Heteroatom zeolite adsorbent and preparation method thereof
A technology of heteroatom molecular sieve and adsorbent, which is applied in the field of heteroatom molecular sieve adsorbent and its preparation, can solve the problems of low adsorption capacity, poor regeneration stability, and low purification precision of adsorbent, and achieve good reproducibility and good technical effect Effect
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Embodiment 1
[0030] Contains Ce 3+ and Ni 2+ The preparation process of two ion-exchanged NaY molecular sieves and a shaped adsorbent with activated alumina as a binder is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 10. Subsequently, Ce(NO 3 ) 3 Solution 100 ml, the above 10 g NaY molecular sieve powder was added to 100 ml Ce(NO 3 ) 3 solution, that is, according to the solid-liquid ratio of 1:10, at 90 o C, fully stirred, exchanged for 6 hours. Filter and rinse with deionized water. Repeat the above operation three times. The same method was used to prepare Ni(NO 3 ) 2 solution, according to the solid-liquid ratio of 1:3, at 50 o C, fully stirred, exchanged for 12 hours, carried out ion exchange three times according to this condition, and obtained the exchanged molecular sieve precursor after drying. Then, weigh 10g of alumina powder, take alumina as a binder, and let it dry naturally, in the air at 550 o C, bak...
Embodiment 2
[0034] Contains Ce 3+ 、Ni 2+ and Cu 2+ The preparation process of three ion-exchanged NaY molecular sieves and a shaped adsorbent with activated alumina as a binder is as follows. First, accurately weigh 10 g of NaY molecular sieve raw powder with a silicon-aluminum ratio of 10. Subsequently, Ce(NO 3 ) 3 Solution 200 ml, the above-mentioned NaY molecular sieve powder was added to 200 ml Ce(NO 3 ) 3 solution, that is, according to the solid-liquid ratio of 1:20, at 20 o C, fully stirred, exchanged for 80 hours. Filter and rinse with deionized water. Repeat the above operation twice. The same method was used to prepare Ni(NO 3 ) 2 Solution, according to the solid-liquid ratio of 1:3, at 150 o C, fully stirred, exchanged for 2 hours, and carried out four times of ion exchange according to the above conditions. Thereafter, Cu(NO 3 ) 2 Solution, according to the solid-liquid ratio of 1:5, at 150 o C, fully stirred, and exchanged for 2 hours, after that, an ion-excha...
Embodiment 3
[0037] Contains Ce 3+ 、Ni 2+ 、Cu 2+ and Zn 2+ Preparation of four ion-exchanged NaY molecular sieves and shaped adsorbents bound by activated alumina. The preparation of the adsorbent was carried out in the same manner as in Example 2. Only in the exchange process, Ce(NO 3 ) 3 Solution 30 ml, that is, change the solid-liquid ratio to 1:3, at 120 o C, with vigorous stirring, exchanged for 4 hours, and performed three exchanges. Carry out Ni in turn according to the same conditions 2+ 、Cu 2+ exchange. After Ni(NO 3 ) 2 , Cu(NO 3 ) 2 After exchange, under the same conditions, with 0.6 mol / L Zn(NO 3 ) 2 The solution was exchanged for 5 hours at a solid-to-liquid ratio of 1:5, and the exchanged molecular sieve precursor was obtained after drying. Then, weigh 10g of alumina powder, take alumina as a binder, and let it dry naturally, in the air at 550 o C, baked for 2 hours. Grind and sieve to take 10 to 20 mesh, in 300 o C drying until the quality is no longer r...
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