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A kind of preparation method of humic acid styrene sulfonate sodium graft copolymer coal water slurry dispersant

A technology of sodium styrene sulfonate and graft copolymer, which is used in fuels, liquid carbon-containing fuels, petroleum industry, etc. Promote adsorption, improve dispersion and viscosity reduction effect, and improve the effect of charge repulsion

Active Publication Date: 2020-09-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of preparation method of humic acid styrene sulfonate graft copolymer coal-water slurry dispersant, solve the existing humic acid system coal-water slurry dispersion The dispersion effect of the agent is poor, and it is easily affected by factors such as the environmental pH value and metal ions during use. The atom transfer radical polymerization used is a controllable / active polymerization, which can precisely control the structure of the product

Method used

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  • A kind of preparation method of humic acid styrene sulfonate sodium graft copolymer coal water slurry dispersant
  • A kind of preparation method of humic acid styrene sulfonate sodium graft copolymer coal water slurry dispersant
  • A kind of preparation method of humic acid styrene sulfonate sodium graft copolymer coal water slurry dispersant

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Effect test

Embodiment 1

[0032] (1) Disperse 10 g of humic acid in 20 mL of dichloromethane (26.5 g), add 3.08 g of triethylamine to the dispersion system, and move the system into a low temperature and constant temperature reaction bath, and the temperature of the reaction bath is 0°C. After the temperature equilibrated, 7 g of bromoisobutyryl bromide was added dropwise, and the dropwise addition continued for 0.5 hours. After the dropwise addition, the system was removed, and the reaction was continued at room temperature for 5 hours. After the reaction, filter with suction, and wash the filter residue with deionized water until it is neutral, and obtain the brominated humic acid macromolecular initiator after drying.

[0033] (2) Dissolve 10g of brominated humic acid initiator, 10.89g of 2,2-bipyridine, and 10g of sodium styrene sulfonate monomer in water, adjust the pH value of the solution to 10 with sodium hydroxide, and pass through the system Nitrogen for 15 minutes, and quickly add 5 g of cu...

Embodiment 2

[0036] (1) Disperse 10 g of humic acid in 30 mL of dichloromethane (39.75 g), add 7 g of triethylamine to the dispersion system, and move the system into a low temperature and constant temperature reaction bath, and the temperature of the reaction bath is 0°C. After the temperature equilibrated, 14 g of bromoisobutyryl bromide was added dropwise, and the dropwise addition continued for 0.5 hours. After the dropwise addition, the system was removed, and the reaction was continued at room temperature for 5 hours. After the reaction, filter with suction, and wash the filter residue with deionized water until it is neutral, and obtain the brominated humic acid macromolecular initiator after drying.

[0037] (2) Dissolve 10g of brominated humic acid initiator, 10.89g of 2,2-bipyridine, and 100g of sodium styrene sulfonate monomer in water, adjust the pH value of the solution to 10 with potassium hydroxide, and pass through the system Nitrogen for 15 minutes, and quickly add 5 g of...

Embodiment 3

[0040] (1) Disperse 10 g of humic acid in 20 mL of dichloromethane (26.5 g), add 3.08 g of triethylamine to the dispersion system, and move the system into a low temperature and constant temperature reaction bath, and the temperature of the reaction bath is 0°C. After the temperature equilibrated, 7 g of bromoisobutyryl bromide was added dropwise, and the dropwise addition continued for 0.5 hours. After the dropwise addition, the system was removed, and the reaction was continued at room temperature for 5 hours. After the reaction, filter with suction, and wash the filter residue with deionized water until it is neutral, and obtain the brominated humic acid macromolecular initiator after drying.

[0041] (2) Dissolve 10g of brominated humic acid initiator, 9.47g of 2,2-bipyridine, and 20g of sodium styrene sulfonate monomer in water, adjust the pH value of the solution to 10 with sodium hydroxide, and pass through the system Nitrogen for 15 minutes, and quickly add 3g of cupr...

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Abstract

The invention provides a water-coal-slurry dispersing agent for a humic acid sodium p-styrenesulfonate graft copolymer and a preparation method of the compound. The water-coal-slurry dispersing agentis structurally characterized in that the skeleton structure of humic acid is taken as a main chain, a sodium polystyrenesulfonate chain segment is grafted on a side chain, and by keying in the sodiumpolystyrenesulfonate segment, the dispersing agent is promoted to be adsorbed on the surfaces of coal particles when the electric charge density is enhanced simultaneously. The preparation method ofthe dispersing agent comprises the following steps: preparing a bromo-humic acid initiating agent through the acylation reaction of humic acid and bromo-isobutyryl bromide; preparing a crude product of the humic acid sodium p-styrenesulfonate graft copolymer by utilizing bromo-humic acid to trigger the atom transfer radical polymerization of a sodium p-styrenesulfonate monomer; removing impuritiesby utilizing a dialysis technology, and drying to obtain the powder-like product of the humic acid sodium p-styrenesulfonate graft copolymer. The utilized atom transfer radical polymerization belongsto controllable / active polymerization, and a product structure can be accurately controlled. The humic acid sodium p-styrenesulfonate graft copolymer provided by the invention has an excellent dispersive viscosity-reducing effect.

Description

technical field [0001] The invention relates to the technical field of coal chemical additives, in particular to a preparation method of a humic acid styrene sulfonate sodium graft copolymer coal water slurry dispersant. Background technique [0002] In my country's energy structure, coal resources occupy a large proportion, and in the future, coal will be the main form of energy in our country. However, the extensive use of coal resources will generate a large amount of carbon emissions and cause serious environmental pollution. Therefore, the efficient and green use of coal resources is an urgent scientific problem to be solved in our country. Coal water slurry is a clean coal-based liquid fuel, which generally consists of 62%-70% coal powder, 29%-37% water, and 1% chemical additives. As a new type of clean liquid fuel, coal water slurry has the advantages of high combustion efficiency, high calorific value, safe use and transportation, and low pollution. At present, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F212/14C08H7/00C10L1/32C10L1/195
CPCC08F289/00C08H6/00C10L1/195C10L1/326C08F212/14
Inventor 张万斌张光华黄燕张策
Owner SHAANXI UNIV OF SCI & TECH
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