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A kind of environment-friendly scale and corrosion inhibitor and preparation method thereof

A scale and corrosion inhibitor, an environmentally friendly technology, applied in chemical instruments and methods, descaling and water softening, special treatment targets, etc. Achieve significant scale and corrosion inhibition, remarkable effect, and good scale and corrosion inhibition effect

Active Publication Date: 2020-10-16
钟司雨 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The scale and corrosion inhibitors currently on the market have a single component, and the descaling effect is not good, especially for circulating water with high hardness and high pH. This is the deficiency of the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] An environment-friendly scale and corrosion inhibitor, consisting of the following components by weight percentage:

[0045] Polyacrylic acid 3%

[0046] Zinc Sulfate 10%

[0047] 3-(2-thiophene)propionic acid 0.5%

[0048] 5-Sulphosalicylic acid 2.5%

[0049] Ethyl 2-chloro-6-fluorophenylacetate 0.02%

[0050] 4-(1-Bromoethyl)-5-fluoro-6-chloropyrimidine 0.02%

[0051] The balance is water.

[0052] The preparation method of the above-mentioned environment-friendly scale and corrosion inhibitor is: adding polyacrylic acid, zinc sulfate, 3-(2-thiophene) propionic acid, 5-sulfosalicylic acid, 2-chloro-6-fluoro Ethyl phenylacetate, 4-(1-bromoethyl)-5-fluoro-6-chloropyrimidine, the previous component is fully stirred before adding the next component, and the last component is fully stirred to obtain the product.

Embodiment 2

[0054] An environment-friendly scale and corrosion inhibitor, consisting of the following components by weight percentage:

[0055] Polyacrylic acid 5%

[0056] Zinc Sulfate 3%

[0057] 3-(2-thiophene)propionic acid 1.5%

[0058] 5-Sulphosalicylic acid 1.5%

[0059] Ethyl 2-chloro-6-fluorophenylacetate 0.05%

[0060] 4-(1-Bromoethyl)-5-fluoro-6-chloropyrimidine 0.02%

[0061] The balance is water.

[0062] The preparation method of the above-mentioned environment-friendly scale and corrosion inhibitor is: adding polyacrylic acid, zinc sulfate, 3-(2-thiophene) propionic acid, 5-sulfosalicylic acid, 2-chloro-6-fluoro Ethyl phenylacetate, 4-(1-bromoethyl)-5-fluoro-6-chloropyrimidine, the previous component is fully stirred before adding the next component, and the last component is fully stirred to obtain the product.

Embodiment 3

[0064] An environment-friendly scale and corrosion inhibitor, consisting of the following components by weight percentage:

[0065] Polyacrylic acid 4%

[0066] Zinc Sulfate 5%

[0067] 3-(2-thiophene)propionic acid 1%

[0068] 5-Sulphosalicylic acid 2%

[0069] Ethyl 2-chloro-6-fluorophenylacetate 0.035%

[0070] 4-(1-Bromoethyl)-5-fluoro-6-chloropyrimidine 0.035%

[0071] The balance is water.

[0072] The preparation method of the above-mentioned environment-friendly scale and corrosion inhibitor is: adding polyacrylic acid, zinc sulfate, 3-(2-thiophene) propionic acid, 5-sulfosalicylic acid, 2-chloro-6-fluoro Ethyl phenylacetate, 4-(1-bromoethyl)-5-fluoro-6-chloropyrimidine, the previous component is fully stirred before adding the next component, and the last component is fully stirred to obtain the product.

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Abstract

The invention discloses an environment-friendly scale and corrosion inhibitor comprising following components in percentage by weight: 3-5% of polyacrylic acid, 3-10% of zinc sulfate, 0.5-1.5% of 3-(2-thiophene) propionic acid, 1.5-2.5% of 5-sulfosalicylic acid, 0.02-0.05% of ethyl2-chloro-6-fluorophenylacetate, 0.02-0.05% of 6-(1-Bromoethyl)-4-chloro-5-fluoropyrimidine, and the balance of water. Compared with the prior art, the environment-friendly scale and corrosion inhibitor disclosed by the invention has the beneficial effects of being free of organic phosphonic acid and good in scale and corrosion inhibition effect, and especially obvious in scale and corrosion inhibition effect on circulating water with high hardness and high pH; and the adhesion speed of a carbon steel test tube is reduced to 5.25 mcm, and the corrosion rate of carbon steel is reduced to 0.00684 mm / a, all of which meet the 'very good' standard of Sinopec.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and in particular relates to an environment-friendly scale and corrosion inhibitor and a preparation method thereof. Background technique [0002] In the chemical industry, circulating cooling water accompanies the whole process of production, accounting for 70-80% of the total water consumption. The use of circulating water is conducive to saving the cost of the enterprise and improving the benefit of the enterprise. However, there will be two problems in the process of using the circulating water. One is the evaporation of water, which causes the crystallization and precipitation of salts. The most common one is 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 corrosion of equipment. This corrosion is fatal, ranging from replacing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C23F11/08
CPCC02F5/105C02F2303/08C23F11/08
Inventor 钟司雨
Owner 钟司雨