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Non-phosphorus scale and corrosion inhibitor, and preparation method and applications thereof

A phosphorus-free scale and corrosion inhibitor technology, applied in descaling and water softening, chemical instruments and methods, water/sludge/sewage treatment, etc. Water saving, environment friendly effect

Inactive Publication Date: 2011-06-01
CHENGDU QIDA WATER TREATMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the non-phosphorus (phosphine) scale and corrosion inhibitors at home and abroad are mostly two-component or three-component, which is inconvenient to add. Some agents also contain a small amount of phosphorus (phosphine) or other heavy metals.

Method used

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  • Non-phosphorus scale and corrosion inhibitor, and preparation method and applications thereof
  • Non-phosphorus scale and corrosion inhibitor, and preparation method and applications thereof
  • Non-phosphorus scale and corrosion inhibitor, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 10 parts of zinc sulfate, 27.5 parts of demineralized water and 5 parts of industrial sulfuric acid (H 2 SO 4 ), fully stirred until the zinc sulfate was completely dissolved, then added 15 parts of hydrolyzed polymass, 15 parts of polyaspartic acid, 20 parts of acrylic acid-acrylic acid ester copolymer, and after stirring evenly, added 3 parts of benzotriazole and 4 parts of industrial ethanol, stirred until the solution is transparent, and the scale and corrosion inhibitor is obtained.

[0044] The product is yellow to reddish-brown liquid, specific gravity ≥ 1.20, pH (1% aqueous solution) 1.0%.

Embodiment 2

[0046] Add 20 parts of zinc sulfate, 24 parts of demineralized water and 4 parts of industrial sulfuric acid (H 2 SO 4 ), fully stirred until the zinc sulfate was completely dissolved, then added 10 parts of hydrolyzed polymass and 35 parts of acrylic acid-acrylic acid ester copolymer in turn, after stirring evenly, added 3 parts of benzotriazole (BTA) and 4 parts of industrial ethanol, and stirred until the solution Transparent, the scale and corrosion inhibitor can be obtained.

[0047] The product is yellow to reddish-brown liquid, specific gravity ≥ 1.20, pH (1% aqueous solution) 1.0%.

Embodiment 3

[0049] Add 10 parts of zinc chloride (ZnCl2 ), 30 parts of demineralized water and 3 parts of industrial hydrochloric acid (HCl), fully stirred until the zinc chloride is completely dissolved, 30 parts of acrylic acid-acrylic acid ester copolymer, after stirring evenly, add 3 parts of tolyltriazole (TTA) and 4 parts of industrial ethanol, stirred until the solution is transparent, and the scale and corrosion inhibitor is obtained.

[0050] The product is yellow to reddish-brown liquid, specific gravity ≥ 1.20, pH (1% aqueous solution) 1.0%.

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Abstract

The invention relates to a non-phosphorus scale and corrosion inhibitor for industrial circulating water and a preparation method and applications thereof, and provides a non-phosphorus (phosphine) scale and corrosion inhibitor for industrial circulating water in order to settle the technical problems. The product containing single component has the characteristics of being convenient in addition and excellent in scale and corrosion inhibiting performance. The non-phosphorus scale and corrosion inhibitor consists of the following components in parts by weight: 30 to 50 parts of dispersing scale inhibitor, 8 to 25 parts of corrosion inhibitor and 28 to 43 parts of auxiliary, wherein the dispersing scale inhibitor is acrylic acid-acrylic ester terpolymer or the mixture of the acrylic acid-acrylic ester terpolymer and at least one of the hydrolytic maleic anhydride, polyaspartic acid and sodium polystyrene sulfonate; and the corrosion inhibitor is soluble zinc salt (e.g. zinc sulfate and zinc chloride) and benzotriazole (or methyl benzotriazole). The non-phosphorus scale and corrosion inhibitor has excellent scale and corrosion inhibiting performance as well as meets and precedes the demand of GB50050-2007.

Description

technical field [0001] The invention relates to a phosphorus-free scale and corrosion inhibitor for industrial circulating water, a preparation method and application thereof. Background technique [0002] The amount of cooling water in industrial water ranks first, accounting for more than 60%, the chemical industry accounts for about 65%, and the petroleum industry accounts for about 80%. Using circulating cooling and increasing the concentration ratio is the main method to save cooling water. [0003] The main purpose of circulating cooling water treatment is corrosion inhibition, scale inhibition, biocidal and anti-sludge, but usually it is difficult to use one agent to solve all the problems, and it needs to be treated as a whole, so it needs to be made into a compound formula to achieve the best effect. [0004] To prevent corrosion and scaling of circulating water system for mercaptobenzothiazole, scale and corrosion inhibitors are usually added to solve this problem...

Claims

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Application Information

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IPC IPC(8): C02F5/10
Inventor 不公告发明人
Owner CHENGDU QIDA WATER TREATMENT ENG
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