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Phosphorus-free non-nitrogen scale inhibition dispersant and preparation method thereof

A scale inhibitor and dispersant, maleic acid technology, applied in chemical instruments and methods, scale removal and water softening, water/sludge/sewage treatment, etc. Water environment pollution, complex preparation process and other problems, to achieve the effects of excellent water treatment performance, short polymerization time and simple operation

Active Publication Date: 2020-09-22
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: CN107857374 discloses a preparation method of a polymer scale inhibitor, which is specifically formed by copolymerization of epoxysuccinic acid, itaconic acid, and 2-acrylamido-2-methylpropanesulfonic acid, but these polymer monomers Although it does not contain phosphorus, it contains nitrogen. When the sulfonic acid group is introduced into the polymer molecule, nitrogen element is also introduced. Long-term use will also cause eutrophication of the water body; Use will cause pollution to the soil and water environment
The research team disclosed a sulfonic acid group-containing epoxy succinic acid polymer and its preparation method in CN109942761, which was obtained by copolymerizing monomer epoxy succinic acid, itaconic acid and sodium methacrylate sulfonate, although the obtained The polymer does not contain phosphorus and nitrogen, but the preparation process is complicated and the polymerization time is long

Method used

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  • Phosphorus-free non-nitrogen scale inhibition dispersant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the four-necked flask that is furnished with condensing tube, thermometer device, add the itaconic acid IA maleic acid MA that mol ratio is 2:1, add a certain amount of deionized water, the addition of deionized water is itaconic acid and 2 times the total mass of maleic acid, stirred and dissolved. Then add the catalyst ammonium persulfate equivalent to 5% of the total mass fraction of itaconic acid and maleic acid, and the chain transfer agent isopropanol equivalent to 10% of the total mass fraction of IA and MA, heat to 80°C in a water bath, and react for 2 hours. Add sodium methacrylene sulfonate SMAS with the same molar number as maleic acid, and add ammonium persulfate with a mass fraction of 2% sodium methacrylene sulfonate SMAS and deionization equivalent to twice the mass of sodium methacrylene sulfonate SMAS After the water is dissolved, raise the temperature of the water bath to 90°C, continue the reaction for 2 hours, and then cool to room temperature to ...

Embodiment 2

[0025] In a four-neck flask equipped with a condenser tube and a thermometer device, add itaconic acid (IA) maleic acid (MA) with a molar ratio of 2:1, and add a certain amount of deionized water. The amount of deionized water added is Twice the total mass of itaconic acid and maleic acid, stir and dissolve. Then add catalyst ammonium persulfate equivalent to 4% of the total mass fraction of IA and MA and chain transfer agent isopropanol equivalent to 12% of the total mass fraction of IA and MA, heat to 85°C in a water bath, and react for 1.5h. Add sodium methacrylate sulfonate (SMAS) with the same molar number as MA, and add ammonium persulfate with a mass fraction of sodium methacrylate sulfonate of 2.2% and deionized water equivalent to twice the mass of sodium methacrylate sulfonate SMAS , after dissolving, the temperature of the water bath was raised to 90°C, the reaction was continued for 2h, and then cooled to room temperature to obtain a light yellow IA / MA / SMAS polymer...

Embodiment 3

[0027] In a four-neck flask equipped with a condenser tube and a thermometer device, add itaconic acid (IA) maleic acid (MA) with a molar ratio of 2:1, and add a certain amount of deionized water. The amount of deionized water added is Twice the total mass of itaconic acid and maleic acid, stir and dissolve. Then add catalyst ammonium persulfate equivalent to 7% of the total mass fraction of IA and MA and chain transfer agent isopropanol equivalent to 8% of the total mass fraction of IA and MA, heat to 75°C in a water bath, and react for 2h. Add sodium methacrylate sulfonate (SMAS) with the same molar number as MA, and add ammonium persulfate with a mass fraction of sodium methacrylate sulfonate of 1.8% and deionized water equivalent to twice the mass of sodium methacrylate sulfonate SMAS , after dissolving, raise the temperature of the water bath to 90°C, continue the reaction for 1.5h, and then cool down to room temperature to obtain a light yellow IA / MA / SMAS polymer solutio...

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Abstract

The invention relates to a phosphorus-free non-nitrogen scale inhibition dispersant and a preparation method thereof. The phosphorus-free non-nitrogen scale inhibition dispersant is obtained by copolymerizing itaconic acid, maleic acid and sodium methallyl sulfonate, wherein the molar ratio of itaconic acid to maleic acid to sodium methallyl sulfonate is 2: 1: 1. The preparation method comprises the following steps: firstly, adding a certain amount of deionized water into itaconic acid and maleic acid; stirring and dissolving, adding ammonium persulfate and isopropanol; reacting, and adding sodium methallyl sulfonate and ammonium persulfate; and carrying out polymerization. The phosphorus-free non-nitrogen scale inhibition dispersant has excellent biological degradability and water treatment performance; the preparation method provided by the invention has the advantages that the operation is simple, hydrogen peroxide is not required to be added, the polymerization time is short, themolecular weight of the synthesized polymer is about 2000, the scale inhibition dispersion performance is good, and the product performance is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to a phosphorus-free and non-nitrogen scale inhibitor dispersant and a preparation method thereof. Background technique [0002] At present, due to the long-term use of phosphorus-containing and acrylic antiscalants synthesized from petrochemical products, the problems of water and soil pollution caused by eutrophication and non-biodegradable water bodies are becoming more and more serious, and their use is greatly restricted. [0003] Studies have shown that the sulfonic acid group (-SO 3 H) Belongs to a strong acid group, has strong hydrophilicity, helps the dissociation of insoluble salts, and has a strong ability to resist high-valent metal ions, so many studies have introduced sulfonic acid groups into the molecular structure of polymers In order to improve its anti-scaling and dispersing properties. At present, scholars have introduced sulfonic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10
CPCC02F5/10
Inventor 刘振法闫美芳刘展李海花高玉华张利辉
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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