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A preparation method of fly ash-based high-performance adsorption material

An adsorption material and fly ash technology, which is applied in the field of waste recycling, can solve the problems of cumbersome methods and increased costs, and achieve the effects of simple operation, cost saving and excellent adsorption performance

Inactive Publication Date: 2016-06-15
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is feasible, compared with using Al in fly ash to directly synthesize Al-containing high-performance adsorption materials, the method is cumbersome and the cost is also greatly increased.

Method used

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  • A preparation method of fly ash-based high-performance adsorption material
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  • A preparation method of fly ash-based high-performance adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Synthesis of Al-containing mesoporous adsorption materials:

[0034] (1) First, mix fly ash and sodium hydroxide according to the mass ratio of 1:1.2 and then melt at high temperature. The high-temperature melting is carried out in a muffle furnace at a temperature of 500°C and a melting time of 1 hour. Cool naturally to obtain a mixture;

[0035] (2) Then, add distilled water to the mixture to dissolve, filter and take the supernatant for use, wherein the supernatant is aluminosilicate solution; the mass ratio of the mixture to distilled water is 1:4;

[0036] (3) Weigh 1.0g of surfactant and add it to the mixed solution of 60ml deionized water and ethanol. After the surfactant dissolves, add 60ml of supernatant. In the mixed solution, Si:CTAB:ethanol:ammonia:water Molar ratioSi:CTAB:EtOH:H 2 O=1:0.11:30:267, after stirring for 6 hours, add acetic acid dropwise to adjust the pH to 10, filter and wash, put it in a drying oven for 12 hours at 100°C;

[0037] (4) Finall...

Embodiment 2

[0041] Synthesis of High Al Content Adsorbent Materials:

[0042] (1) Firstly, fly ash and sodium hydroxide are mixed according to the mass ratio of 1:1.2 and then melted at high temperature. The high-temperature melting is carried out in a muffle furnace at a temperature of 550°C and a melting time of 1 hour. Cool naturally to obtain a mixture;

[0043] (2) Then, add distilled water to the mixture to dissolve, filter and take the supernatant for use, wherein the supernatant is aluminosilicate solution; the mass ratio of the mixture to distilled water is 1:4;

[0044] (3) Weigh 2.0g of surfactant and add it to the mixed solution of 60ml deionized water and ethanol. After the surfactant dissolves, add 30ml of supernatant, and the mixed solution contains Si:CTAB:ethanol:ammonia:water The molar ratio of Si:CTAB:EtOH:H 2 O=1:0.30:40:210, after stirring for 10 hours, add acetic acid dropwise to adjust the pH to 10, filter, wash, and put it in a drying oven for 12 hours at 100°C;

...

Embodiment 3

[0047] Synthesis of Adsorbent Materials with Slightly Lower Al Content

[0048] (1) First, mix fly ash and NaOH at a mass ratio of 1:1.3 and then melt at high temperature. The high-temperature melting is carried out in a muffle furnace at a temperature of 600°C and a melting time of 1.5 hours. After cooling, the mixture is obtained;

[0049] (2) Then, add distilled water to the mixture to dissolve, filter and take the supernatant for use, wherein the supernatant is aluminosilicate solution; the mass ratio of the mixture to distilled water is 1:4;

[0050] (3) Weigh 2g of surfactant and add it to 60ml of deionized water and ethanol. After the surfactant dissolves, add 60ml of supernatant. The molar ratio of Si:CTAB:ethanol:water in the mixed solution is Si:CTAB: EtOH:H 2 O=1:0.30:54:174, after stirring for 14 hours, add acetic acid dropwise to adjust the pH to 7, filter and wash, put it in a drying oven for 12 hours at 100°C;

[0051] (4) Finally, put the white powder into a ...

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Abstract

The invention belongs to the waste recycling field, and relates to a preparation method for a fly-ash-based adsorption material. The method comprises the following steps: first, fly ash and alkali are mixed, subjected to high temperature melting, and cooled, and a mixture is obtained; second, the mixture obtained from the first step is added with distilled water and dissolved, filtration is carried out and the supernatant liquid is obtained for standby; third, then the supernatant liquid, structure-directing agents and ethanol are mixed uniformly and stirred fully, the above mixed solution is subjected to pH adjustment with acids, filtration, washing and drying are carried out, and a white powder material is obtained; fourth, the white powder material obtained from the third step is calcined, and aluminum-containing mesoporous powder-like adsorption material MCM-41 molecular sieves are obtained. The preparation method is advantaged by simple operation, low cost and high utilization rate of the raw materials. Components of silicon, aluminum and the like in fly ash can be converted into effective components of the adsorption material through the method. The method plays a positive role in adsorption of pollutants in waste water. Solid waste fly ash can be recycled through the method and the purpose of treatment of waste by utilization of waste is achieved.

Description

technical field [0001] The invention belongs to the field of waste recycling and relates to a preparation method of a fly ash-based adsorption material. Background technique [0002] Coal fly ash (CFA) mainly comes from the fine particle dispersed residues after pulverized coal combustion in coal-fired power plants. Using aluminosilicate in fly ash as raw material to prepare adsorption materials is one of the important ways to develop high value-added products using fly ash at home and abroad in recent years. Adsorption materials prepared by using fly ash include activated carbon, zeolite, mesoporous materials, etc. For example, the Chinese patent application "New Process for Preparing Activated Carbon from Fly Ash" with the application number of 200810143173.3 proposes to use flotation separation from fly ash, etc. The carbon particles are separated by means, and then activated carbon is obtained through a series of treatments. However, using this method to prepare activa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30
Inventor 范建伟冉献强邹立寅李丹丹闵宏扬姜序孙宇王赟丁玲杨隽晔陈晟薛峰江晓庆
Owner TONGJI UNIV