A kind of silicon-phosphorus synergistic coal flame retardant and dust suppressant and preparation method thereof

A technology of silicon-based flame retardants and dust suppressants, applied in chemical instruments and methods, other chemical processes, anti-corrosion coatings, etc., can solve the problems of low flame retardant level, poor compression resistance, and dependence on imports of flame retardants, etc. Achieve the effect of improving flame retardant performance, prolonging dust suppression cycle and preventing coal dust from dispersing

Active Publication Date: 2021-12-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the smoke toxicity and environmental problems caused by halogen-based flame retardants, they are being restricted by many industries. Halogen-free or low-halogen flame-retardant products are becoming the development trend of the industry
A single flame retardant has the disadvantages of low flame retardant level, small limiting oxygen index, and large addition amount
[0005] At present, most of the dust suppressants and flame retardants are used in combination in my country. Most of the flame retardants rely on imports and the cost is high.
Moreover, hard-shell dust suppressants are widely used in the market today, with poor compression resistance. The cured layer is relatively brittle after spraying, and is easily broken by shock and wind during transportation, thus losing the dust suppression effect. Therefore, a large amount of repeated spraying is required. Dust suppressant makes its cost higher

Method used

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  • A kind of silicon-phosphorus synergistic coal flame retardant and dust suppressant and preparation method thereof
  • A kind of silicon-phosphorus synergistic coal flame retardant and dust suppressant and preparation method thereof
  • A kind of silicon-phosphorus synergistic coal flame retardant and dust suppressant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A preparation method of silicon-phosphorus synergistic coal flame retardant and dust suppressant, comprising the following steps:

[0070] (1) Add 0.20g DOPO, 0.25g KH570 and 30.0g absolute ethanol to a three-necked flask filled with inert gas to obtain solution A;

[0071] Dissolve 0.014g of azobisisobutyronitrile in 10.0g of absolute ethanol to obtain solution B;

[0072] Add solution B to solution A dropwise for 30 minutes, then react in an oil bath at 75°C for 12 hours to obtain a crude product, remove the solvent by rotary evaporation, and then dry it for 24 hours to obtain a flame retardant intermediate.

[0073] The reaction scheme is as follows figure 1 As shown, the active hydrogen on DOPO can undergo free radical addition reaction with the double bond on KH570, and the catalyst azobisisobutyronitrile is added to accelerate the reaction, and the flame retardant intermediate is obtained from the reaction. The catalyst cannot be added too fast, otherwise it is ...

Embodiment 2

[0084] A preparation method of silicon-phosphorus synergistic coal flame retardant and dust suppressant, comprising the following steps:

[0085] (1) Add 0.20g DOPO, 0.30g KH570 and 50.0g toluene into a three-necked flask filled with inert gas to obtain solution A;

[0086] Dissolve 0.015g of azobisisobutyronitrile in 10.0g of toluene to obtain solution B;

[0087] Add solution B dropwise to solution A for 40 minutes, then react in an oil bath at 120°C for 12 hours to obtain a crude product, remove the solvent by rotary evaporation, and then dry it for 24 hours to obtain a flame retardant intermediate;

[0088] (2) Add a flame retardant intermediate to a beaker, add 57.0 g of ethanol and 3.0 g of deionized water to the flame retardant intermediate, add 0.12 g of acetic acid to adjust the pH to 4.0, and ultrasonically hydrolyze for 2 hours to obtain solution C;

[0089] Then transfer to a three-necked flask with an inert gas, add 50.0g parts of absolute ethanol, 0.20g nanomete...

Embodiment 3

[0096] A preparation method of silicon-phosphorus synergistic coal flame retardant and dust suppressant, comprising the following steps:

[0097] (1) Add 0.15g DOPO, 0.20g KH570, and 50.0g toluene into a three-necked flask filled with inert gas to obtain solution A;

[0098] Dissolve 0.011g of azobisisobutyronitrile in 10.0g of toluene to obtain solution B;

[0099] Add solution B dropwise to solution A for 40 minutes, then react in an oil bath at 120°C for 12 hours to obtain a crude product, remove the solvent by rotary evaporation, and then dry it for 24 hours to obtain a flame retardant intermediate;

[0100] (2) Add a flame retardant intermediate to a beaker, add 57.0 g of ethanol and 3.0 g of deionized water to the flame retardant intermediate, add 0.12 g of acetic acid to adjust the pH to 4.0, and ultrasonically hydrolyze for 2 hours to obtain solution C;

[0101] Then transfer to a three-necked flask with an inert gas, add 50.0g of absolute ethanol and 0.20g of kaolin,...

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Abstract

The invention belongs to the field of coal flame retardant and dust suppressant, and specifically discloses a silicon-phosphorus synergistic coal flame retardant and dust suppressor and a preparation method thereof. In parts by mass, the raw materials include the following components: 0.10-0.30 parts of phosphorus burning agent, 0.15-0.30 parts of silane coupling agent, 0.008-0.018 parts of catalyst, 80.0-160.0 parts of solvent, 0.10-0.40 parts of silicon-based flame retardant, 0.1-0.4 parts of pH adjuster, 83.0-125.0 parts of deionized water, 57.0-95.0 parts of alcohol compounds, 1.0-2.0 parts of natural polymers, 10.0-20.0 parts of monomers, 4.0-8.0 parts of pH buffers, 0.1-0.4 parts of initiators, 0.02-0.08 parts of cross-linking agents, 0.2-0.4 parts of Surfactant, 0.2-1.0 parts plasticizer. Silicon and phosphorus elements are introduced into this flame retardant and dust suppressant, which is an efficient silicon-phosphorus synergistic flame retardant system. performance. The polymer film formed after spraying can not only prevent coal powder from blowing away and reduce coal dust pollution, but also can isolate oxygen, thereby preventing spontaneous combustion of coal.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant and dust-suppressing agents for coal, in particular to a flame-retardant and dust-suppressing agent for coal with silicon-phosphorus synergy and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the demand for energy is increasing. As the main energy source, coal mining, transportation and storage are increasing year by year. At present, my country's coal is mainly transported by rail, and it is easy to generate dust when it is disturbed by the air flow during the transportation process, which will not only cause a serious waste of coal resources, but also cause great pollution to the surrounding air and seriously endanger people's health. At the same time, the spontaneous combustion of coal has been threatening the lives of operators and the safety of mining equipment in coal mining and storage, causing a lot of economic losses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/02C09D5/18C09D5/08C09D7/63C09K3/22C08F251/00C08F251/02C08F220/06
CPCC09D133/02C09D133/26C09D5/18C09D5/08C09D7/63C09K3/22C08F251/00C08F251/02C08K2201/011C08L2201/02C08L2201/06C08L5/04C08K9/06C08K5/5415C08K3/36C08K3/346C08K7/26C08K5/42C08K5/053C08K13/06C08L1/286C08F220/06
Inventor 来水利陈功杨欣李晨辉
Owner SHAANXI UNIV OF SCI & TECH
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