Method for preparing ordered mesoporous material Al-MCM-41 through attapulgite
A technology of attapulgite and mesoporous materials, applied in chemical instruments and methods, molecular sieve compounds, inorganic chemistry, etc., can solve problems such as low comprehensive utilization level, and achieve the effects of cheap raw materials, loose preparation conditions and high utilization rate
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Embodiment 1
[0029] Weigh 4 parts of 20g attapulgite clay, soak in 80ml of 6mol / L HCl at 60°C for 12h, filter with suction, wash with deionized water repeatedly until neutral, and dry at 80°C to obtain 18.2g of acidified attapulgite. Weigh 4 parts of 10g acidified attapulgite, grind with 15g NaOH solid, mix well, and bake at 600°C for 5h. Transfer the roasted mixture to a stirred container, add 65ml of deionized water, and stir for 24 hours to fully dissolve the soluble aluminosilicate in it, and take the leachate from the upper layer as the silicon-aluminum source for later use.
[0030] The above 4 parts of silicon and aluminum sources were respectively added to the solutions containing 0.5 g, 1.0 g, 3.0 g and 5.0 g of surfactant CTAB. The pH of the above mixed solution was adjusted to 5 with 0.1 mol / L HCl, stirred for 1 hour, and transferred to 4 high-pressure reactors respectively. Hydrothermal crystallization at a temperature of 110°C for 12 hours to obtain a precursor, the precursor...
Embodiment 2
[0032] According to the same method in Example 1, 4 parts of useful silicon-aluminum sources in activated attapulgite were extracted respectively. The above 4 parts of silicon and aluminum sources were respectively added into the solution containing 1.0 g of surfactant CTAB. 0.1 mol / L HCl was used to adjust the above mixed solution to pH=3, pH=5, pH=7, pH=9. After stirring for 1 h, they were transferred to 4 high-pressure reactors. Hydrothermal crystallization at a temperature of 110°C for 12 hours to obtain a precursor, the precursor was suction filtered, washed, dried, and roasted at 550°C to remove the surfactant, and the Al-MCM-41 ordered mesoporous material was prepared 5-8 #, whose surface properties are shown in Table 1.
Embodiment 3
[0034]According to the same method in Example 1, 4 parts of useful silicon-aluminum sources in activated attapulgite were extracted respectively. The above 4 parts of silicon and aluminum sources were respectively added into the solution containing 1.0 g of surfactant CTAB. The pH of the above mixed solution was adjusted to 5 with 0.1 mol / L HCl. After stirring for 1 h, they were transferred to 4 high-pressure reactors. Hydrothermal crystallization at 60, 110, 160, and 210°C for 12 hours to obtain a precursor, which was filtered, washed, dried, and roasted at 550°C to remove the surfactant, and then Al-MCM-41 was obtained. Sequenced mesoporous materials 9~12#, and their surface properties are shown in Table 1.
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