Preparation method of hierarchical pore AFI structured aluminum phosphate molecular sieve
An aluminum phosphate molecular sieve and multi-stage pore technology, which is applied in the direction of molecular sieve characteristic silicoaluminophosphate, molecular sieve and alkali-exchanged phosphate, can solve the problems of imperfect preparation methods of multi-stage pore molecular sieves, long crystallization time of molecular sieves, etc., and achieve The effect of low synthesis cost, environmental friendliness, safe and convenient operation
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[0033] Example one
[0034] Mix 16.5g 1-butyl-3-methylimidazole bromide ionic liquid, 0.44g aluminum isopropoxide, 0.05g 40wt% hydrofluoric acid and 0.75g 85wt% phosphoric acid at 90°C, 0.5g of n-propylamine was stirred until uniform to obtain the pre-reaction mixture. The reaction mixture was transferred to a stainless steel reactor with a polytetrafluoroethylene lining, and then placed in a 150°C oven for crystallization. After crystallization for 10 hours, the reactor was taken out, and the reactor was cooled, and then the reaction mixture was added to 150ml of deionized water. Stir, ultrasonically wash, filter the reactant to obtain a white solid powder, repeat the washing three times, and wash the white powder with 50 ml of ethanol. The final white powder was dried in an oven at 110°C, and the XRD test confirmed that the white powder was the original powder of AFI structure aluminum phosphate molecular sieve. In a rotary evaporator, the water and solvent in the washed filt...
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[0035] Example two
[0036] At 80°C, 33g 1-butyl-3-methyl imidazole bromide ionic liquid, 0.88g aluminum isopropoxide, 1.5g phosphoric acid with a concentration of 85wt%, 0.05g hydrofluoric acid with a concentration of 40wt%, and 0.4g Ethanolamine is mixed and stirred until uniform to obtain the pre-reaction mixture. The reaction mixture was transferred to a stainless steel reactor with a polytetrafluoroethylene lining, and then placed in an oven at 150°C for crystallization. After 6 hours of crystallization, the reactor was taken out, the reactor was cooled, and then 200ml of deionized water was added to the reaction mixture. After ultrasonic washing, the reactant was filtered to obtain a white solid powder, and the washing was repeated three times, and the white powder was washed with 50 ml of ethanol. The final white powder was dried in an oven at 110°C, and XRD confirmed that the white powder was the original powder of AFI structure aluminum phosphate molecular sieve. In a ...
Example Embodiment
[0037] Example three
[0038] At 80°C, 20g 1-butyl-3-methyl imidazole bromide ionic liquid, 1.0g aluminum isopropoxide, 1.8g phosphoric acid with a concentration of 85wt%, 0.05g hydrofluoric acid with a concentration of 40wt% and 0.5g Ethanolamine is mixed and stirred until uniform to obtain the pre-reaction mixture. The reaction mixture was transferred to a stainless steel reactor with a polytetrafluoroethylene lining, and then placed in a 160°C oven for crystallization. After 4 hours of crystallization, the reactor was taken out, the reactor was cooled, and then 300ml of deionized water was added to the reaction mixture. After ultrasonic washing, the reactant was filtered to obtain a white solid powder, and the washing was repeated three times, and the white powder was washed with 50 ml of ethanol. The final white powder was dried in an oven at 110°C. The XRD test confirmed that the white powder was the original powder of AFI structure magnesium aluminum phosphate molecular si...
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