A three-dimensional ordered pore structure zeolite molecular sieve and its preparation method
A zeolite molecular sieve, three-dimensional ordered technology, applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminosilicate zeolite, etc., can solve the problem that cannot meet the needs of industrial catalytic reactions, materials Poor stability, low acid catalytic activity and other problems, to achieve the effect of easy large-scale popularization and application, low cost and simple preparation method
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Embodiment 1
[0027] Add 8mL of styrene, 600mL of water, and 0.12g of sodium dodecylsulfonate into a 1L three-neck flask in turn, heat and stir at 60°C, and pass through N 2 Air was removed for 30 minutes, and then, 0.33 g of potassium persulfate initiator was dissolved in 10 mL of water, heated at 60°C and added to the above-mentioned round bottom flask, heated and stirred at 60°C for 18 hours. The obtained PS spheres were filtered with glass wool to remove aggregates, and then the filtered PS sphere suspension was centrifuged at 5000 rpm for 12 h, and the obtained precipitate was dried to obtain ~50 nm PS spheres.
[0028] ethanol, HNO 3 (0.3mol·L -1 ) and tetraethyl orthosilicate in a mass ratio of 20:0.2:1, stirred at room temperature to form a sol, added ~50nm PS balls, wherein the mass ratio of PS balls to tetraethyl orthosilicate was 1, fully infiltrated, suction filtered, and dried. Get SiO 2 -PS sphere composite; the SiO 2 -PS ball composite material added to 25wt% tetrapropyl...
Embodiment 2
[0031] Add 140mL styrene, 600mL water, and 0.12g sodium dodecylsulfonate into a 1L three-neck flask in turn, heat and stir at 90°C, and pass N 2 Air was removed for 30 minutes, and then, 0.33 g of potassium persulfate initiator was dissolved in 10 mL of water, heated at 90°C and added to the above-mentioned round bottom flask, heated and stirred at 90°C for 18 hours. The obtained PS spheres were filtered with glass wool to remove aggregates, and then the filtered PS sphere suspension was centrifuged at 5000 rpm for 12 h, and the obtained precipitate was dried to obtain ~700 nm PS spheres.
[0032] ethanol, HNO 3 (0.3mol·L -1 ) and tetraethyl orthosilicate at a mass ratio of 20:5:30, stirred at room temperature to form a sol, added ~700nm PS balls, wherein the mass ratio of PS balls to tetraethyl orthosilicate was 1, fully infiltrated, suction filtered, and dried. Get SiO 2 -PS sphere composite; the SiO 2 -PS ball composite material added to 40wt% tetrapropylammonium hydro...
Embodiment 3
[0035] Add 36.6mL of styrene, 600mL of water, and 0.12g of sodium dodecylsulfonate into a 1L three-necked flask in turn, heat and stir at 60°C, and pass through N 2 30min to remove the air. Then, 0.33g of potassium persulfate initiator was dissolved in 10mL of water, heated at 60°C and added to the above-mentioned round bottom flask, heated and stirred at 60°C for 18h. The obtained PS spheres were filtered with glass wool to remove aggregates, and then the filtered PS sphere suspension was centrifuged at 5000 rpm for 12 h, and the obtained precipitate was dried to obtain ~200 nm PS spheres.
[0036] ethanol, HNO 3 (0.3mol·L -1 ) and tetraethyl orthosilicate at a mass ratio of 1:5:1, stirred at room temperature to form a sol, added ~200nm PS balls, wherein the mass ratio of PS balls to tetraethyl orthosilicate was 1, fully infiltrated, suction filtered, and dried. Get SiO 2 -PS sphere composite; the SiO 2 -PS ball composite material added to 25wt% tetrapropylammonium hydrox...
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