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Scale and corrosion inhibitor, preparation method and application thereof

A scale and corrosion inhibitor, reaction technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve microbial outbreaks such as algae, weaken corrosion and scale prevention, and reduce heat transfer Efficiency and other issues, to achieve excellent scale and corrosion inhibition performance, protect the environment, save water resources

Inactive Publication Date: 2017-09-15
徐文忠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The use of circulating water in industry is beneficial to save the cost of enterprises and improve the benefits of enterprises. However, there will be two problems in the process of using circulating water. One is the evaporation of water, which causes the crystallization and precipitation of salts. The most common ones are Calcium carbonate, calcium silicate and other scales, the existence of scales greatly reduces the heat transfer efficiency, and the second is the electrochemical corrosion of circulating water on the equipment. Human life, at present, scale and corrosion inhibitors are added to circulating water to reduce the appearance of scale and slow down the corrosion of equipment
[0003] Most of the existing scale and corrosion inhibitors are composed of organic phosphonic acid and organic polymers. Adding this type of scale and corrosion inhibitors to the water body will easily cause eutrophication of the water body, resulting in the outbreak of algae and other microorganisms, and the deterioration of water quality, which weakens the water quality to a certain extent. The effect of anti-corrosion and anti-scaling

Method used

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  • Scale and corrosion inhibitor, preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0043] A kind of scale and corrosion inhibitor, its preparation method comprises the following steps:

[0044] A, get 1mol acetaldehyde, 5mol acetone and 0.5mol ethylenediamine and mix to obtain a mixture;

[0045] B. Use hydrochloric acid to adjust the pH value of the mixture obtained in step A to 4, heat to 80° C., react for 14 hours and let it stand to room temperature, and take the supernatant after standing;

[0046] C. Add a mixed solution of propynyl alcohol solution and citric acid solution to the supernatant obtained in step B, the weight ratio of the supernatant and the mixed solution is 1:1, and the propyne in the mixed solution is The weight ratio of the alcohol solution to the citric acid solution is 1:1, the concentration of propynyl alcohol in the propynyl alcohol solution is 10wt%, and the concentration of citric acid in the citric acid solution is 10wt%; after 1.5 hours of reaction, the scale inhibition Corrosion inhibitor.

[0047] The addition amount of th...

Embodiment 2

[0049] A kind of scale and corrosion inhibitor, its preparation method comprises the following steps:

[0050] A, get 3mol acetaldehyde, 2mol acetone and 1.5mol ethylenediamine to mix, obtain mixture;

[0051] B. Use hydrochloric acid to adjust the pH value of the mixture obtained in step A to 3, heat to 90° C., react for 6 hours and let it stand to room temperature, and take the supernatant after standing;

[0052]C. Add a mixed solution of propynyl alcohol solution and citric acid solution to the supernatant obtained in step B, the weight ratio of the supernatant and the mixed solution is 1:1, and the propyne in the mixed solution is The weight ratio of the alcohol solution to the citric acid solution is 1:1, the concentration of propynyl alcohol in the propynyl alcohol solution is 20wt%, and the concentration of citric acid in the citric acid solution is 20wt%; after reacting for 0.5 hours, the scale inhibition Corrosion inhibitor.

[0053] The addition amount of the scal...

Embodiment 3

[0055] A kind of scale and corrosion inhibitor, its preparation method comprises the following steps:

[0056] A, get 2mol acetaldehyde, 4mol acetone and 1mol ethylenediamine and mix to obtain a mixture;

[0057] B. Use hydrochloric acid to adjust the pH value of the mixture obtained in step A to 3-4, heat to 85° C., react for 10 hours and let it stand to room temperature, and take the supernatant after standing;

[0058] C. Add a mixed solution of propynyl alcohol solution and citric acid solution to the supernatant obtained in step B, the weight ratio of the supernatant and the mixed solution is 1:1, and the propyne in the mixed solution is The weight ratio of alcohol solution and citric acid solution is 1:1, the concentration of propynyl alcohol in propynyl alcohol solution is 15wt%, and the concentration of citric acid in citric acid solution is 15wt%; after reacting for 1 hour, the scale inhibition Corrosion inhibitor.

[0059] The addition amount of the scale and corro...

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Abstract

The invention relates to a scale and corrosion inhibitor, a preparation method and an application thereof. The scale and corrosion inhibitor is prepared according to the method which comprises the following steps: A) mixing aldehyde, acetone and quadrol; B) regulating the pH value of a mixture acquired in the step A) to 3-4, heating to 80-90 DEG C, reacting for 6-14 hours and then standing by and taking supernate after standing by; C) adding a mixed solution containing propargyl alcohol solution and citric acid solution into the supernate acquired in the step B), reacting for 0.5-1.5 hours and then acquiring the scale and corrosion inhibitor. The scale and corrosion inhibitor is a phosphate-free scale and corrosion inhibitor, no organic phosphonic acid is used, and meanwhile, the anti-scale and anticorrosion effects are excellent and an excellent anti-scale corrosion inhibition property is achieved under the condition of high-hardness, high-alkalinity and high pH water, so that the environment is protected and the water resource is saved, no toxic pungent smell is generated and the scale and corrosion inhibitor is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and in particular relates to a scale and corrosion inhibitor, its preparation method and application. Background technique [0002] The use of circulating water in industry is beneficial to save the cost of enterprises and improve the benefits of enterprises. However, there will be two problems in the process of using circulating water. One is the evaporation of water, which causes the crystallization and precipitation of salts. The most common ones are Calcium carbonate, calcium silicate and other scales, the existence of scales greatly reduces the heat transfer efficiency, and the second is the electrochemical corrosion of circulating water on the equipment. For human life, scale and corrosion inhibitors are currently added to circulating water to reduce the appearance of scale and slow down the corrosion of equipment. [0003] Most of the existing scale and corrosion inhibitors a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/10C23F11/14
CPCC02F5/12C02F5/10C23F11/146
Inventor 徐文忠
Owner 徐文忠