Method for synthesizing ultra-stable ordered mesoporous Si-Al molecular sieve
A technology of mesoporous molecular sieve and mesoporous silica-alumina, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problem that the hydrothermal stability of molecular sieve is not as good as that of microporous zeolite, and achieve the effect of high condensation degree and strong hydrothermal stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0026] Add 1.44 g of tetrapropylammonium bromide into deionized water at room temperature. After it is completely dissolved, add tetraethyl orthosilicate, sodium aluminate and deionized water to the solution, so that the moles of each reactant Ratio: TPA + / Al 2 o 3 / SiO 2 / Na 2 O / H 2 O=1:0.055:2.58:0.057:316.5. The above solution was stirred at 25° C. for 24 hours to obtain a ZSM-5 type precursor. Add 90 ml of deionized water to the prepared ZSM-5 precursor, and stir at 25° C. for 2 hours to obtain a dilution of the ZSM-5 precursor. Next, 3 grams of calcined SBA-15 was added to the diluted solution of the precursor, and stirred at 25° C. for 1 hour, and then the reaction mixture was placed at 130° C. for constant temperature crystallization for 24 hours. After the product obtained from the first crystallization was filtered, washed and dried for 24 hours, it was suspended in 10.0 ml of glycerin and crystallized at a constant temperature of 130° C. for 48 hours. Finall...
Embodiment 2
[0030] Add 1.14 g of tetraethylammonium bromide into deionized water at room temperature. After it is completely dissolved, add tetraethylorthosilicate, sodium aluminate and deionized water to the solution, so that the moles of each reactant Ratio: TEA + / Al 2 o 3 / SiO 2 / Na 2 O / H 2 O=1:0.055:2.58:0.057:316.5. The above solution was stirred at 25° C. for 24 hours to obtain a Beta type precursor. Add 90 ml of deionized water to the prepared Beta precursor, and stir at 25° C. for 2 hours to obtain a dilution of the Beta precursor. Next, 3 grams of calcined SBA-15 was added to the diluted solution of the precursor, and stirred at 25° C. for 1 hour, and then the reaction mixture was placed at 130° C. for constant temperature crystallization for 24 hours. After the product obtained from the first crystallization was filtered, washed and dried for 24 hours, it was suspended in 10.0 ml of glycerin and crystallized at a constant temperature of 130° C. for 48 hours. Finally, th...
Embodiment 3
[0034] Add 1.44 g of tetrapropylammonium bromide into deionized water at room temperature. After it is completely dissolved, add tetraethyl orthosilicate, sodium aluminate and deionized water to the solution, so that the moles of each reactant Ratio: TPA + / Al 2 o 3 / SiO 2 / Na 2 O / H 2 O=1:0.275:2.58:0.285:316.5. The above solution was stirred at 25° C. for 24 hours to obtain a ZSM-5 type precursor. Add 90 ml of deionized water to the prepared ZSM-5 precursor, and stir at 25° C. for 1 hour to obtain a dilution of the ZSM-5 precursor. Next, 3 grams of calcined SBA-15 was added to the diluted solution of the precursor, and stirred at 25° C. for 1 hour, and then the reaction mixture was placed at 130° C. for constant temperature crystallization for 36 hours. After the first crystallization product was filtered, washed and dried for 24 hours, it was suspended in 7.5 ml of glycerin and crystallized at a constant temperature of 130°C for 48 hours. Finally, the product obtaine...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More