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Tannic acid graft copolymer coal water slurry dispersant and preparation method thereof

A technology of graft copolymer and tannic acid, which is applied in the field of tannic acid graft copolymer coal-water slurry dispersant and its preparation, can solve the problems of expensive raw materials, unfavorable energy saving and emission reduction, poor storage stability and the like, and achieves the The raw materials are cheap and easy to obtain, the coal adaptability is good, and the thixotropy is good.

Active Publication Date: 2018-08-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These dispersants have unstable dispersion effects, poor storage stability, expensive raw materials, high production costs, and environmental pollution during production, which is not conducive to energy saving and emission reduction.

Method used

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  • Tannic acid graft copolymer coal water slurry dispersant and preparation method thereof
  • Tannic acid graft copolymer coal water slurry dispersant and preparation method thereof
  • Tannic acid graft copolymer coal water slurry dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 5.00g of tannic acid in a three-necked flask with an appropriate amount of deionized water to make a 7% aqueous solution, then add 0.16g of K 2 S 2 o 8 , at a temperature of 80° C., heated and stirred to make it fully dissolved, and reacted for 30 minutes. Then add 0.25g acrylic acid and 50g deionized water in the three-necked flask as solvent and add 0.14g NaHSO 3 , heat the material to 85°C, then dropwise add 0.55g ethylene sulfonic acid and 0.24g K 2 S 2 o 8 , Control the rate of addition, so that both are added dropwise within two hours at the same time. After 4 hours of constant temperature reaction, the mixed product is cooled to room temperature. The pH of the product was adjusted to 8 with 30% NaOH aqueous solution to obtain a tannic acid graft copolymer coal water slurry dispersant.

Embodiment 2

[0040] Dissolve 5.00g of tannic acid in a three-necked flask with an appropriate amount of deionized water to make a 10% aqueous solution, then add 0.16g of K 2 S 2 o 8 , at a temperature of 80° C., heated and stirred to make it fully dissolved, and reacted for 30 minutes. Then add 0.25g acrylic acid and 50g deionized water in the three-necked flask as solvent and add 0.14g NaHSO 3 , heat the material to 85°C, then dropwise add 0.93g p-vinylbenzenesulfonic acid and 0.24g K 2 S 2 o 8, Control the rate of addition, so that both are added dropwise within two hours at the same time. After 4 hours of constant temperature reaction, the mixed product is cooled to room temperature. The pH of the product was adjusted to 8 with 30% NaOH aqueous solution to obtain a tannic acid graft copolymer coal water slurry dispersant.

Embodiment 3

[0042] Dissolve 5.00g of tannic acid in a three-necked flask with an appropriate amount of deionized water to make a 10% aqueous solution, then add 0.16g of K 2 S 2 o 8 , at a temperature of 80° C., heated and stirred to make it fully dissolved, and reacted for 30 minutes. Add 0.25g of acrylamide and 50g of deionized water in a three-necked flask as a solvent and add 0.14g of NaHSO 3 , heated the material to 85°C, then added dropwise 0.547g ethylene sulfonic acid and 0.24g K 2 S 2 o 8 , Control the rate of addition, so that both are added dropwise within two hours at the same time. After 4 hours of constant temperature reaction, the mixed product is cooled to room temperature. The pH of the product was adjusted to 7 with 30% NaOH aqueous solution to obtain a tannic acid graft copolymer coal water slurry dispersant.

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Abstract

Provided are a tannic acid graft copolymer coal water slurry dispersant and a preparation method thereof. The preparation method comprises the steps: dissolving all tannic acid in a three-neck flask with a proper amount of deionized water to form a solution; then adding an oxidant in the initiator to the solution, in a certain temperature range, heating and stirring to fully dissolve, and carryingout a reaction for a certain time; adding a certain amount of an R1 corresponding monomer and a proper amount of deionized water as a solvent into the three-neck flask, adding a reductant to the materials, heating the materials to a certain temperature, then dropwise adding an R2 corresponding monomer and residual oxidant at the same time, and after carrying out reaction for a certain time, cooling the mixed product to room temperature; and at room temperature, adjusting the pH of the mixed product cooled in the step 2 with a NaOH aqueous solution, to obtain the synthesized tannic acid graftcopolymer coal water slurry dispersant. The dispersant can obviously reduce the slurrying viscosity and improve the stability of slurry; at the same time, the synthetic raw materials are cheap and easy to obtain, and the dispersant has no pollution to the environment after being burnt; the dispersant has good development prospect and quite high price / performance ratio.

Description

technical field [0001] The invention relates to the technical field of coal-water slurry additives, in particular to a tannic acid graft copolymer coal-water slurry dispersant and a preparation method thereof. Background technique [0002] Coal water slurry is a new type of oil-based fuel made of 60%-70% coal, 25%-40% water and a small amount of additives through physical processing. It is a new type of clean fuel that can replace heavy oil and coal. Coal-water slurry does not pollute the environment during storage and transportation, and is non-flammable and non-explosive during storage and transportation, and is safe and reliable. However, because the coal surface is mainly composed of compounds with aromatic ring structure, which has a certain degree of hydrophobicity and is prone to agglomeration in water, the system is thermodynamically unstable. In order to obtain ideal performance, dispersants play a very important role. The dispersant has the properties of a surfact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/18C10L1/24C08F228/02C08F212/14C08F220/06C08F220/56C08F2/44C08K5/1545
CPCC08F2/44C08F212/14C08F228/02C08K5/1545C10L1/14C10L1/2468C10L10/18C08F220/06C08F220/56
Inventor 朱军峰
Owner SHAANXI UNIV OF SCI & TECH