Hierarchical pore zeolite molecular sieve and preparation method thereof
A technology of zeolite molecular sieve and channel, which is applied in the field of zeolite molecular sieve synthesis, can solve the problems of increasing the synthesis cost and limiting application of new zeolite molecular sieves, and achieves the effect of good development prospects
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Embodiment 1
[0024] A preparation method of a novel aluminosilicate zeolite molecular sieve with multi-stage channels, comprising the following steps:
[0025] (1) 0.306g amorphous SiO 2 Powder, 0.07g amorphous aluminum hydroxide powder, 1.622g water and 1ml templating agent are stirred evenly until aluminosilicate gel is formed. The selected templating agent is trimethylcyclohexyl ammonium.
[0026] (2) Transfer the aluminosilicate gel to a hydrothermal reaction kettle, and conduct hydrothermal crystallization at 100° C. for 30 days.
[0027] (3) After the product is cooled to room temperature, centrifugation is carried out, and the centrifuged product obtained is washed with deionized water, centrifuged again, and dried to obtain a zeolite molecular sieve.
[0028] Such as figure 1 The shown XRD results show that the zeolite molecular sieve prepared in Example 1 has characteristic peaks located at 7.52°, 8.84°, 18.9°, 20.92° and 22.96° respectively. 2 The full microporous physical ad...
Embodiment 2
[0030] A preparation method of a novel aluminosilicate zeolite molecular sieve with multi-stage channels, comprising the following steps:
[0031] (1) Stir 1.324g silica sol, 0.049g sodium metaaluminate, 1.622g water and 1ml templating agent until the aluminosilicate gel is formed. The selected templating agent is selected dimethyl propyl cyclohexyl ammonium.
[0032] (2) Transfer the aluminosilicate gel to a hydrothermal reaction kettle, and conduct hydrothermal crystallization at 170° C. for 3 days.
[0033] (3) Cool the product after hydrothermal crystallization to room temperature and perform a centrifugal separation. The obtained primary centrifuged product is washed with deionized water and centrifuged again to obtain a secondary centrifuged product. After the secondary centrifuged product is dried, the zeolite can be obtained Molecular sieve.
[0034] The zeolite molecular sieve has a microporous-mesoporous hierarchical pore structure, such as figure 2 As shown in t...
Embodiment 3
[0036] (1) Stir 1.063g tetraethyl orthosilicate, 0.092g alumina, 1.567g water and 1ml templating agent evenly until aluminosilicate gel is formed. The selected templating agent is trimethylisopropylammonium.
[0037] (2) Transfer the aluminosilicate gel into a hydrothermal reaction kettle, and conduct hydrothermal crystallization at 120° C. for 21 days.
[0038] (3) The hydrothermal crystallization product is cooled to room temperature and then centrifuged. The centrifuged product obtained is washed with deionized water and then centrifuged again. The zeolite molecular sieve can be obtained after the second centrifuged product is dried.
[0039] Such as image 3 The shown XRD results show that the zeolite molecular sieve prepared in Example 1 has characteristic peaks located at 7.52°, 8.84°, 18.9°, 20.92° and 22.96° respectively. 2 Fully microporous physical adsorption test, the obtained zeolite molecular sieve has micropore-mesopore multi-level channels, micropore diameter ...
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