Silicon-phosphorus synergistic coal flame-retardant dust suppressant and preparation method thereof

A technology of phosphorus-based flame retardants and silicon-based flame retardants, which is applied in the field of silicon-phosphorus synergistic coal flame retardant and dust suppressants and its preparation, can solve problems such as poor compression resistance, high cost, and fragility, and achieve resource Abundant, inexpensive, and biocompatible results

Active Publication Date: 2020-10-09
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

Method used

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  • Silicon-phosphorus synergistic coal flame-retardant dust suppressant and preparation method thereof
  • Silicon-phosphorus synergistic coal flame-retardant dust suppressant and preparation method thereof
  • Silicon-phosphorus synergistic coal flame-retardant 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 dust suppressants and particularly discloses a silicon-phosphorus synergistic coal flame-retardant dust suppressant and a preparation methodthereof. The silicon-phosphorus synergistic coal flame-retardant dust suppressant comprise the following components, by mass: 0.10 to 0.30 part of a phosphorus-based flame retardant, 0.15 to 0.30 partof a silane coupling agent, 0.008 to 0.018 part of a catalyst, 80.0 to 160.0 parts of a solvent, 0.10 to 0.40 part of a silicon flame retardant, 0.1 to 0.4 part of a pH regulator, 83.0 to 125.0 partsof deionized water, 57.0 to 95.0 parts of an alcohol compound, 1.0 to 2.0 parts of a natural polymer, 10.0 to 20.0 parts of a monomer, 4.0 to 8.0 parts of a pH buffer agent, 0.1 to 0.4 part of an initiator, 0.02 to 0.08 part of a cross-linking agent, 0.2 to 0.4 part of a surfactant and 0.2 to 1.0 part of a plasticizer. The silicon and phosphorus elements are introduced into the flame-retardant dust suppressant and the flame-retardant dust suppressant is an efficient silicon-phosphorus synergistic flame-retardant system to overcome the defects of lower flame-retardant level and small limit oxygen index of a single flame retardant, and has excellent flame retardancy. A polymer film formed after spraying can prevent pulverized coal from being blown away, and coal dust pollution is reduced; and the effect of isolating oxygen can be achieved, so that spontaneous combustion of coal is prevented.

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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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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