Phosphorus-free corrosion and scale inhibitor as well as preparation method and application thereof

A technology of phosphorus-free corrosion and scale inhibitors, applied in scale removal and water softening, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem that application conditions cannot be covered and affect the non-phosphating process of cooling water , It cannot deal with the problems of various sources of replenishment water quality, long-term fluctuations of water quality leaked by complex water quality processes, etc., to achieve uniform and dense protective film, improve corrosion inhibition effect, and reduce surface defects

Pending Publication Date: 2022-04-01
GUIZHOU EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the non-phosphorous corrosion and scale inhibition technology disclosed in the prior art can only achieve better treatment effects in certain specific water qualities, and its application conditions cannot cover a wide range of water quality (for example, it can be used in low, medium, high -hardness, alkalinity, chloride

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  • Phosphorus-free corrosion and scale inhibitor as well as preparation method and application thereof

Examples

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Example Embodiment

[0063] The present invention provides the preparation method of the phosphorus-free corrosion and scale inhibitor described in the above technical solution, comprising the following steps:

[0064] The dispersant, the scale inhibitor and the phosphorus-free corrosion inhibitor are mixed to obtain the phosphorus-free corrosion and scale inhibitor.

[0065]The present invention has no special limitation on the mixing process of the dispersant, the scale inhibitor and the phosphorus-free corrosion inhibitor, and the materials can be uniformly mixed according to a process well known in the art.

[0066] In the present invention, when the phosphorus-free corrosion and scale inhibitor further includes a fluorescent tracer, the mixing process also includes adding a fluorescent tracer; when the phosphorus-free corrosion and scale inhibitor further includes sterilization When the agent is used, the mixing process also includes adding a bactericide; when the phosphorus-free corrosion an...

Example Embodiment

[0098] Example 1

[0099] A phosphorus-free corrosion and scale inhibitor, comprising a dispersant, a scale inhibitor and a phosphorus-free corrosion inhibitor; the dispersant is polyacrylic acid, the scale inhibitor is polyepoxysuccinic acid, and the phosphorus-free corrosion inhibitor is zinc chloride, Cerium chloride and methylbenzotriazole;

[0100] Among them, the mass ratio of the total effective actives of the dispersant and the scale inhibitor to the effective actives in the phosphorus-free corrosion inhibitor is 1:10; the mass ratio of the effective actives in the dispersant to the effective actives in the scale inhibitor is 1 : 1; the mass ratio of the effective active substances in zinc chloride to the effective active substances in cerium chloride is 1:0.25; the mass ratio of the total effective active substances of zinc chloride and cerium chloride to methyl benzotriazole is 1 : 0.333.

Example Embodiment

[0101] Example 2

[0102] A phosphorus-free corrosion and scale inhibitor, comprising a dispersant, a scale inhibitor, a phosphorus-free corrosion inhibitor, a bactericide and a solid acid; the dispersant is acrylic acid-2-acrylamide-2 methylpropanesulfonic acid copolymer AA / AMPS, scale inhibitor is polymaleic acid, phosphorus-free corrosion inhibitor is zinc chloride and cerium chloride, bactericide is 5-chloro-2methyl-4-isothiazoline-3 ketone), solid acid is citric acid .

[0103] Among them, the mass ratio of the total effective active substance of dispersant, scale inhibitor and phosphorus-free corrosion inhibitor to the effective active substance in the fungicide is 1:0015; the total effective activity of dispersant, scale inhibitor and phosphorus-free corrosion inhibitor The mass ratio of solid acid to solid acid is 1:0.59; the mass ratio of the total effective actives of dispersant and scale inhibitor to the effective actives of phosphorus-free corrosion inhibitor is ...

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Abstract

The invention provides a non-phosphorus corrosion and scale inhibitor as well as a preparation method and application thereof, and belongs to the technical field of industrial water treatment. By limiting the special proportion of the dispersing agent, the scale inhibitor and the water-soluble zinc salt, the surface defects of a protective film formed on the metal surface can be reduced, and the protective film is more uniform and compact and can be kept stable in a wider water quality range; therefore, the phosphorus-free corrosion and scale inhibitor can be used in a wide water quality range, and even can be used in cooling water with water wave fluctuation and process leakage.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a phosphorus-free corrosion and scale inhibitor and its preparation method and application. Background technique [0002] The operation of the circulating cooling water system must solve the three major problems of corrosion, scaling and deposition, and microorganisms. At present, chemical treatment is an important means to solve these three major problems. During the operation of cooling water, various chemicals such as corrosion inhibitors, scale inhibitors, fungicides, etc. are continuously added to the system to prevent corrosion, scaling and deposition and The occurrence of microbial problems ensures the stable and efficient operation of the cooling water system. Most of the chemicals currently used are phosphorus-containing chemicals, and phosphorus will lead to eutrophication of water bodies. The comprehensive non-phosphate treatment of cooling water is...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12
CPCC02F5/125C02F2103/023C02F2303/08C02F2303/14C02F2303/22
Inventor 杨恒修邓明森何雪沈虎峻邹雪锋李付绍武青青陈令
Owner GUIZHOU EDUCATION UNIV
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