Phosphorus-free polymer corrosion inhibitor composition, phosphorus-free corrosion inhibitor and application of phosphorus-free corrosion inhibitor

A technology of phosphorus-free corrosion inhibition and composition, which is applied to the application of inhibiting the corrosion of carbon steel in seawater, phosphorus-free polymer corrosion inhibitor composition, and the field of phosphorus-free corrosion inhibitors, which can solve the problem of high cost of corrosion inhibitors and slowing down Large amount of corrosion agent, eutrophication and other problems, to achieve good corrosion inhibition effect, good corrosion inhibition effect and cost saving effect

Active Publication Date: 2021-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The formulations of corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulations. Although the performance can basically meet the requirements for use, there are still deficiencies in phosphorus-based formulations: phosphorus-based water treatment agents are used in the process of using There is a hidden danger of easy formation of phosphate scale, which affects the heat exchange effect of the water cooler during long-term operation; the phosphorus formula promotes the reproduction of microorganisms in the circulating water, and consumes a large amount of fungicides; the discharge of a large amount of phosphorus can easily lead to eutrophication of the receiving water
[000

Method used

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  • Phosphorus-free polymer corrosion inhibitor composition, phosphorus-free corrosion inhibitor and application of phosphorus-free corrosion inhibitor
  • Phosphorus-free polymer corrosion inhibitor composition, phosphorus-free corrosion inhibitor and application of phosphorus-free corrosion inhibitor
  • Phosphorus-free polymer corrosion inhibitor composition, phosphorus-free corrosion inhibitor and application of phosphorus-free corrosion inhibitor

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Example Embodiment

[0053]Preparation Example 1

[0054]Add allyloxy polyethylene glycol (0.1 mol) and phthalic acid (0.1 mol) with a molecular weight of 498 (ie m = 10) into the reaction kettle for esterification reaction. The reaction temperature is 80°C and the reaction time For 3h, allyloxy polyethylene glycol phthalic acid monoester derivatives are generated.

[0055]Add allyloxy polyethylene glycol (0.1 mol) with a molecular weight of 498 (ie n=10) and sulfamic acid (0.1 mol) into the reaction kettle, and react at 110°C for 3 hours to generate allyloxy polyethylene Diol sulfonate.

[0056]Three polymerized monomers-maleic anhydride (1.0g), allyloxy polyethylene glycol phthalic acid monoester derivative (3.0g), allyloxy polyethylene glycol sulfonate (3.0g) g), and distilled water (20.0g) into the reaction kettle, stir evenly, add 2g of sodium persulfate solution with a mass fraction of 20% at 60°C for 1 hour, and increase the temperature to 80°C after the addition is complete. After reacting for 3 hours, c...

Example Embodiment

[0057]Preparation Example 2

[0058]Add allyloxy polyethylene glycol (0.1 mol) and maleic anhydride (0.1 mol) with a molecular weight of 498 (ie m = 10) into the reaction kettle for esterification reaction. The reaction temperature is 80°C and the reaction time is 3h, generate allyloxy polyethylene glycol maleic acid monoester derivative.

[0059]Add allyloxy polyethylene glycol (0.01mol) with a molecular weight of 2480 (ie n=55) and sulfamic acid (0.01mol) into the reaction kettle, and react at 120°C for 4h to generate allyloxy polyethylene Diol sulfonate.

[0060]Three polymerized monomers-methacrylic acid (1.0g), allyloxy polyethylene glycol maleic acid monoester derivative (3.0g), allyloxy polyethylene glycol sulfonate (3.0g) ), and distilled water (20.0g) into the reaction kettle, stir evenly, add 2g of 20% ammonium persulfate solution dropwise at 65℃, dripping time is 1h, after the dripping is completed, heat up to 90℃, react 4h, cool to room temperature, the brown solution obtained is...

Example Embodiment

[0061]Preparation Example 3

[0062]Add allyloxy polyethylene glycol (0.1 mol) and maleic anhydride (0.1 mol) with a molecular weight of 498 (ie m = 10) into the reaction kettle for esterification reaction. The reaction temperature is 80°C and the reaction time is 3h, generate allyloxy polyethylene glycol maleic acid monoester derivative.

[0063]Add allyloxy polyethylene glycol (0.01mol) with a molecular weight of 2480 (ie n=55) and sulfamic acid (0.01mol) into the reaction kettle, and react at 120°C for 4h to generate allyloxy polyethylene Diol sulfonate.

[0064]Three polymerized monomers-maleic anhydride (4.0g), allyloxy polyethylene glycol maleic acid monoester derivative (2.5g), allyloxy polyethylene glycol sulfonate (0.5g) ), and distilled water (20.0g) into the reaction kettle, stir evenly, add 2g of 20% ammonium persulfate solution dropwise at 65℃, dripping time is 1h, after the dripping is completed, heat up to 90℃, react After cooling to room temperature for 3 hours, the resulting...

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Abstract

The invention relates to the field of corrosion inhibitors, and discloses a phosphorus-free polymer corrosion inhibitor composition, a phosphorus-free corrosion inhibitor and application of the phosphorus-free corrosion inhibitor. The phosphorus-free polymer corrosion inhibitor composition comprises a component A, a component B, a component C and a component D in a weight ratio of 1: (0.25-8.00):(0.10-3.00): (0.10-2.50), wherein the component A is selected from at least one of compounds with the structure shown in formula (1), the component B is selected from at least one of non-phosphorus corrosion inhibition polymers, the component C is selected from at least one of organic acid and organic acid salt, and the component D is selected from at least one of water-soluble zinc salts. The corrosion inhibitor composition has a good corrosion inhibition effect, and can achieve a good corrosion inhibition effect under the condition of lower concentration of the corrosion inhibitor on the premise of not influencing the treatment effect, so that the cost is greatly saved.

Description

technical field [0001] The invention relates to the field of corrosion inhibitors, in particular to a phosphorus-free polymer corrosion inhibitor composition, a phosphorus-free corrosion inhibitor and the application of the phosphorus-free corrosion inhibitor in inhibiting the corrosion of carbon steel in seawater. Background technique [0002] Petrochemical enterprises are large industrial water users. With the rapid development of industry and agriculture, the demand for fresh water resources continues to increase, resulting in increasingly scarce fresh water resources. About 70% of industrial water consumption is used for industrial cooling. Because seawater has the advantages of low water intake temperature, little seasonal influence, good cooling effect, and sufficient water source, it is of great significance to alleviate the shortage of freshwater resources in our country if seawater can be used instead of freshwater for industrial circulating cooling water. [0003]...

Claims

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Application Information

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IPC IPC(8): C23F11/173
CPCC23F11/173
Inventor 禚青倩孙飞王金华余正齐高嵩
Owner CHINA PETROLEUM & CHEM CORP
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