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Saponin-grafted copolymer water-coal-slurry dispersing agent and preparation method thereof

A technology of graft copolymer and dispersant, which is applied in the field of saponin graft copolymer coal-water slurry dispersant and its preparation, can solve the problems of pollution, high production cost, poor storage stability, etc., and achieve good development prospects and high cost performance Effect

Inactive Publication Date: 2018-08-28
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 disadvantages such as unstable dispersion effect, poor storage stability, expensive raw materials, high production cost, and environmental pollution caused by the production process, which is not conducive to energy saving and emission reduction.

Method used

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  • Saponin-grafted copolymer water-coal-slurry dispersing agent and preparation method thereof
  • Saponin-grafted copolymer water-coal-slurry dispersing agent and preparation method thereof
  • Saponin-grafted copolymer water-coal-slurry dispersing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, dissolve deionized water and 3.5g saponin in a three-necked flask to make a saponin deionized aqueous solution with a mass fraction of 7%, then add 0.075g ammonium persulfate, heat and stir at 90°C, and make it react for 30min; cool down to 80°C ℃, adjust the pH to 8, first add a mixed solution of 1.9g sodium allyl sulfonate and 0.093g sodium bisulfite to a three-necked flask, then add a mixed solution of 0.11g ammonium persulfate and 1.3g acrylic acid, and react for 4 hours, Cool the mixed product to room temperature; at room temperature, adjust the pH of the product to 7.0 with a 20% NaOH aqueous solution by mass fraction to obtain a saponin graft copolymer coal water slurry dispersant.

Embodiment 2

[0041] First, dissolve deionized water and 4g saponin in a three-necked flask to make a saponin deionized aqueous solution with a mass fraction of 9%, then add 0.084g potassium permanganate, heat and stir at 88°C, and make it react for 25min; cool down to 78°C ℃, adjust the pH to 8.4, first add a mixed solution of 1.76g sodium substituted methyl ethylene sulfonate and 0.098g citric acid into the three-necked flask, then add a mixed solution of 0.14g potassium permanganate and 1.42g maleic anhydride, and react 4.5 After h, the mixed product was cooled to room temperature; at room temperature, the pH of the product was adjusted to 7.5 with a 30% NaOH aqueous solution by mass fraction to obtain a saponin graft copolymer coal-water slurry dispersant.

Embodiment 3

[0043] First, dissolve deionized water and 3.9g saponin in a three-necked flask to make a saponin deionized aqueous solution with a mass fraction of 8%, then add 0.076g horseradish peroxidase HPR, heat and stir at 85°C, and allow it to react for 25 minutes; Cool down to 83°C, adjust the pH to 8.9, first add a mixed solution of 1.88g sodium p-vinylbenzenesulfonate and 0.095g hydrogen peroxide into a three-necked flask, then add 0.11g horseradish peroxidase HPR and 1.54g formazan After reacting for 4.3 hours, the mixed product was cooled to room temperature; at room temperature, the pH of the product was adjusted to 8.0 with 25% NaOH aqueous solution to obtain a saponin graft copolymer coal-water slurry dispersant.

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Abstract

The invention relates to a saponin-grafted copolymer water-coal-slurry dispersing agent and a preparation method thereof. The preparation method comprises the following steps: completely dissolving all saponin in a three-neck flask by using an appropriate amount of deionized water, forming a 5 to 20 percent aqueous solution, then adding an oxidant in an initiator, heating, and stirring for a giventime at a constant temperature; cooling the reaction system, adjusting the pH, adding a given amount of X2 and reducing agent into the system, dropwise adding the remaining oxidant and a given amountof X1, keeping the temperature after the addition, polymerizing for a given time, and cooling a mixed product to the room temperature; and adjusting the pH of the cooled mixed product by using a NaOHaqueous solution, and obtaining the synthesized grafted copolymer water-coal-slurry dispersing agent. The saponin-grafting copolymer water-coal-slurry dispersing agent is brown clear emulsion. The slurry viscosity can be apparently reduced, and the stability of the slurry can be improved.

Description

technical field [0001] The invention relates to the technical field of coal water slurry additives, in particular to a saponin graft copolymer coal water slurry dispersant and a preparation method thereof. Background technique [0002] my country is rich in coal resources, and about 70%-80% of energy is mainly provided by coal. Therefore, reducing the emission of sulfide and dust during coal combustion and improving the combustion rate of coal have great significance for energy saving and emission reduction. Coal water slurry is a clean coal-utilizing technology developed in recent years. It is a new type of coal-based oil-substituting fuel made by physical processing of about 70% coal, 30% water and a small amount of additives. Because the surface of coal is hydrophobic, in order to form a stable coal-water mixed colloidal solution, it is necessary to use a dispersant to change the properties of the coal surface so that the coal particles can be evenly dispersed in water. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F228/02C08F222/06C08F220/10C08F220/06C08F220/58C10L1/32C10L1/24
CPCC08F251/00C10L1/2475C10L1/326C08F220/585
Inventor 朱军峰柏志力王佩拓欢张光华李俊国
Owner SHAANXI UNIV OF SCI & TECH
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