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Ternary copolymer coal water slurry dispersing agent and application thereof

A technology of coal water slurry and polymer, which is applied in the field of coal chemical industry, can solve the problems of long storage time, dispersant can not meet the slurry performance requirements, etc., achieve the effect of simple preparation process, increase coal concentration and stability, and reduce viscosity

Inactive Publication Date: 2013-10-16
陕西省能源化工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For coal-water slurry that is difficult to form into slurry or has high requirements, long storage time, and long-distance transportation, the existing dispersants cannot meet the performance requirements of slurry formation

Method used

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  • Ternary copolymer coal water slurry dispersing agent and application thereof
  • Ternary copolymer coal water slurry dispersing agent and application thereof
  • Ternary copolymer coal water slurry dispersing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] Preparation of polyethylene glycol monoacrylate: In a 1000 mL four-neck flask, add 100 mL polyethylene glycol, 200 mL acrylic acid, 1.0 g hydroquinone and 3.0 mL concentrated sulfuric acid in sequence. Heating to 100°C under stirring, and reacting for 2 h to the end to obtain polyethylene glycol monoacrylate, adjust the pH value of the product to 7.0 for later use.

[0022] The present invention can obtain three different types of dispersants through the following three synthetic routes.

[0023] 1. Preparation of cationic dispersant

[0024] 20% composed of polyethylene glycol monoacrylate, styrene and methacryloxyethyltrimethylammonium chloride (1:2:2, 1:2:3, 1:2:4, 1:2: 5) Composition of mixed monomers, 80% water and isopropanol solution, copolymerized under the trigger of 0.5% potassium persulfate (relative to the amount of mixed monomers),

[0025] .

[0026] 2. Preparation of charge-enhanced cationic dispersants

[0027] 20% made of polyethylene glycol monoa...

Embodiment 1

[0035] In a 1000 mL reaction flask, add 400 mL of water and isopropanol solution (4:1, v / v), heat to 80 °C, and drop the monomer mixture (20 mL of acrylic acid polyethylene glycol mono ester, 40 mL styrene and 40 mL methacryloxyethyltrimethylammonium chloride) and 0.5 g potassium persulfate. After the dropwise addition, the reaction was continued for 3 h. After cooling to room temperature, a yellow transparent liquid is obtained, which is a cationic dispersant. The weight-average relative molecular weight distribution of the three experimental products measured by gel chromatography is from 4000 to 6000, and the dispersity is about 2.5, indicating that the preparation process is stable.

[0036] The monomer polyethylene glycol monoacrylate, styrene, methacryloyloxyethyltrimethylammonium chloride or methacryloyloxyethyltriethylammonium chloride are mixed in a mass ratio of 1~2:2~ 3: Cationic dispersants with a weight-average relative molecular weight distribution of 4,000 to ...

Embodiment 2

[0038] In a 1000 mL reaction flask, add 400 mL of water and isopropanol (4:1, v / v), heat to 80°C, and add monomers (20 mL of polyethylene glycol monoacrylate, 40 mL of chloromethylstyrene and 40 mL of methacryloyloxyethyltrimethylammonium chloride) and 0.5 g of potassium persulfate initiator. After the dropwise addition, the reaction was continued for 3h. After cooling to room temperature, 20 mL of trimethylamine was added to the reaction solution, and the reaction was continued for 2 h at room temperature to obtain a yellow transparent liquid, which was the charge-enhanced cationic dispersant. The weight-average relative molecular weight distribution of the three experimental products measured by gel chromatography is from 4500 to 6500, and the dispersity is about 2.5, indicating that the preparation process is stable.

[0039]The monomer polyethylene glycol monoacrylate, chloromethyl styrene, methacryloyloxyethyltrimethylammonium chloride or methacryloyloxyethyltriethylammo...

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Abstract

The invention discloses a ternary copolymer coal water slurry dispersing agent represented by a structure general formula (I), wherein m is 5-30, n is 5-30, p is 5-20, h is an integer of 4-20, R is H or the following groups, X is -N(CH3)2, -N(CH2CH3)2 or the following groups. According to the present invention, a hydrophilic three-dimensional film is formed on the surface of coal particles to produce effects of wetting and absorption on a solid-liquid interface so as to produce a dispersion effect to the system, the prepared dispersing agent has characteristics of coal concentration increase, coal stability increase and viscosity decrease, a coal water slurry preparation cost is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to a terpolymer coal-water slurry dispersant and a preparation method thereof, belonging to the technical field of coal chemical industry. Background technique [0002] Coal Water Mixture (CWM for short) is a high-concentration coal / water dispersion system made by pulverizing coal into a certain particle size and mixing it with water in proportion. It usually consists of about 70% coal powder, 30% Composed of water and a small amount of chemical additives, it is an economical, clean liquid fuel and chemical raw material that can replace petroleum and natural gas. It has the characteristics of high-efficiency combustion, low pollution, low operating cost, energy saving and environmental protection. It has a remarkable effect in terms of energy consumption, reduction of pollution discharge, and improvement of enterprise economic benefits and social and environmental benefits. CWS should have high concentration, low viscosity and ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F212/08C08F212/14C08F220/34C10L1/236C10L1/32
Inventor 卫引茂张国柱
Owner 陕西省能源化工研究院
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