Method for large-scale preparation of mesoporous silica

A large-scale preparation technology of mesoporous silica, applied in the direction of silica, silicon oxide, chemical instruments and methods, etc., can solve the problems of no literature and patent reports on mesoporous silica, and achieve large industrialization potential , low price, concentrated pore size distribution

Active Publication Date: 2016-04-20
华东理工常熟研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the applicant searched through a large number of literature and domestic and foreign patents, but found no literature or patent reports that can use fly ash to prepare mesoporous silica on a large scale

Method used

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  • Method for large-scale preparation of mesoporous silica
  • Method for large-scale preparation of mesoporous silica
  • Method for large-scale preparation of mesoporous silica

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Including the following steps:

[0040] 1. According to the mass ratio of the sodium-containing additive to the F-class fly ash is 0.3, weigh the fly ash and the sodium-containing additive;

[0041] 2. The fly ash mixed with the ball mill and the sodium-containing additives are baked at a temperature of 1100°C, kept for 30 minutes, taken out, and cooled to room temperature;

[0042] 3. After roasting, mix the material with 5% hydrochloric acid and react at a temperature of 95°C for 60 minutes;

[0043] 4. After the reaction, the solid-liquid mixture is separated by filtration, and the solid powder obtained by filtration is dried at a temperature of 60°C;

[0044] 5. Nitrogen isothermal adsorption / desorption test was carried out on the prepared mesoporous silica, and the pore size distribution curve was obtained as follows: figure 1 shown.

Embodiment 2

[0046] Including the following steps:

[0047] 1. According to the mass ratio of the calcium-containing additive to the F-class fly ash of 0.5, weigh the fly ash and the calcium-containing additive;

[0048] 2. Put the mixed fly ash and calcium-containing additives into the ball mill for roasting at 1350°C, keep it warm for 120 minutes, take it out, and cool to room temperature;

[0049] 3. After roasting, mix the material with 30% hydrochloric acid and react at a temperature of 20°C for 10 minutes;

[0050] 4. After the reaction is finished, the solid-liquid mixture is separated by filtration, and the solid powder obtained by filtration is dried at a temperature of 200°C;

[0051] 5. Nitrogen isothermal adsorption / desorption test was carried out on the prepared mesoporous silica, and the pore size distribution curve was obtained as follows: figure 2 shown.

Embodiment 3

[0053] 1. According to the mass ratio of calcium-containing additives and F-class fly ash is 0.3, weigh fly ash and calcium-containing additives;

[0054] 2. The fly ash and sodium-containing additives mixed by the ball mill are roasted at a temperature of 1100°C, kept for 120 minutes, taken out, and cooled to room temperature;

[0055] 3. After roasting, mix the material with 30% hydrochloric acid and react at a temperature of 95°C for 60 minutes;

[0056] 4. After the reaction is finished, the solid-liquid mixture is separated by filtration, and the solid powder obtained by filtration is dried at a temperature of 200°C;

[0057] 5. Nitrogen isothermal adsorption / desorption test was carried out on the prepared mesoporous silica, and the pore size distribution curve was obtained as follows: image 3 shown.

[0058] The technical effect brought by the mesoporous silica material prepared by the present invention is:

[0059] (1) It can effectively solve the problem of fly ash...

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Abstract

The invention discloses a method for large-scale preparation of mesoporous silica. The method comprises the steps of 1, mixing of coal ash and auxiliaries containing calcium and sodium, 2, grinding, 3, high-temperature treatment, 4, controllable corrosion and 5, drying so that the mesoporous silica can be obtained. The method effectively achieves the purpose of disposal of coal ash of a thermal power generation plant, and a novel scheme is provided for comprehensive utilization and high value-added utilization of coal ash; the adopted raw materials are low in price, and the synthesis cost is low; the synthesis process is simple and easy to implement industrially, and the great industrial potential is achieved; the synthetized mesoporous silica has the large specific surface area and the pore volume, the pore size distribution is relatively concentrated, and the wide application prospect is achieved in the chemical engineering fields such as adsorption and catalysis.

Description

technical field [0001] The invention relates to the field of solid waste resource recycling and the preparation of new materials, in particular to a method for large-scale preparation of mesoporous silicon dioxide using fly ash. Background technique [0002] Fly ash is a by-product of coal-fired power generation in thermal power plants, and its annual output reaches 750 million tons [1] and is still increasing. At present, the global utilization rate of fly ash is only 15%~25%[1], and the treatment and disposal of fly ash are still limited to landfill and stockpiling. A large amount of fly ash that has not been effectively used not only takes up valuable land resources, but also pollutes the atmosphere and discharges into the water system to block the river, and the harmful components in it, such as heavy metal ions and some of them, are volatilized, It even poses a threat to the human body and other organisms through the food chain. This has brought huge environmental pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
CPCC01B33/181C01P2006/17
Inventor 乔秀臣李辰晨黄志君
Owner 华东理工常熟研究院有限公司
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