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Composition and preparation method for preparing cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks

A technology of cross-linking, branching and spontaneous combustion, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of unsatisfactory dust suppression effect, difficult degradation of raw materials, and less dust suppressant, and achieve good water retention effect, absorption and swelling Good effect of preventing dust and spontaneous ignition

Active Publication Date: 2018-12-07
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of wind force, the stored coal produces a large amount of dust, which seriously affects the environment and restricts the development of coal mines
In addition, in the process of coal storage, due to the adsorption of oxygen in the air and oxidation, the heat generated by the oxidation accumulates to a certain extent and causes spontaneous combustion, which not only wastes energy but also pollutes the environment
Dust suppressants in the prior art are generally used for dust prevention and control of underground mining working faces, mainly some foam dust suppressants or dust suppressants obtained by compounding surfactants. This kind of dust suppressants are used in coal storage In dust prevention, the effect of dust suppression is not ideal. More importantly, these water-based dust suppressants can also provide moist heat for the oxidation of coal, thereby promoting the occurrence of coal spontaneous combustion
There are few studies on dust suppressants for coal stockpiling in open-air environments. The few dust suppressants suitable for coal stockpiling in open-air environments are not only relatively expensive, but also the selected raw materials are difficult to degrade and easily pollute the environment.

Method used

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  • Composition and preparation method for preparing cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks
  • Composition and preparation method for preparing cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks
  • Composition and preparation method for preparing cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks

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preparation example Construction

[0028] The present invention also provides a kind of preparation method of above-mentioned cross-linked graft copolymer, such as figure 1 As shown, it includes the following steps:

[0029] Step 1: Stir and dissolve the gelatin in warm water at 30-50°C, mix the inorganic salt solution into the solution and stir for ten minutes, then add ethyl phenylacetate and cross-linking agent to the solution and stir at 50-60°C for 1.5 Hour-2.5 hours, obtain the first solution;

[0030]

[0031] Step 2, adjust the pH value of the first solution, the final product is difficult to dissolve in water, adjust the amount and viscosity of the final product by adding an appropriate amount of water in the reaction stage, and obtain the second solution;

[0032] Step 3: Add N,N-dimethylformamide and initiator to the second solution, set the DF-1 constant temperature stirrer at 60-80°C and stir for 1-2 hours, then add Penetrant and preservative obtain above-mentioned cross-linked graft copolymer...

Embodiment 1

[0036] Weigh 2g of gelatin in warm water as a solvent, then add 0.15g of calcium chloride for stirring, then add 4g of ethyl phenylacetate and 0.04g of N-N methylenebisacrylamide, dissolve in 100ml of water, and react at a constant temperature at 50°C 2h; After the reaction, increase the water content of the solution to 300ml, adjust the pH value to 8; then add 4g of N,N-dimethylformamide, 0.6g of ammonium persulfate, and react at a constant temperature of 70°C After 3 hours, the cross-linked grafted product was obtained, and 0.4 ml of castor oil polyoxyethylene ether sulfonate and 0.2 ml of alkyl dimethyl benzyl ammonium chloride were added to the product, stirred and cooled before use.

Embodiment 2

[0038] Weigh 2g of gelatin in warm water, then add 0.15g of calcium chloride for stirring, then add 5g of ethyl phenylacetate and 0.04g of N-N methylenebisacrylamide, dissolve in 100ml of water, and react at a constant temperature at 50°C 2h; After the reaction, increase the water content of the solution to 300ml, adjust the pH value to 8; then add 4g of N,N-dimethylformamide, 0.6g of ammonium persulfate, and react at a constant temperature of 70°C After 3 hours, the cross-linked grafted product was obtained, and 0.4 ml of castor oil polyoxyethylene ether sulfonate and 0.2 ml of alkyl dimethyl benzyl ammonium chloride were added to the product, stirred and cooled before use.

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Abstract

The invention discloses a composition and a preparation method for preparing a cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks. The composition comprises 2%-5% of gelatin, 3%-5% of N,N-dimethylformamide, 4%-6% of ethyl phenylacetate, 0.3%-0.6% of a penetrant, 0.1%-0.3% of an antiseptic agent, 0.05-0.1% an initiator, 0.03%-0.05% a crosslinking agent and 0.1%-0.2% an inorganic salt. Gelatin, ethyl phenylacetate and N,N-dimethylformamide are subjected to a cross-linking and graft copolymerization reaction to finally form a flowing-state viscous agent. The viscous agent has the advantages that the dust suppression effect is good, the curing speed is fast, the formed protective layer is high in hardness, and the viscous agent is resistant to a certain strength harsh environment, and so on. The adhesive force of the dust suppression agent is relatively strong, a stable protection film is easy to form, and the protection film is not easy to break.

Description

technical field [0001] The invention relates to the field of dust prevention and suppression in coal storage sites, in particular to a composition and a preparation method for preparing a cross-linked graft copolymer for preventing coal storage dust and spontaneous combustion. Background technique [0002] With the development of the economy, the country has higher and higher requirements on the environment. Whether some high-pollution industries can carry out pollution prevention and control has become a key factor affecting the development of the industry, and coal mines are no exception. It is difficult to avoid stockpiling problems in the process of coal production and sales, but the main safety and environmental problems faced by coal mine stockpiling are dust and spontaneous combustion. Under the action of wind force, the stored coal produces a large amount of dust, which seriously affects the environment and restricts the development of coal mines. In addition, durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L71/00C08K5/19C08F289/00C08F222/38C08H1/00C09K3/22
CPCC08F289/00C08H1/00C08L51/00C09K3/22C08L71/00C08K5/19C08F222/385
Inventor 周刚李帅龙王钰颖孙健高丹红
Owner SHANDONG UNIV OF SCI & TECH
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