A kind of preparation method of mfi-lta molecular sieve monolayer composite membrane
A molecular sieve and composite membrane technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of easy-off membrane performance, weakening, and loss of functional components, achieve a reliable technical route and theoretical basis, improve membrane-forming efficiency, and improve The effect of the degree of crosslinking
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Embodiment 1
[0044] (1) Add 0.1g of Al2O3 powder, 0.3g of Silicalite-I seed powder with a particle size of 500nm, and 1g of NaA molecular sieve powder with a particle size of 5μm into 100g of deionized water, and ultrasonically disperse for 30min;
[0045] (2) Put the aluminum alloy substrate in the acetone and ethanol solutions respectively, after ultrasonication for 30 minutes, take it out, and let it dry naturally;
[0046] (3) Spin-coat the surface of the aluminum alloy substrate obtained in step (2), and the amount of coating solution is 10d / cm 2 , the spin coating time is 45s, and the rotation speed is 3000r / min;
[0047] (4) Mix 1.8ml of tetrapropylammonium hydroxide and 43.4ml of deionized water and stir for 30 minutes, add 0.043g of aluminum nitrate nonahydrate and mix and stir for 30 minutes, then continue to add ethyl orthosilicate and stir for 24 hours to obtain the film-forming mother liquor;
[0048] (5) The coated surface of the aluminum alloy substrate obtained in step (3)...
Embodiment 2
[0055] (1) Add 0.2g of Al2O3 powder, 0.3g of Silicalite-I seed powder with a particle size of 500nm, and 1g of NaA molecular sieve powder with a particle size of 5μm into 100g of deionized water, and ultrasonically disperse for 30min;
[0056] (2) Put the aluminum alloy substrate in the acetone and ethanol solutions respectively, after ultrasonication for 30 minutes, take it out, and let it dry naturally;
[0057] (3) Spin-coat the surface of the aluminum alloy substrate obtained in step (2), and the amount of coating solution is 10d / cm 2 , the spin coating time is 45s, and the rotation speed is 3000r / min;
[0058] (4) Mix 1.8ml of tetrapropylammonium hydroxide and 43.4ml of deionized water and stir for 30 minutes, add 0.043g of aluminum nitrate nonahydrate and mix and stir for 30 minutes, then continue to add ethyl orthosilicate and stir for 24 hours to obtain the film-forming mother liquor;
[0059] (5) The coated surface of the aluminum alloy substrate obtained in step (3)...
Embodiment 3
[0062] (1) Add 0.1g of Al2O3 powder, 0.5g of Silicalite-I seed powder with a particle size of 500nm, and 1g of NaA molecular sieve powder with a particle size of 5μm into 100g of deionized water, and ultrasonically disperse for 30 minutes;
[0063] (2) Put the aluminum alloy substrate in the acetone and ethanol solutions respectively, after ultrasonication for 30 minutes, take it out and dry it naturally;
[0064] (3) Spin-coat the surface of the aluminum alloy substrate obtained in step (2), and the amount of coating solution is 10d / cm 2 , the spin coating time is 45s, and the rotation speed is 2000r / min;
[0065] (4) Mix 1.8ml of tetrapropylammonium hydroxide and 43.4ml of deionized water and stir for 30 minutes, add 0.043g of aluminum nitrate nonahydrate and mix and stir for 30 minutes, then continue to add ethyl orthosilicate and stir for 24 hours to obtain a film-forming mother liquor;
[0066] (5) The coated surface of the aluminum alloy substrate obtained in step (3) i...
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