A kind of synthetic method of nano-beta molecular sieve
A synthesis method and molecular sieve technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of difficult collection of products, excessive amount of template agent, etc., and achieve the effect of high crystallinity
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Embodiment 1
[0046] Preparation of macroporous carbon materials:
[0047] (a) Mix 150g of calcium carbonate with 5000mL of 0.05mol / L sodium hydroxide solution, stir at 70°C for 2h; then filter, and dry the obtained solid sample at 500°C for 2.5h;
[0048] (b) Add 7000 mL of distilled water and 300 g of sucrose to the calcium carbonate obtained in step (a), stir for 30 min and then ultrasonicate for 5 h.
[0049] (c) The solution prepared in step (b) was placed in a 70°C water bath and stirred to make the water evaporate until the solution became viscous; then dried at 70°C; finally, the sample was placed in a tube furnace and passed through Inject nitrogen gas at a flow rate of 20mL / min; raise the temperature from room temperature to 900°C at 11°C / min, and keep the temperature constant for 5h;
[0050] (d) Mix the substance obtained in step (c) with 5000mL of 50% hydrochloric acid solution evenly, treat at 140°C for 6h, finally wash with water until neutral, and dry at 100°C for 10h,
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Embodiment 2
[0053] (1) Dissolve 0.75g of sodium hydroxide in 50mL of distilled water, add 6mL of TEAOH after the dissolution is complete, add 0.45g of sodium aluminate after the dissolution is complete, stir vigorously until completely dissolved, then slowly add 5 g of white carbon black, and stir vigorously 30min;
[0054] (2) Mix the synthetic gel obtained in step (1) with 5.5 g of the macroporous carbon prepared in Example 1, ultrasonically treat it for 30 minutes, then stir it at 60°C until it becomes viscous, and then heat it at 110°C Dry until the water evaporates completely;
[0055] (3) Then put the mixture obtained in step (2) into the reactor, add 5 mL of water, then seal the reactor, and place the reactor in an oven for crystallization at 140°C for 60 hours. Then the solid product was filtered and washed to neutrality, dried at 100°C for 10 hours, and finally calcined at 500°C for 3 hours in an air atmosphere. The obtained sample number was CL1. figure 1 and figure 2 As sho...
Embodiment 3
[0057] (1) Dissolve 0.3 g of sodium hydroxide in 60 mL of distilled water, add 10 mL of TEAOH after complete dissolution, add 1 g of sodium aluminate after complete dissolution, and stir vigorously until completely dissolved. Add 11g of white carbon black slowly, and stir vigorously for 20min.
[0058] (2) Mix the synthetic gel obtained in step (1) with 15 g of the macroporous carbon prepared in Example 1, ultrasonically treat it for 30 minutes, then stir it at 70°C until it becomes viscous, and then dry it at 120°C until the water evaporates completely.
[0059] (3) Then put the mixture obtained in step (2) into the reactor, and then add 20 mL of water. Then the reactor was sealed, and the reactor was placed in an oven for crystallization at 150° C. for 45 h. Then the solid product was filtered and washed until neutral, dried at 100°C for 10 hours, and finally calcined at 500°C for 3 hours in an air atmosphere. The obtained sample number is CL2, which is a pure nano Beta mo...
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