed w...
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[0025] Example 2 Pseudo-boehmite, phosphoric acid, ammonium dihydrogen phosphate, silica sol, cetyltrimethylammonium bromide and water were added to the there-necked flask, a condenser was connected to the there-necked flask, and the above mixture was placed in an oil bath. The reaction was stirred and refluxed at 50°C for 48 hours. Then, triethylamine was added to the three-necked flask, and the stirring reaction was continued at room temperature (25° C.) for 12 hours. with Al 2 O 3 Calculated pseudo-boehmite, with P 2 O 5 Phosphoric acid and ammonium dihydrogen phosphate in terms of SiO 2 The calculated molar ratio of silica sol, cetyltrimethylammonium bromide, triethylamine and water is 1:0.8:0.2:0.1:3:100. Wherein, the molar ratio of phosphoric acid to ammonium dihydrogen phosphate is 10:1. The obtained sol was put into a hydrothermal reactor and crystallized at 200°C for 50 hours. The mixture obtained by crystallization was filtered, the obtained solid was washed...
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[0027] Example 3 Pseudo-boehmite, phosphoric acid, ammonium dihydrogen phosphate, silica sol, cetyltrimethylammonium bromide and water were added to a three-necked flask, and the reaction was stirred and refluxed at 80° C. in an oil bath for 36 hours. Then, triethylamine was added to the three-necked flask as a templating agent, and the stirring reaction was continued for 8 hours at room temperature (25° C.). with Al 2 O 3 Calculated pseudo-boehmite, with P 2 O 5 Phosphoric acid and ammonium dihydrogen phosphate in terms of SiO 2 The calculated molar ratio of silica sol, cetyltrimethylammonium bromide, triethylamine and water is 1:1.2:1:0.2:4:50. Wherein, the molar ratio of phosphoric acid to ammonium dihydrogen phosphate is 1:1. The obtained sol was put into a hydrothermal reactor and crystallized at 220° C. for 10 hours. The mixture obtained by crystallization was filtered, the obtained solid was washed with deionized water at room temperature (25°C), dried at 120°C ...
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