Nuclear-grade polyacrylic acid as well as preparation method and application thereof

A technology of polyacrylic acid and acrylic acid monomer, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. It can solve the problems of less impact on scale inhibition performance, achieve less environmental pollution, and produce Low cost and excellent anti-scaling performance

Inactive Publication Date: 2022-06-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few domestic reports on the preparation of sulfur-free or low-sulfur polyacrylic acid and its application in the field of nuclear power.
In addition, the molecular weight of polyacrylic acid has a significant impact on the scale inhibition effect, and there are few related reports on the influence of polyacrylic acid with different molecular weight levels on the scale inhibition performance.
In particular, there are few reports on the preparation of low-sulfur and high-molecular-weight polyacrylic acid scale inhibitors and their application in the secondary circuit of nuclear power plants.

Method used

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  • Nuclear-grade polyacrylic acid as well as preparation method and application thereof
  • Nuclear-grade polyacrylic acid as well as preparation method and application thereof
  • Nuclear-grade polyacrylic acid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 200 g of n-butanol, 100 g of acrylic monomer, and 1 g of dicumyl peroxide, slowly add them to the reaction kettle, and mix them uniformly for 0.5 hours. Under the protection of high-purity argon, it was slowly heated to 75 °C and kept at a constant temperature for 6 hours. Then, 50 g of the resulting product was weighed and poured into 50 g of ethylene glycol methyl ether solvent, and the polyacrylic acid solid was precipitated. Next, the precipitated polyacrylic acid was dried at 70° C. for 4 hours, then taken out and smashed, followed by drying for 8 hours. Finally, the formed polyacrylic acid solid powder is the nuclear grade polyacrylic acid scale inhibitor.

[0051] figure 1 It is the infrared spectrum of polyacrylic acid in Example 1, and the positions of the characteristic peaks in the spectrum correspond to the characteristic peaks of polyacrylic acid one by one, indicating that pure polyacrylic acid has been successfully prepared. figure 2 Optical mic...

Embodiment 2

[0053] Weigh 300 g of n-butanol, 100 g of acrylic monomer, and 1 g of azobisisobutyronitrile, and slowly add them to the reaction kettle and mix them uniformly for 1 hour. Under the protection of high-purity argon, it was slowly heated to 75 °C and kept at a constant temperature for 7 hours. Then, 50 g of the resulting product was weighed and poured into 100 g of ethylene glycol methyl ether solvent, and the polyacrylic acid solid was precipitated. Next, the precipitated polyacrylic acid was dried at 75° C. for 5 hours, then taken out and smashed, followed by drying for 7 hours. Finally, the formed polyacrylic acid solid powder is the nuclear grade polyacrylic acid scale inhibitor.

Embodiment 3

[0055] Weigh 400 g of n-butanol, 100 g of acrylic monomer, and 1 g of hydrogen peroxide, slowly add them into the reaction kettle, and mix them uniformly for 1.5 hours. Under the protection of high-purity argon, it was slowly heated to 80 °C and kept at a constant temperature for 8 hours. Then, 50 g of the resulting product was weighed and poured into 150 g of ethylene glycol methyl ether solvent, and the polyacrylic acid solid was precipitated. Next, the precipitated polyacrylic acid was dried at 80° C. for 6 hours, then taken out and smashed, followed by drying for 6 hours. Finally, the formed polyacrylic acid solid powder is the nuclear grade polyacrylic acid scale inhibitor.

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Abstract

The invention discloses nuclear-grade polyacrylic acid as well as a preparation method and application thereof. According to the nuclear-grade polyacrylic acid, the molecular weight of the nuclear-grade polyacrylic acid is 100,000 to 200,000, and the content of sulfur in the nuclear-grade polyacrylic acid is 500 ppb to 1000 ppb. The nuclear-grade polyacrylic acid is controllable in molecular weight, good in polydispersity, excellent in scale inhibition performance and excellent in decomposition half-life period, the molecular weight can be controlled to be 100,000-200,000, and the polydispersity is 1.0-3.5; the preparation method is short in period and simple in operation process; the preparation equipment is simple, the preparation efficiency is relatively high, and the volume of the synthetic reaction kettle used for preparation can be adjusted according to the yield, so that the preparation efficiency is greatly improved; the preparation method is low in preparation cost, green, clean and free of pollution. The raw materials in the preparation process are cheap and easy to obtain, the related reaction kettle only needs to consume a small amount of electric energy, the sulfur-free initiator is added, and the pollution to the environment is small due to alcohol and ether related solvents.

Description

technical field [0001] The application relates to a nuclear-grade polyacrylic acid, a preparation method and application thereof, and belongs to the technical field of scale inhibitor preparation. Background technique [0002] Scale inhibitors can effectively inhibit the formation of scale because of their chelating, dispersing, lattice distortion and other effects on scale substances, making them widely used in seawater desalination, water circulation systems and other fields. At present, the types of scale inhibitors represented by natural polymer scale inhibitors, inorganic phosphate scale inhibitors, organic phosphonate scale inhibitors and environment-friendly scale inhibitors have been widely promoted in actual industrial production. application. Among the above scale inhibitors, with the deepening of the concept of green environmental protection, natural polymer scale inhibitors and environment-friendly scale inhibitors have become ideal scale inhibitors because of t...

Claims

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Application Information

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IPC IPC(8): C08F120/06C02F5/10
CPCC08F120/06C02F5/10
Inventor 邱智华池利生刘志坤关怀民陈胜陈宇孔祥乾吴丽娜蔚海波
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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