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No-phosphate corrosion and scale inhibitor and its application

A phosphorus-free corrosion and scale inhibitor technology, applied in descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc. Achieve the effect of avoiding eutrophication, inhibiting anode corrosion, and enhancing polarity

Inactive Publication Date: 2007-11-07
WUHAN JINPO CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few varieties of phosphorus-free water treatment corrosion inhibitors. Due to the defects of various water treatment corrosion inhibitors, their application is limited. Except for a few varieties such as molybdate, zinc salt, and sodium gluconate, they are still compatible with phosphorus systems. Except for the combined use of corrosion inhibitors, the others have basically been eliminated, and there are few examples of successful applications

Method used

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  • No-phosphate corrosion and scale inhibitor and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A non-phosphorus corrosion and scale inhibitor, which is mixed from the following raw materials: 1) polyaspartic acid, 2) polymaleic anhydride, 3) acrylic acid / 2-acrylamide-2-methylpropenesulfonic acid Copolymer (being the existing raw material), 3) zinc salt, 4) natural organic macromolecule, 5) molybdate, 6) other components, the mass percentages of each raw material are:

[0035] Polyaspartic Acid 10%,

[0036] Polymaleic anhydride 30%,

[0037] Acrylic acid / 2-acrylamide-2-methylpropenesulfonic acid copolymer 15%,

[0038] Zinc salt 5%,

[0039] Natural organic polymer 12%,

[0040] Molybdate 8%,

[0041] Other ingredients 20%;

[0042] The other ingredients are sodium polyacrylate; the zinc salt is zinc chloride; the natural organic polymer is sodium gluconate; and the molybdate is potassium molybdate.

[0043]The above-mentioned non-phosphorus corrosion and scale inhibitor is applied to the circulating cooling water, and 30 mg of the non-phosphorus corrosion ...

Embodiment 2

[0045] A non-phosphorus corrosion and scale inhibitor, which is mixed from the following raw materials: 1) polyaspartic acid, 2) polymaleic anhydride, 3) acrylic acid / 2-acrylamide-2-methylpropenesulfonic acid Copolymer, 3) zinc salt, 4) natural organic polymer, 5) molybdate, 6) other components, the mass percentage of each raw material is:

[0046] Polyaspartic Acid 20%,

[0047] Polymaleic anhydride 20%,

[0048] Acrylic acid / 2-acrylamide-2-methylpropenesulfonic acid copolymer 20%,

[0049] Zinc salt 5%,

[0050] Natural organic polymer 10%,

[0051] Molybdate 5%,

[0052] Other ingredients 20%;

[0053] The other components are acrylic acid-hydroxypropyl acrylate copolymer; the zinc salt is zinc chloride; the natural organic polymer is sodium gluconate; and the molybdate is potassium molybdate.

[0054] The above-mentioned non-phosphorus corrosion and scale inhibitor is applied to the circulating cooling water, and 35 mg of the non-phosphorus corrosion and scale inhibi...

Embodiment 3

[0056] A non-phosphorus corrosion and scale inhibitor, which is mixed from the following raw materials: 1) polyaspartic acid, 2) polymaleic anhydride, 3) acrylic acid / 2-acrylamide-2-methylpropenesulfonic acid Copolymer, 3) zinc salt, 4) natural organic polymer, 5) molybdate, 6) other components, the mass percentage of each raw material is:

[0057] Polyaspartic Acid 20%,

[0058] Polymaleic anhydride 30%,

[0059] Acrylic acid / 2-acrylamide-2-methylpropenesulfonic acid copolymer 20%,

[0060] Zinc salt 4%,

[0061] Natural organic polymer 7%,

[0062] Molybdate 6%,

[0063] other ingredients 13%;

[0064] The other components are borates, and the borates are potassium borates; the zinc salts are zinc sulfate; the natural organic polymers are lignin derivatives; the molybdates are molybdenum Sodium acid.

[0065] The above-mentioned non-phosphorus corrosion and scale inhibitor is applied to the circulating cooling water, and 40 mg of the non-phosphorus corrosion and scale...

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Abstract

The present invention relates to no-phosphate corrosion and scale inhibitor and its application. The no-phosphate corrosion and scale inhibitor consists of polyaspartic acid and / or polyepoxy succinic acid 10-20 wt%, polymaleic anhydride 20-30 wt%, copolymer of acrylic acid and 2-acrylamido-2-methyl propenyl sulfonic acid 15-20 wt%, zinc salt 3-5 wt%, natural organic high molecular compound 5-12 wt%, molybdate 5-8 wt%, and other components 5-20 wt%. It has excellent corrosion retarding performance, high scale inhibiting performance and environment friendship.

Description

technical field [0001] The invention relates to a phosphorus-free corrosion and scale inhibitor and its application in circulating cooling water. Background technique [0002] The total amount of water resources in my country ranks 6th in the world, but the per capita share is only a quarter of the world's per capita, ranking 88th in the world, and it is a water-scarce country. Moreover, the distribution of limited water resources is also very uneven. 81% of them are distributed in the Yangtze River Basin and the area south of it. Each year, the economic loss caused by water shortage reaches 200 billion yuan. On the one hand, our country is short of water resources, but on the other hand, it is wasting a lot of precious water resources. The average reuse rate of industrial water in my country is only 30%, and the average water intake per 10,000 yuan of industrial production value is as high as 500m 3 Water, compared with developed countries there is a big gap. As the cont...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12C02F103/02
Inventor 喻新荣刘向阳
Owner WUHAN JINPO CHEM TECH
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