Phosphorus-free scale and corrosion inhibitor and preparation method thereof

A phosphorus-free scale and corrosion inhibitor technology, applied in the preparation of phosphorus-free scale and corrosion inhibitors, water treatment chemicals, phosphorus-free scale and corrosion inhibitors, can solve eutrophication pollution, non-compliance with environmental protection policies, etc. problems, to achieve the effect of strong corrosion resistance, remarkable pollution repelling effect, and fast film forming speed

Inactive Publication Date: 2018-07-06
XIAN JINGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention: the phosphate scale inhibitor can be combined with the higher content of Ca in water 2+ In addition, after the circulating cooling water added with phosphate scale i

Method used

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  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof
  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof
  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This example provides a phosphorus-free scale and corrosion inhibitor for circulating cooling water system, the mass percentage of each component is as follows:

[0030]Lactic acid: 12%;

[0031] Hydrolyzed polymaleic anhydride: 18%;

[0032] Polyepoxysuccinic acid: 10%

[0033] Disodium EDTA: 5%;

[0034] Sodium hydroxide: 5%;

[0035] Zinc chloride: 4%;

[0036] Sodium hydroxyethyl cellulose: 0.2%;

[0037] Deionized water: 45.8%.

[0038] The preparation method of the phosphorus-free scale and corrosion inhibitor described in this embodiment:

[0039] First, add 0.2g sodium hydroxyethylcellulose and 45.8g deionized water into the stirring reactor according to the proportion, start stirring, and after the sodium hydroxyethylcellulose is completely dissolved, add 5g disodium edetate, After 4g of zinc chloride is completely dissolved, add 12g of lactic acid, 18g of hydrolyzed polymaleic anhydride, 10g of polyepoxysuccinic acid, and 5g of sodium hydroxide in propo...

Embodiment 2

[0041] This example provides a phosphorus-free scale and corrosion inhibitor for circulating cooling water system, the mass percentage of each component is as follows:

[0042] Tartaric acid: 20%;

[0043] Hydrolyzed polymaleic anhydride: 15%;

[0044] Polyaspartic acid: 10%

[0045] Citric acid: 5%;

[0046] Potassium hydroxide: 4%;

[0047] Zinc sulfate: 3%;

[0048] Sodium hydroxypropyl methylcellulose: 0.5%;

[0049] Deionized water: 42.5%

[0050] The preparation method of the phosphorus-free scale and corrosion inhibitor described in this embodiment:

[0051] First, add 0.5g sodium hydroxypropyl methylcellulose and 42.5g deionized water into the stirring reactor according to the proportion, start stirring, and after the sodium hydroxypropyl methylcellulose is completely dissolved, add 5g citric acid, 3g After zinc sulfate is completely dissolved, add 20g of tartaric acid, 15g of hydrolyzed polymaleic anhydride, 10g of polyaspartic acid, and 4g of potassium hydroxi...

Embodiment 3

[0053] This example provides a phosphorus-free scale and corrosion inhibitor for circulating cooling water system, the mass percentage of each component is as follows:

[0054] Salicylic Acid: 25%;

[0055] Hydrolyzed polymaleic anhydride: 10%;

[0056] Acrylic copolymer: 20%

[0057] Sodium iminodisuccinate: 3%;

[0058] Potassium hydroxide: 6%;

[0059] Zinc sulfate: 2%;

[0060] Sodium hydroxymethylcellulose: 1%;

[0061] Deionized water: 33%

[0062] Wherein the acrylic acid copolymer is a terpolymer, specifically: acrylic acid-hydroxypropyl acrylate-styrenesulfonic acid copolymer.

[0063] The preparation method of the phosphorus-free scale and corrosion inhibitor described in this embodiment:

[0064] First, add 1g sodium hydroxymethylcellulose and 33g deionized water into the stirring reactor according to the proportion, start stirring, and after the sodium hydroxymethylcellulose is completely dissolved, add 3g sodium iminodisuccinate, 2g a After the zinc sulfat...

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Abstract

The invention discloses a phosphorus-free scale and corrosion inhibitor. The phosphorus-free scale and corrosion inhibitor is a compound prepared from organic carboxylic acid and salt thereof, an organic fatty acid polymer, an organic acid type polymer, a chelating agent and de-ionized water and can form a net-shaped composite film on the surface of metal; the weight percent of each component in the compound is as follows: 10 to 30 percent of the organic carboxylic acid, 10 to 20 percent of the organic fatty acid polymer, 5 to 30 percent of the organic acid type polymer, 1 to 5 percent of thechelating agent and the balance of the de-ionized water. The phosphorus-free scale and corrosion inhibitor also can contain inorganic alkali, zinc salt and a cellulose derivative; the weight percent of the inorganic alkali, the zinc salt and the cellulose derivative in the compound is as follows: no more than 6 percent of the inorganic alkali, no more than 4 percent of the zinc salt and no more than 1 percent of the cellulose derivative. The phosphorus-free scale and corrosion inhibitor disclosed by the invention does not contain phosphorus and is an environment-friendly water treatment medicament; the phosphorus-free scale and corrosion inhibitor has excellent performance and can form one layer of the net-shaped composite film on the surface of the metal; the net-shaped composite film hasa remarkable dirt-repelling effect and can be used for preventing the surface of the metal from being scaled.

Description

technical field [0001] The invention belongs to the technical field of circulating water treatment, and relates to water treatment agents, in particular to a phosphorus-free scale and corrosion inhibitor. The invention also provides a preparation method of the phosphorus-free scale and corrosion inhibitor and its application in circulating cooling water treatment. Background technique [0002] The consumption of industrial cooling water accounts for a relatively large proportion of its total water consumption, and the method of circulating cooling and increasing the concentration ratio is usually used to save water consumption. However, in the process of circulating cooling, due to the increase of water temperature and the evaporation of water, various inorganic ions With the concentration of organic matter, the alkalinity, hardness and pH value of the water naturally rise, causing problems such as inorganic salt precipitation, corrosion and bacteria and algae growth in wate...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12
CPCC02F5/12C02F5/10C02F5/105C02F5/125
Inventor 李佐东张小凤孟丽杨赞
Owner XIAN JINGDA CHEM
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