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Multifunctional scale and corrosion inhibitor and preparation method thereof

A scale and corrosion inhibitor, corrosion inhibition technology, applied in chemical instruments and methods, descaling and water softening, complex / solubilizer treatment, etc., can solve the problem that the use of phosphorus and nitrite cannot be completely avoided and cannot be universally applied and other problems, to achieve the effect of obvious scale and corrosion inhibition, strong biodegradability, and expand the scope of application

Inactive Publication Date: 2015-02-18
天津天和环能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both water treatment agents have the following two defects: 1) cannot completely avoid the use of phosphorus and nitrite; 2) cannot be universally applicable to different water treatment systems

Method used

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  • Multifunctional scale and corrosion inhibitor and preparation method thereof
  • Multifunctional scale and corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 10.5kg of polyaspartic acid, 3kg of hydrolyzed polymaleic anhydride, 15kg of sodium gluconate, 3kg of sodium molybdate, and 0.75kg of methylbenzotriazole; the scale and corrosion inhibitor No. R1 was prepared according to the above preparation method .

Embodiment 2

[0026] Weigh 12kg of polyepoxysuccinic acid, 3kg of hydrolyzed polymaleic anhydride, 15kg of sodium gluconate, 3kg of sodium molybdate, and 0.75kg of methylbenzotriazole; prepare the scale and corrosion inhibitor number R2 according to the above preparation method.

Embodiment 3

[0028] Weigh 4.5kg of polyaspartic acid, 7.5kg of polyepoxysuccinic acid, 3kg of hydrolyzed polymaleic anhydride, 15kg of sodium gluconate, 3kg of sodium molybdate, and 0.75kg of methylbenzotriazole; The scale and corrosion inhibitor number R3 was obtained.

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PUM

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Abstract

The invention discloses a multifunctional scale and corrosion inhibitor which integrates four effects, namely, scale inhibition, scale removal, corrosion inhibition and perfillmimg, and a preparation method thereof. The scale and corrosion inhibitor is of a nitrogen-free, non-phosphorus and molybdenum formula, and is prepared by compounding a non-phosphorus scale and corrosion inhibition component, methylbenzotriazole, hydrolytic polymaleic anhydride, sodium molybdate and sodium gluconate. According to the multifunctional scale and corrosion inhibitor, usage of phosphorus and nitrite is avoided, usage of molybdate is reduced, the multifunctional scale and corrosion inhibitor has the characteristics of being efficient, practical, non-toxic, environment-friendly, and low in cost, is applicable for scale and corrosion inhibition of water with high salinity and high degree of mineralization, can be widely applied to water treatment fields such as cold and hot circulating water, softened water and reverse osmosis, and the oilfield exploitation field.

Description

technical field [0001] The invention relates to a novel multifunctional scale and corrosion inhibitor mixture and a scale and corrosion inhibiting method of the scale and corrosion inhibitor in high-salt, high-salinity water quality. Background technique [0002] The main uses of industrial water are cooling and heating cycle water, process water, boiler water and cleaning water. Among them, the circulating water consumption accounts for 80% of the total water consumption, and the method of increasing the concentration multiple is currently used to save water. In the process of water circulation, due to the concentration of various ions and substances due to the evaporation of water, the hardness, alkalinity and pH value of circulating water will increase accordingly, which will easily cause scaling and corrosion of equipment. In addition, in order to meet the requirements of boiler and process water, the source water of feed water needs to be treated by the demineralized w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/10C02F5/08B01D65/08
CPCC02F5/105B01D65/08C02F5/125C02F2103/10C02F2303/08C02F2303/22
Inventor 沈渭清薛琳
Owner 天津天和环能科技有限公司
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