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Green and environment-friendly corrosion and scale inhibitor

A kind of corrosion and scale inhibitor, green and environmental protection technology, applied in descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of low scale inhibition rate, etc. and the effect of corrosion inhibition

Inactive Publication Date: 2021-04-06
广州市粤新工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these green and environmentally friendly phosphorus-free scale inhibitors have the problem of low scale inhibition rate in high-temperature environments. How to obtain green, environmentally friendly and high-temperature resistant corrosion and scale inhibitors is an important research direction at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Green environmental protection scale and corrosion inhibitor, its preparation method is as follows:

[0046] Add 60kg of modified polyepoxysuccinic acid and 8kg of amino acid corrosion inhibitor into 10kg of water, and stir evenly to obtain a green and environmentally friendly scale and corrosion inhibitor;

[0047] Wherein, in the present embodiment, the preparation method of modified polyepoxysuccinic acid is as follows:

[0048] Get 1.5kg deacetylation degree and be 70% chitosan and add in 30kg citric acid solution, after stirring until chitosan dissolves, obtain chitosan-citric acid solution; Wherein, the average relative molecular weight of chitosan is 100,000 , the weight ratio of citric acid to water in the citric acid solution is 0.1:1;

[0049] Add 3kg of absolute ethanol to the chitosan-citric acid solution, stir evenly, heat up to 80°C, heat to reflux for 1 hour, then cool to 50°C, add 38kg of polyepoxysuccinic acid, stir evenly and ultrasonically at a vibra...

Embodiment 2

[0052] Add 65kg of modified polyepoxysuccinic acid and 6kg of amino acid corrosion inhibitor into 12kg of water, and stir evenly to obtain a green and environmentally friendly scale and corrosion inhibitor;

[0053] Wherein, in the present embodiment, the preparation method of modified polyepoxysuccinic acid is as follows:

[0054] Get 2.0kg of chitosan with a degree of deacetylation of 80% and add it to 25kg of citric acid solution, stir until the chitosan dissolves to obtain a chitosan-citric acid solution; wherein the average relative molecular mass of chitosan is 150,000 , the weight ratio of citric acid to water in the citric acid solution is 0.15:1;

[0055] Add 6kg of absolute ethanol to the chitosan-citric acid solution, stir evenly, heat up to 75°C, heat to reflux for 1.5h, then cool to 45°C, add 42kg of polyepoxysuccinic acid, stir evenly and vibrate at 50KHz Sonicate for 3 hours, cool to room temperature, and finally adjust the pH to 5.5 with sodium hydroxide to ob...

Embodiment 3

[0058]Add 70kg of modified polyepoxysuccinic acid and 4kg of amino acid corrosion inhibitor into 15kg of water, and stir evenly to obtain a green and environmentally friendly scale and corrosion inhibitor;

[0059] Wherein, in the present embodiment, the preparation method of modified polyepoxysuccinic acid is as follows:

[0060] Get 2.5kg of chitosan with a degree of deacetylation of 85% and add it to 20kg of citric acid solution, stir until the chitosan is dissolved, and obtain a chitosan-citric acid solution; wherein, the average relative molecular mass of chitosan is 200,000 , the weight ratio of citric acid to water in the citric acid solution is 0.2:1;

[0061] Add 8kg of absolute ethanol to the chitosan-citric acid solution, stir evenly, heat up to 70°C, heat to reflux for 2 hours, then cool to 40°C, add 48kg of polyepoxysuccinic acid, stir evenly and ultrasonically at a vibration frequency of 58KHz Treat for 2 hours, cool to room temperature, and finally adjust the p...

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Abstract

The invention relates to the field of water treatment chemicals, and particularly discloses a green and environment-friendly corrosion and scale inhibitor. The environment-friendly corrosion and scale inhibitor is prepared from modified polyepoxysuccinic acid, an amino acid corrosion inhibitor, water and the like, and the preparation method of the modified polyepoxysuccinic acid comprises the following steps: adding chitosan with the deacetylation degree of 70-85% into a citric acid solution, and stirring until the chitosan is dissolved to obtain a chitosan citric acid solution; the preparation method comprises the following steps: adding absolute ethyl alcohol into a chitosan citric acid solution, uniformly stirring, heating and refluxing for 1-2h, cooling to 40-50 DEG C, adding polyepoxysuccinic acid, uniformly stirring, carrying out ultrasonic treatment for 2-4h, cooling to room temperature, and finally adjusting the pH value to 5.5-7.0, thereby obtaining the modified polyepoxysuccinic acid. The green and environment-friendly corrosion and scale inhibitor prepared by the invention still has good scale inhibition performance in a high-temperature state, does not bring in phosphorus, and has a green and environment-friendly effect.

Description

technical field [0001] This application relates to the field of water treatment chemicals, more specifically, it relates to a green environment-friendly corrosion and scale inhibitor. Background technique [0002] Water is an indispensable resource for human survival and development. In order to improve the utilization rate of industrial water, it is often necessary to treat industrial water so that the industrial water meets the requirements for the use of circulating cooling water, and then use the treated industrial water as circulating cooling water. water for use. [0003] However, the circulating cooling water will gradually concentrate during use. When the concentration of the circulating cooling water is too large, it will easily lead to the formation of calcium scale and iron scale. It is easy to cause problems such as pipeline corrosion. [0004] Among them, in order to prevent the above problems, it is generally necessary to add scale inhibitors with scale inhib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
CPCC02F5/12
Inventor 何星亮杜书林渝松李燕玲邝志冲
Owner 广州市粤新工程技术有限公司
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