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Rosin-based anionic coal water slurry dispersing agent and preparation method thereof

An anionic, coal-water slurry technology, applied in the field of coal-water slurry dispersant, can solve the problems of high pulp viscosity, difficult handling and high price, and achieve the effects of good dispersibility and stability and large adsorption capacity

Active Publication Date: 2015-07-22
咸阳盘州现代农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nai series dispersants usually have better dispersion performance and good slurry flow pattern, but the disadvantages are poor stability, easy to produce hard sediment, and there is also the problem of high price
The main advantages of lignin-based dispersants are rich raw materials, low price, and good pulping stability. The disadvantages are high pulping viscosity, rough flow pattern, high impurity content, and difficult handling.

Method used

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  • Rosin-based anionic coal water slurry dispersing agent and preparation method thereof
  • Rosin-based anionic coal water slurry dispersing agent and preparation method thereof
  • Rosin-based anionic coal water slurry dispersing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6g of cyanuric chloride and 40.0g of chloroform into the reaction flask, and stir for 10min under ice-water bath. Add the above-mentioned dehydroabietylamine solution dropwise with a dropping funnel, and finish adding within 30 minutes. Then use 10% sodium hydroxide solution to keep the pH value of the system at 5, keep the reaction in an ice-water bath until the pH value remains unchanged, and obtain the intermediate product I.

[0025] 2) Add 10.0 g polyethylene glycol-400 and 40.0 g chloroform into another reaction flask, stir to dissolve. The temperature was raised to 35°C, and all the intermediate product I was slowly added dropwise to the reaction flask, and the dropwise addition was completed within 4 hours. Then use 10% sodium hydroxide solution to keep the pH value of the system at 6, keep the reaction until the pH value remains unchanged, and obtain the intermediate pr...

Embodiment 2

[0033] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6g of cyanuric chloride and 40.0g of chloroform into the reaction flask, and stir for 10min under ice-water bath. Add the above-mentioned dehydroabietylamine solution dropwise with a dropping funnel, and finish adding within 30 minutes. Then, the pH value of the system was maintained at 6 with a potassium hydroxide solution having a mass concentration of 10%, and the reaction was carried out in an ice-water bath until the pH value remained unchanged to obtain an intermediate product I.

[0034] 2) Add 15.0g polyethylene glycol-600 and 40.0g chloroform into another reaction flask, stir to dissolve. The temperature was raised to 40°C, and all the intermediate product I was slowly added dropwise to the reaction flask, and the dropwise addition was completed within 4 hours. Then use potassium hydroxide solution with a mass concentration of 10% to keep the pH value of the system at 6...

Embodiment 3

[0042] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6g of cyanuric chloride and 40.0g of chloroform into the reaction flask, and stir for 10min under ice-water bath. Add the above-mentioned dehydroabietylamine solution dropwise with a dropping funnel, and finish adding within 30 minutes. Then use 10% sodium hydroxide solution to keep the pH value of the system at 5, keep the reaction in an ice-water bath until the pH value remains unchanged, and obtain the intermediate product I.

[0043] 2) Add 29.9g polyethylene glycol-1200 and 40.0g chloroform into another reaction flask, stir to dissolve. The temperature was raised to 40°C, and all the intermediate product I was slowly added dropwise to the reaction flask, and the dropwise addition was completed within 4 hours. Then use 10% sodium hydroxide solution to keep the pH value of the system at 7, keep the reaction until the pH value remains unchanged, and obtain the intermediate pro...

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Abstract

The invention discloses a rosin-based anionic coal water slurry dispersing agent and a preparation method thereof. The method comprises the steps that cyanuric chloride serves as a crosslinking monomer; dehydroabietylamine and polyethylene glycol are sequentially connected in cyanuric chloride molecules via a nucleophilic substitution reaction; half ester is generated via a reaction with maleic anhydride; and finally sulphonation is performed by sodium sulfite to form the rosin-based anionic coal water slurry dispersing agent. The dispersing agent can better combine with the surface of coal, and is good in dispersity and stability and wide in applicable coal type range.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry dispersant, in particular to a rosin-based anionic coal-water slurry dispersant and a preparation method thereof. Background technique [0002] Coal water slurry is a new type of coal-based fluid clean fuel. It is a slurry-like coarse particle suspension system prepared by dispersing coal particles with a certain particle size distribution in water through a certain processing technology, of which coal accounts for about 60-70% %, water accounts for about 29-39%, and also includes about 1% chemical additives. Coal water slurry not only maintains the original physical and chemical properties of coal, but also has the same fluidity and stability as petroleum. It can be stored, pumped, atomized and burned stably. low advantage. In addition, coal water slurry can also be used as gasification raw material for the production of synthetic methanol, synthetic ammonia, etc. [0003] At present...

Claims

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Application Information

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IPC IPC(8): C10L1/24C10L1/32C08G65/48C07D239/52
Inventor 李俊国张光华陈蒙张昕玮郭艺
Owner 咸阳盘州现代农业有限公司
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