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Method for preparing composite mesoporous material from coal gasification coarse slag and prepared mesoporous material

A mesoporous material and coal gasification technology, which is applied in the field of solid waste resource utilization, can solve the problems of harsh process conditions, high cost, and complex process of mesoporous materials, and achieve the effect of simple preparation process and low cost

Active Publication Date: 2020-04-07
鄂尔多斯市慧恒科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mesoporous materials obtained by chemical synthesis methods are complicated in process, harsh in process conditions and high in cost
[0007] In addition, based on the existing research reports on coal gasification slag, it can be seen that the existing research on the utilization of coal gasification slag mainly focuses on other components other than carbon, such as silicon-aluminum inorganic components, and only a few studies have reported Coal gasification slag is re-mixed with coal and used as fuel for treatment, without involving the coordinated development and utilization of carbon-rich components and silicon-aluminum materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Weigh 50g of coal gasification coarse slag, take another 140ml of 36wt% concentrated hydrochloric acid, add water to dilute to 400ml, and then add it to the coarse slag. The acid concentration of the slurry is about 12.5wt%, and the solid content is about 10wt%. Stir and react at room temperature for 2h. Solid-liquid separation afterwards, washing to pH equals 4; The dissolution rate of the product aluminum oxide obtained under this condition is 90%, the dissolution rate of calcium oxide is 96%, and the dissolution rate of iron oxide is 87%; The mixed solution of aluminum and ferric chloride can be used for the product development of polyaluminum ferric chloride water purifying agent; add 1.0wt% sodium hydroxide aqueous solution to the separated and washed solid, stir at room temperature for 2 hours, and then separate the solid and liquid, wash until the pH is equal to 8, and then wash at 100 ℃ drying, the obtained product is carbon / silicon mesoporous composite; the mater...

Embodiment 2

[0027] Weigh 50g of coal gasification coarse slag, take another 100ml of 36wt% concentrated hydrochloric acid, add water to dilute to 400ml, and then add it to the coarse slag. The acid concentration of the slurry is about 9.0wt%, and the solid content is about 8wt%. Solid-liquid separation afterwards, washing to pH equals 4; The product alumina dissolution rate that obtains under this condition is 76%, and calcium oxide dissolution rate is 82%, and iron oxide dissolution rate is 66%; Isolated calcium chloride, chloride The mixed solution of aluminum and ferric chloride can be used for the product development of polyaluminum ferric chloride water purifying agent; add 200ml of 0.5wt% sodium hydroxide aqueous solution to the separated and washed solid, stir at room temperature for 2h, then separate the solid and liquid, wash until the pH is equal to 8, and Drying at 100°C, the product obtained is a carbon / silicon mesoporous composite; the material is activated by water vapor at 7...

Embodiment 3

[0029] Weigh 50g of coal gasification coarse slag, take another 140ml of 36wt% concentrated hydrochloric acid, add water to dilute to 400ml, and then add it to the gasification slag. The acid concentration of the slurry reaches 12.5wt%, and the solid content is about 16.7wt%. After 4h, solid-liquid separation, washing until pH equals 4; the dissolution rate of the product alumina obtained under this condition was 84%, the dissolution rate of calcium oxide was 96%, and the dissolution rate of iron oxide was 77%; the separated calcium chloride, The mixed solution of aluminum chloride and ferric chloride can be used for the development of polyaluminum ferric chloride water purifying agent; add 200ml of 0.5wt% sodium hydroxide aqueous solution to the separated and washed solid, stir at room temperature for 2 hours, then separate the solid and liquid, and wash until the pH is equal to 8 , dried at 100°C, the product obtained is a carbon / silicon mesoporous composite; the material is ...

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Abstract

The invention discloses a method for preparing a composite meso-porous material from coarse coal gasification slag. The method comprises the following steps: 1, taking the coarse coal gasification slag, mixing the coarse coal gasification slag with a proper amount of an acid solution to obtain a slurry, and performing an acid dissolution reaction; and 2, carrying out solid-liquid separation on a material obtained after the acid dissolution reaction, and performing washing and drying to obtain the product. The invention also discloses the composite meso-porous material prepared through the method. The carbon / silicon composite meso-porous material is obtained through controlled dissolution under mild conditions by using the high activity of silicon aluminum calcium iron in the coarse coal gasification slag. The material has the advantages of good physical and chemical adsorption performances, good ion exchange performance, simple preparation process, low cost, realization of further preparation of a water purifier from dissolved metal ions, realization of the comprehensive utilization of all components in the coal gasification slag, and realization of changing wastes into valuables.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and in particular relates to a method for preparing carbon / silicon composite mesoporous materials by acid-dissolving, alkali-dissolving and activating coal gasification coarse slag, and the prepared composite mesoporous materials. Background technique [0002] Coal gasification technology is one of the core contents of clean coal technology. Incomplete oxidation of coal to obtain combustible coal gasification gas (such as crude gas) for downstream use has rapidly become an important direction of coal resources and energy utilization in recent years. In the past 20 years, my country has built a number of coal chemical enterprises in Yulin, Shaanxi, Ordos, Inner Mongolia, Changzhi, Shanxi, Zhundong, Xinjiang, Yili and other places, which have been put into operation one after another, and the output has increased year by year. scale. [0003] In the coal gasification tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/103B01J20/20B01J20/28061B01J20/28071B01J20/28073B01J20/28083B01J2220/42B01J2220/4806
Inventor 魏存弟艾伟东姚阳阳蒋引珊杨殿范魏世伦薛兵
Owner 鄂尔多斯市慧恒科技有限责任公司
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