Renewable microporous-mesoporous composite adsorbent and its preparation method and application
A technology of composite materials and adsorbents, applied in chemical instruments and methods, adsorption purification/separation, ethylene production, etc., can solve the problems of pending development, undeveloped research, low preparation efficiency of mesoporous-microporous zeolite materials, etc., to achieve Long service life, low adsorption heat effect, and shortened synthesis time
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Embodiment 1
[0051] Mix 2 parts of sodium hydroxide, 1 part of alumina, and 10 parts of water to prepare sodium aluminate, then add 0.01 part of cetyltrimethylammonium bromide, and stir and mix for 4 hours. Add 50 parts of water and 1 part of aluminum nitrate solution, stir at 25°C for 12 hours, and age at room temperature for 24 hours to obtain solution A; weigh 1.5 parts of FAU molecular sieve, add 10 parts of 2.5mol / L sodium hydroxide The solution was ultrasonically treated for 30 minutes to obtain solution B; solution A and solution B were mixed at room temperature, and microwave crystallized at 90°C for 50 minutes, washed and dried to obtain product M1.
Embodiment 2
[0053] The difference from Example 1 is that the solid FAU secondary unit B of the treated FAU molecular sieve is obtained by drying the FAU molecular sieve after ultrasonic treatment with alkali. Then solutions A and B were mixed at room temperature, and microwave crystallized at 90° C. for 50 min, washed and dried to obtain product M2.
Embodiment 3
[0055] Mix 3 parts of sodium aluminate, 100 parts of water, and 0.1 part of P123 template at room temperature for 6 hours, then add 1 part of aluminum nitrate and 177 parts of water, and stir for 12 hours at room temperature to obtain solution A; weigh 1 part of FAU type molecular sieve, add 10 parts of 3.0mol / L NaOH solution, ultrasonic treatment for 10min, then add 10 parts of isopropanol, and treat it under ultrasonic for 20min to obtain solution B; mix solution A and solution B, and stir at room temperature for 12h , followed by microwave crystallization at 95° C. for 60 min, centrifugation, washing and drying to obtain the product M3.
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