Metal pillared montmorillonite coated mesoporous silica composite material and preparation method thereof

Abstract

The present invention discloses a metal pillared montmorillonite coated mesoporous silica composite material and a preparation method thereof. The preparation method comprises the following steps: preparation of a metal pillared agent, namely slowly dropwise adding soluble metal salt into an aqueous solution of Na2CO3 or water with stirring, fully hydrolyzing at 60 to 80 DEG C and aging for 24 to 48 hours; preparation of a metal pillared montmorillonite suspension, namely adding the water into montmorillonite, stirring at room temperature to disperse the montmorillonite sufficiently, slowly dropwise adding the metal pillared agent into the montmorillonite suspension, reacting for 2 to 4 hours at the temperature of 60 to 80 DEG C, stopping stirring, standing for one night, washing, centrifuging, drying, and adding water to prepare the metal pillared montmorillonite suspension with the mass percentage of 20 to 30 percent; uniformly mixing the metal pillared montmorillonite suspension and a porous silicon material to obtain a mixture, and drying the mixture. The composite material prepared by adopting the method combines the properties of montmorillonite minerals and mesoporous materials, and can effectively reduce the emission amount of harmful components in cigarette smoke.

Description

technical field

[0001] The invention relates to a metal-pillared montmorillonite-coated mesoporous silicon composite material capable of effectively reducing the content of harmful components in flue gas and a preparation method thereof. Background technique

[0002] With the progress of society, smoking and environmental issues have attracted worldwide attention. The "Framework Convention on Tobacco Control" requires governments to formulate more stringent "tobacco control" laws and regulations, urging cigarette manufacturers to strictly control the release of major harmful components in cigarette smoke while reducing the amount of tar released from cigarettes. In 2009, the Zhengzhou Tobacco Research Institute led a study on the cigarette smoke hazard index of Chinese-style cigarettes, and selected seven representative components as cigarette hazard evaluation indicators, such as CO, HCN, NNK, B[a] P, phenol, etc. At the end of last century, due to its low cost and abunda...

Examples

Embodiment 1

[0022] Weigh 242.4 grams of Fe (NO 3 ) 3 .9H 2 O, add water to dissolve, stir at room temperature, slowly add 63.6 g of anhydrous sodium carbonate powder, add water to dilute to 2000 mL, continue stirring for 2 hours, and age in a constant temperature water bath at 60 ° C for 24 hours to obtain a brown transparent iron proppant .

[0023] Weigh 100 grams of commercially available purified montmorillonite, add 2000 mL of water to make a suspension, add 350 ml of iron proppant dropwise under constant temperature stirring at 60 °C, react for another 2 hours, and then age at 60 °C for 24 hours , and then washed, centrifuged, and dried to prepare iron-pillared montmorillonite.

[0024] Weigh 200g of iron-pillared montmorillonite, add water to make a 30wt% suspension, add 1800g of 40-80 mesh mesoporous silicon, stir evenly, and dry at 100°C to obtain iron-pillared montmorillonite-coated mesoporous silicon Composites 1. The obtained composite material 1 was added to the filter t...

Embodiment 2

[0029] Weigh 400g of iron-pillared montmorillonite in Example 1, add water to form a 30wt% suspension, add 1600g of 40-80 mesh mesoporous silicon, stir evenly, and dry at 100°C to obtain iron-pillared montmorillonite Composite material 2 coated with mesoporous silicon. The composite material 2 was added to the filter according to the method of Example 1 to prepare a binary composite filter. The test results are shown in Table 2.

[0030] Table 2:

[0031]

Embodiment 3

[0033] Weigh 600g of the iron-pillared montmorillonite of Example 1, add water to form a 30wt% suspension, add 1400g of 40-80 mesh mesoporous silicon, stir evenly, and dry at 100°C to obtain the iron-pillared montmorillonite package Composite materials coated with mesoporous silicon 3. The test results are shown in Table 3.

[0034] table 3:

[0035]

technical field

[0001] The invention relates to a metal-pillared montmorillonite-coated mesoporous silicon composite material capable of effectively reducing the content of harmful components in flue gas and a preparation method thereof. Background technique

[0002] With the progress of society, smoking and environmental issues have attracted worldwide attention. The "Framework Convention on Tobacco Control" requires governments to formulate more stringent "tobacco control" laws and regulations, urging cigarette manufacturers to strictly control the release of major harmful components in cigarette smoke while reducing the amount of tar released from cigarettes. In 2009, the Zhengzhou Tobacco Research Institute led a study on the cigarette smoke hazard index of Chinese-style cigarettes, and selected seven representative components as cigarette hazard evaluation indicators, such as CO, HCN, NNK, B[a] P, phenol, etc. At the end of last century, due to its low cost and abunda...

Examples

Embodiment 1

[0022] Weigh 242.4 grams of Fe (NO 3 ) 3 .9H 2 O, add water to dissolve, stir at room temperature, slowly add 63.6 g of anhydrous sodium carbonate powder, add water to dilute to 2000 mL, continue stirring for 2 hours, and age in a constant temperature water bath at 60 ° C for 24 hours to obtain a brown transparent iron proppant .

[0023] Weigh 100 grams of commercially available purified montmorillonite, add 2000 mL of water to make a suspension, add 350 ml of iron proppant dropwise under constant temperature stirring at 60 °C, react for another 2 hours, and then age at 60 °C for 24 hours , and then washed, centrifuged, and dried to prepare iron-pillared montmorillonite.

[0024] Weigh 200g of iron-pillared montmorillonite, add water to make a 30wt% suspension, add 1800g of 40-80 mesh mesoporous silicon, stir evenly, and dry at 100°C to obtain iron-pillared montmorillonite-coated mesoporous silicon Composites 1. The obtained composite material 1 was added to the filter t...

Embodiment 2

[0029] Weigh 400g of iron-pillared montmorillonite in Example 1, add water to form a 30wt% suspension, add 1600g of 40-80 mesh mesoporous silicon, stir evenly, and dry at 100°C to obtain iron-pillared montmorillonite Composite material 2 coated with mesoporous silicon. The composite material 2 was added to the filter according to the method of Example 1 to prepare a binary composite filter. The test results are shown in Table 2.

[0030] Table 2:

[0031]

Embodiment 3

[0033] Weigh 600g of the iron-pillared montmorillonite of Example 1, add water to form a 30wt% suspension, add 1400g of 40-80 mesh mesoporous silicon, stir evenly, and dry at 100°C to obtain the iron-pillared montmorillonite package Composite materials coated with mesoporous silicon 3. The test results are shown in Table 3.

[0034] table 3:

[0035]

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