Preparation method of anion sulfonate type coal water slurry dispersant

An anionic sulfonate and coal-water slurry technology, which is applied in liquid carbon-containing fuels, petroleum industry, fuels, etc., can solve the problems of poor fluidity of coal slurry and poor stability of coal slurry, and achieve excellent dispersion and stabilization , not easy to gel, good fluidity and stability

Inactive Publication Date: 2013-02-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there have been many studies on coal water slurry dispersants. The industrially used coal water slurry dispersants mainly include naphthalene series, humic acid series, lignin series, polycarboxylic acid series and other products. Among them, naphthalene series dispersants and humic acid series The common disadvantage of dispersants is that the stability of coal slurry is poor, and the fluidity of coal slurry prepared by lignosulfonate and polycarboxylate dispersants is not good

Method used

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  • Preparation method of anion sulfonate type coal water slurry dispersant

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Comparison scheme
Effect test

Embodiment 1

[0021] 1) First, mix acrylic acid (AA), itaconic acid (IA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) according to the mass ratio of AA:IA:AMPS=5:2:10, and then Add water and stir evenly to obtain a terpolymer with a solid content of 20%; 2) Next, use sodium hypophosphite as a chain transfer agent, and add the chain transfer agent to the terpolymer in an amount of AA, 5% of the total mass of IA and AMPS; 3) Then, add 0.5% of the total mass of AA, IA and AMPS to the initiator of the terpolymer, and stir to obtain a mixture. The initiator is ammonium persulfate; 4) Finally, The mixture was reacted in a water bath at 80° C. for 4 hours, then cooled to room temperature, and then the pH was adjusted to 9 to obtain an anionic sulfonate-type terpolymer coal-water slurry dispersant.

Embodiment 2

[0023] 1) First, mix acrylic acid (AA), itaconic acid (IA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) according to the mass ratio of AA:IA:AMPS=5:2:10, and then Add water and stir evenly to obtain a terpolymer with a solid content of 40%; 2) Next, use sodium hypophosphite as a chain transfer agent, and add the chain transfer agent to the terpolymer in an amount of AA, 7% of the total mass of IA and AMPS; 3) Then, add 0.7% of the total mass of AA, IA and AMPS to the terpolymer and stir to obtain a mixture. The initiator is potassium persulfate; 4) Finally, The mixture was reacted in a water bath at 85° C. for 5 hours, then cooled to room temperature, and then the pH was adjusted to 10 to obtain an anionic sulfonate-type terpolymer coal-water slurry dispersant.

Embodiment 3

[0025] 1) First, mix acrylic acid (AA), itaconic acid (IA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) according to the mass ratio of AA:IA:AMPS=5:2:10, and then Add water and stir evenly to obtain a terpolymer with a solid content of 25%; 2) Next, use sodium hypophosphite as a chain transfer agent, and add the chain transfer agent to the terpolymer in an amount of AA, 15% of the total mass of IA and AMPS; 3) Then, add AA, IA and an initiator of 1.0% of the total mass of AMPS to the terpolymer, and stir to obtain a mixture. The initiator is potassium persulfate-sodium sulfite, persulfuric acid The mass ratio of potassium: sodium sulfite = 2:1; 4) Finally, the mixture was reacted in a water bath at 90°C for 4 hours, cooled to room temperature, and then adjusted to pH 10 to obtain an anionic sulfonate terpolymer coal water slurry Dispersant.

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Abstract

The invention discloses a preparation method of an anion sulfonate type coal water slurry dispersant. A terpolymer is prepared from an anion monomer and a sulfonate monomer as reaction monomers under the action of an initiator and a chain transfer agent through free radical polymerization. By using the dispersant obtained by the preparation method disclosed by the invention, coal water slurry with solid content of 60-70% has excellent dispersion and stabilization effects; and the dispersant is suitable for various coal species, in particular slurrying of coal with poor quality.

Description

technical field [0001] The invention relates to the field of preparation of coal water slurry additives, in particular to a preparation method of an anionic sulfonate type coal water slurry dispersant. Background technique [0002] Coal water slurry is a new type of low-pollution oil-substituting fuel. It disperses high-solid-content pulverized coal particles in water by physical methods and transforms them into fluid fuels. Coal water slurry technology, as an economical, clean and efficient coal utilization technology, has been vigorously developed in my country. It has the characteristics of economy, environmental protection and energy saving, and because of its low cost, it also has the same fluidity and stability as oil , also has the characteristics of convenient transportation and utilization, and has attracted extensive attention from all over the world. The coal water slurry dispersant is a kind of surfactant which has two opposite properties of lipophilicity and hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F228/02C08F220/58C08F220/06C08F222/02C08F2/38C10L1/24C10L1/32
Inventor 米小慧李小瑞牛育华李培枝王晨樊智良
Owner SHAANXI UNIV OF SCI & TECH
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