Environment-friendly chitosan compound containing corrosion and scale inhibitor and preparation method thereof

A technology of corrosion and scale inhibitor, chitosan, applied in the field of phosphorus-free scale and corrosion inhibitor and its preparation, can solve the problems of difficult biodegradation, high price, polluted water resources, etc., achieves good biodegradability, avoids The effect of eutrophication and improving water saving rate

Inactive Publication Date: 2017-01-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most of the organic corrosion and scale inhibitors currently used contain high content of phosphorus, molybdate and other components. As we all know, excessive phosphorus content in water will cause serious water eutrophication problems, and molybdenum as Non-renewable mineral resources, on the one hand, are expensive, on the other hand, they are difficult to be biodegraded after being discharged into water bodies, polluting water resources

Method used

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  • Environment-friendly chitosan compound containing corrosion and scale inhibitor and preparation method thereof

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preparation example Construction

[0025] Preparation of chitosan-containing compound corrosion and scale inhibitors, the method is as follows:

[0026] Add chitosan, polyaspartic acid or polyepoxysuccinic acid into distilled water in sequence, heat in a water bath to 80°C, add dilute hydrochloric acid with a mass concentration of 1% to 2%, stir at constant temperature for 1 to 2 hours, and let stand. After the temperature drops to normal temperature, a chitosan compound is obtained, wherein the mass ratio of chitosan to polyaspartic acid or polyepoxysuccinic acid is 1:2.7~1:3.4, and the mass concentration of chitosan to 1 The mass ratio of %~2% dilute hydrochloric acid is 1:1~1:1.5;

[0027] Each material is taken according to the following composition mass percentage: chitosan compound 35% ~ 40%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer 4% ~ 6%, polyacrylate 6% ~ 10%, sodium gluconate 10% ~ 15%, soluble zinc salt 3% ~ 5%, the rest is distilled water;

[0028] Add acrylic acid-2-acryl...

Embodiment 1

[0031] Prepare the chitosan compound according to the preparation method of the above-mentioned chitosan compound, wherein: chitosan 8g, polyaspartic acid 27g, water bath heating temperature 80 ℃, dilute hydrochloric acid mass concentration 1%, consumption 10g, constant temperature Stirring time 1h,

[0032] Prepare 100g of chitosan-containing compound corrosion and scale inhibitors according to the above method, the amount of each raw material: chitosan-polyaspartic acid compound 35g, acrylic acid-2-acrylamide-2-methylpropanesulfonate Acid copolymer (solid content is 40%) 4g, sodium polyacrylate 9g, sodium gluconate 12g, Zn(NO 3 ) 2 .6H 2 O 5g, the rest is distilled water.

Embodiment 2

[0034] Prepare the chitosan compound according to the preparation method of the above-mentioned chitosan compound: wherein: chitosan 9g, polyepoxysuccinic acid 27g, water bath heating temperature 80°C, dilute hydrochloric acid mass concentration 1%, consumption 10g, constant temperature Stirring time 1h,

[0035] Prepare 100g of chitosan-containing compound corrosion and scale inhibitors, raw materials: chitosan-polyepoxysuccinic acid compound 36g, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (solid Content is 40%) 5g, sodium polyacrylate 8g, sodium gluconate 13g, Zn(NO 3 ) 2 .6H 2 O 4g, the rest is distilled water.

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Abstract

The invention relates to an environment-friendly chitosan compound containing corrosion and scale inhibitor and a preparation method thereof. The environment-friendly chitosan compound containing corrosion and scale inhibitor is prepared from, by weight, 35%-40% of a chitosan compound, 4%-6% of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid, 6%-10% of polyacrylate, 10%-15% of sodium gluconate, 3%-5% of soluble zinc salt and the balance distilled water. The environment-friendly chitosan compound containing corrosion and scale inhibitor is lower than 0.020mm.a<-1> in corrosion rate and higher than 98.4% in scale inhibition rate and has great corrosion and scale inhibition effects.

Description

technical field [0001] The invention relates to the field of corrosion and scale inhibitors, in particular to a phosphorus-free scale and corrosion inhibitor containing chitosan compound and a preparation method thereof. Background technique [0002] With the gradual acceleration of my country's industrialization process, the total industrial water consumption is increasing year by year. Among them, circulating cooling water accounts for more than 90% of the total industrial water consumption. In the process of cooling water recycling, the mineral content in the water increases continuously, causing serious scaling and corrosion of equipment and pipelines, and bringing huge economic losses to people. Losses consume precious energy and resources. To solve this problem, organic corrosion and scale inhibitors are used in industrial circulating water. [0003] However, most of the organic corrosion and scale inhibitors currently used contain high content of phosphorus, molybda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C23F11/08
CPCC02F5/125C23F11/08
Inventor 曾德芳刘略包晗张思远车雅宁石昊谭琦赵相如
Owner WUHAN UNIV OF TECH
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