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Amphoteric polycarboxylate dispersing agent with macromolecular large branched chain and preparation method of amphoteric polycarboxylate dispersing agent

An amphoteric polycarboxylic acid, macromolecular technology, used in fuel additives, liquid carbon-containing fuels, petroleum industry, etc., to achieve excellent viscosity reduction, simple steps, and improved stability.

Pending Publication Date: 2021-12-17
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of an appropriate amount of cationic monomer is actually an optimization and upgrade of polycarboxylate dispersants, but which kind of cationic monomer to introduce, how to introduce, and how much to introduce still require a lot of practical foundation to solve these problems

Method used

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  • Amphoteric polycarboxylate dispersing agent with macromolecular large branched chain and preparation method of amphoteric polycarboxylate dispersing agent
  • Amphoteric polycarboxylate dispersing agent with macromolecular large branched chain and preparation method of amphoteric polycarboxylate dispersing agent
  • Amphoteric polycarboxylate dispersing agent with macromolecular large branched chain and preparation method of amphoteric polycarboxylate dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 An amphoteric polycarboxylate dispersant without macromolecular macrobranches. Using acrylic acid, sodium styrene sulfonate and trimethylenhexyl ammonium bromide as raw materials, it is synthesized by free radical polymerization, and the steps are as follows:

[0032] S1. Take a 250mL beaker, weigh 27.69g of acrylic acid, 39.81g of sodium styrene sulfonate (the molar ratio of acrylic acid: sodium styrene sulfonate is 2:1), and 70g of pure water in the beaker, add a magnet, a magnetic stirrer Stir until completely dissolved, pour into a dropper bottle for later use;

[0033] S2. Get a 50mL small beaker, weigh 2.5g of trimethylenhexyl ammonium bromide, add 10g of purified water to dissolve and set aside;

[0034] S3. take by weighing initiator 2.4g ammonium persulfate and be dissolved in 10g purified water for subsequent use;

[0035] S4. Take a 250mL four-necked flask, wash it and dry it, add 40g of isopropanol to the 250mL four-necked flask at room temperatu...

Embodiment 2

[0037] Example 2 An amphoteric polycarboxylate dispersant with macromolecular macrobranches. Using acrylic acid, methallyl alcohol polyoxyethylene ether and trimethylenhexyl ammonium bromide as raw materials, it is synthesized by free radical polymerization, and the steps are as follows:

[0038] S1. Take a 250mL beaker, weigh 14g of methallyl alcohol polyoxyethylene ether with a molecular weight of 1000, 53.5g of acrylic acid, and 70g of pure water into the beaker, add a magnet, stir with a magnetic stirrer until completely dissolved, and pour it into a drop bottle in standby;

[0039]S2. Get a 50mL small beaker, weigh 2.5g of trimethylenhexyl ammonium bromide, add 10g of purified water to dissolve and set aside;

[0040] S3. take by weighing initiator 2.4g ammonium persulfate and be dissolved in 10g purified water for subsequent use;

[0041] S4. Take a 250mL four-necked flask, wash it and dry it, add 40g of isopropanol to the 250mL four-necked flask at room temperature, u...

Embodiment 3

[0043] Example 3 A polycarboxylate dispersant with macromolecular macrobranches. Using acrylic acid, sodium styrene sulfonate, and methallyl alcohol polyoxyethylene ether as raw materials, it is synthesized by free radical polymerization, and the steps are as follows:

[0044] S1. Take a 250mL beaker, weigh 10.5g of methallyl alcohol polyoxyethylene ether with a molecular weight of 1000, 24.41g of acrylic acid, and 35.09g of sodium styrene sulfonate (the molar ratio of acrylic acid: sodium styrene sulfonate is 2:1 ), 80g of pure water in a beaker, add a magnet, and stir with a magnetic stirrer until completely dissolved, then pour it into a dropper for subsequent use;

[0045] S2. take by weighing initiator 2.4g ammonium persulfate and be dissolved in 10g purified water for subsequent use;

[0046] S3. Take a 250mL four-necked flask, wash it and dry it, add 40g of isopropanol to the 250mL four-necked flask at room temperature, use an oil bath to heat the four-necked flask to ...

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Abstract

The invention provides a preparation method of a coal water slurry dispersing agent and the coal water slurry dispersing agent prepared by the method. The preparation method of the coal water slurry dispersing agent comprises the steps of synthesizing the amphoteric polycarboxylate dispersing agent with a macromolecular large branch chain from acrylic acid, sodium p-styrenesulfonate, methylallyl alcohol polyoxyethylene ether and trimethyl allyl hexyl ammonium bromide by adopting a free radical polymerization method, wherein the dosage of each raw material is as follows: 20% of methylallyl alcohol polyoxyethylene ether, 3.5% of trimethyl allyl hexyl ammonium bromide, 31.4% of acrylic acid and 45.1% of sodium p-styrenesulfonate. The synthesis method provided by the invention has the advantages that the steps are simple, the reaction conditions are convenient to control, the product is easy to purify, and the dispersing agent shows an excellent viscosity reduction effect when the use amount of the dispersing agent is 0.5% of that of dry coal to prepare coal water slurry.

Description

technical field [0001] The invention belongs to the technical field of clean coal utilization, and in particular relates to an amphoteric polycarboxylate dispersant with macromolecular macrobranches and a preparation method thereof. Background technique [0002] Polycarboxylate dispersants have the characteristics of flexible and controllable structures, and can be tailored to specific coal samples to design optimal dispersant structures. At present, the process is still in the stage of experimental design, that is, the application of a series of synthetic dispersants to prepare coal water slurry, and the optimal dispersant structure is screened out by comparing the properties of coal water slurry. Generally, the process of matching dispersants can be realized in the laboratory, which is energy-saving, environmentally friendly and highly efficient. The synthesis of special dispersant can improve the quality of coal-water slurry to the greatest extent, and can completely avo...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F212/14C08F228/02C10L1/24C10L1/32C10L10/18
CPCC08F283/065C10L1/326C10L1/2468C10L10/18C08F220/06C08F212/30C08F228/02
Inventor 吕冬梅吴慧君李静郑智琦张学杰
Owner LIAOCHENG UNIV
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