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Application of graphene with special structure in preparation of coal mine dust suppressant

A special structure, graphene technology, applied in the direction of graphene, other chemical processes, chemical instruments and methods, etc., can solve the problems of high cost of dust suppressant, high production cost, large water consumption, etc., to achieve safe oxidation process, The effect of low cost and low water consumption

Pending Publication Date: 2021-11-30
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the production cost of single-layer graphene is relatively high, and the cost of the dust suppressant produced by this method is too high, and the practical application is of little significance
Moreover, single-layer graphene is difficult to disperse and cannot be evenly distributed in the dust suppressant, and the dust suppression effect cannot meet expectations
[0005] Due to the addition of a large amount of concentrated sulfuric acid in the preparation process of graphene oxide, it needs to be washed with a large amount of deionized water to remove the acid in the later stage, and in addition to the oxygen-containing functional groups grafted on the graphene oxide sheet, graphene oxide will appear at this time. The gel-like state increases technical difficulty for washing, and consumes a lot of water, produces a large amount of acid-containing waste liquid, and the subsequent treatment costs are high; thus resulting in high cost of graphene oxide
[0006] In addition, the inorganic nanoparticles added to the existing dust suppressant and coal dust have different physical and chemical structures, coupled with electrostatic repulsion, the effect on settling small particles of coal dust is not good

Method used

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  • Application of graphene with special structure in preparation of coal mine dust suppressant
  • Application of graphene with special structure in preparation of coal mine dust suppressant
  • Application of graphene with special structure in preparation of coal mine dust suppressant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A dust suppressant for coal mines, comprising:

[0044] Sodium dodecylbenzenesulfonate: 2%;

[0045] Fatty alcohol polyoxyethylene ether: 1%;

[0046] Graphene with special structure: 0.1%;

[0047] Aqueous solution: make up 100%.

[0048] The graphene of described special structure is prepared by the method comprising the following steps:

[0049] Add 9g flake graphite to 270ml of sulfuric acid solution with a concentration of 60%, fully stir for 30min under ice-water bath, then add 9gKMnO 4 , continue to stir for 30min under ice-water bath conditions, then slowly raise the temperature to 30°C for 30min, then slowly add 200ml of deionized water dropwise, after the dropwise addition is completed, raise the temperature to 80°C and stir for 30min, then lower the temperature to room temperature, and then add a large amount of deionized water Ionized water was used to terminate the reaction, followed by the dropwise addition of H 2 o 2 Remove unreacted KMnO 4 , and t...

Embodiment 2

[0054] A dust suppressant for coal mines, comprising:

[0055] Sodium lauryl sulfate: 2%;

[0056] Fatty alcohol polyoxyethylene ether: 1%;

[0057] Graphene with special structure: 0.1%;

[0058] Aqueous solution: make up 100%.

[0059] The graphene of described special structure is prepared by the method comprising the following steps: adding 9g flake graphite to 270ml concentration is 60% sulfuric acid solution, fully stirs 30min under ice-water bath, then adds 13.5gKMnO several times in small amounts 4 , continue to stir for 30min under ice-water bath conditions, then slowly raise the temperature to 30°C for 30min, then slowly add 200ml of deionized water dropwise, after the dropwise addition is completed, raise the temperature to 80°C and stir for 30min, then lower the temperature to room temperature, and then add a large amount of deionized water Ionized water was used to terminate the reaction, followed by the dropwise addition of H 2 o 2 Remove unreacted KMnO 4 , a...

Embodiment 3

[0064] A dust suppressant for coal mines, comprising:

[0065] Sodium fatty alcohol polyoxyethylene ether sulfate: 1%;

[0066] Fatty acid diethanolamide: 1%;

[0067] Graphene with special structure: 0.2%;

[0068] Aqueous solution: make up 100%.

[0069] The graphene of described special structure is prepared by the method comprising the following steps: adding 9g flake graphite to 270ml concentration is the sulfuric acid solution of 75%, fully stirs 30min under ice-water bath, then adds 13.5gKMnO several times in small amounts 4 , continue to stir for 30min under ice-water bath conditions, then slowly raise the temperature to 30°C for 30min, then slowly add 200ml of deionized water dropwise, after the dropwise addition is completed, raise the temperature to 80°C and stir for 30min, then lower the temperature to room temperature, and then add a large amount of deionized water Ionized water was used to terminate the reaction, followed by the dropwise addition of H 2 o 2 ...

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Abstract

The invention relates to application of graphene with a special structure in preparation of a coal mine dust suppressant. The graphene with a special structure is prepared by the following method: oxidizing and intercalating crystalline flake graphite with sulfuric acid and potassium permanganate, and then performing mechanical exfoliation. Graphene treated by a special method is added into the dust suppressant, and part of the graphene has a structure similar to that of coal dust, so that the graphene can adsorb tiny coal dust and then be settled, and the settling efficiency is improved.

Description

technical field [0001] The invention relates to the field of coal mine dust suppression, in particular to the application of graphene with a special structure in the preparation of coal mine dust suppressant. Background technique [0002] The current dust suppressants used in coal mines are generally chemical dust suppressants, such as nonionic surfactants, anionic surfactants, additives, etc. The human body is non-toxic and harmless, but if inhaled for a long time, the chemical reagents in the body will continue to accumulate, which will have a non-negligible impact on the human body. In addition, dust suppressants are generally composed of one or several stable polymer compounds with relatively stable physical and chemical properties and are difficult to degrade in the environment. Long-term use will have a certain impact on the surrounding environment such as groundwater. Moreover, the general dust suppressant has a certain range of particle settlement for dust, and has ...

Claims

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Application Information

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IPC IPC(8): C09K3/22C01B32/19
CPCC09K3/22C01B32/19
Inventor 张浪姚海飞李欣李伟靳磊徐长富张思睿王耀强李艳川
Owner CCTEG CHINA COAL RES INST
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