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Efficient scale and corrosion inhibitor for circulating water and preparation method of efficient scale and corrosion inhibitor

A scale and corrosion inhibitor, circulating water technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. Secondary pollution, poor stability and other problems, achieve a small amount of high-efficiency scale and corrosion inhibition performance, prolong the service life of equipment, and excellent corrosion inhibition effect

Pending Publication Date: 2022-06-21
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the formula of non-phosphorus or low-phosphorus scale and corrosion inhibitors is used in the market at present, the dosing concentration and application effect cannot achieve the expected effect. Inorganic corrosion inhibitors are used in combination. The use of inorganic corrosion inhibitors will not only cause secondary pollution to the environment, but also have poor stability in circulating water. Improper use will cause chemical deposition or precipitation, causing pollution to the system

Method used

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  • Efficient scale and corrosion inhibitor for circulating water and preparation method of efficient scale and corrosion inhibitor
  • Efficient scale and corrosion inhibitor for circulating water and preparation method of efficient scale and corrosion inhibitor
  • Efficient scale and corrosion inhibitor for circulating water and preparation method of efficient scale and corrosion inhibitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of polycarboxylate sulfonate tetrapolymer:

[0039] S1: Add 183Kg of itaconic acid, 216.5Kg of aconitic acid, 3.1Kg of dodecyl mercaptan, 0.5Kg of vanadium pentoxide, and 220Kg of deionized water into the reaction kettle in sequence, start stirring, heat up to 45°C, and dissolve Add 23.6Kg sodium hypophosphite, continue to stir and dissolve;

[0040] S2: After dissolving, heat up to 70°C, and at the same time slowly add 327Kg hydrogen peroxide and 174Kg 58.6wt% 2-acryloyl-2-methylpropanesulfonate aqueous solution, drop slowly for 4.5h, and control the dropping temperature at 95-98 ℃;

[0041] S3: Keep warm at 106-112°C for 3.0h after the dropwise addition;

[0042] S4: lower the temperature to below 50° C., and filter to obtain a brown-red polycarboxylate sulfonate tetrapolymer solution with a solid content of 48.26% and a number average molecular weight of 2750.

Embodiment 2

[0044] Preparation of polycarboxylate sulfonate tetrapolymer:

[0045] S1: Add 176Kg of itaconic acid, 225Kg of aconitic acid, 2.83Kg of dodecyl mercaptan, 0.5Kg of vanadium pentoxide, and 220Kg of deionized water into the reactor in sequence, start stirring, and heat up to 45°C to dissolve;

[0046] S2: Inhale 332.7Kg of hydrogen peroxide into the head tank 1;

[0047] S3: Dissolve 97Kg of sodium 2-acryloyl-2-methylpropanesulfonate in 75Kg of deionized water, and suck it into the head tank 2;

[0048] S4: Open the manhole of the reaction kettle, put 25.3Kg of sodium hypophosphite into the reaction kettle and continue to stir and dissolve;

[0049] S5: After the dissolution in the reaction kettle is completed, the temperature is raised to 70°C, and the drop valves of high-level tank 1 and high-level tank 2 are opened at the same time, and the dropwise addition is performed slowly for 6 hours, and the dropping temperature is controlled at 95-98°C;

[0050] S6: Keep warm at 10...

Embodiment 3

[0053] Preparation of a high-efficiency scale and corrosion inhibitor for circulating water:

[0054] S1: Weigh 40Kg polycarboxylate sulfonate tetrapolymer P1, 25Kg adsorption polymer corrosion inhibitor, 20Kg S-carboxyethyl thiosuccinic acid, 5Kg methyl benzotriazole, 10Kg polyepoxy Sodium succinate, 5Kg deionized water;

[0055] S2: Add the above-mentioned polycarboxylate sulfonate tetrapolymer, adsorptive polymer corrosion inhibitor, S-carboxyethylsulfosuccinic acid, polycarboxylic acid and its salt into the reaction kettle in sequence, and stir at room temperature for 25 minutes ;

[0056] S3: Add azole derivatives into the reaction kettle, raise the temperature to 40°C, and stir for 20 minutes;

[0057] S4: Add deionized water into the reaction kettle, stir evenly at 35°C for 30 minutes, and filter to obtain a high-efficiency scale and corrosion inhibitor.

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Abstract

The invention discloses an efficient scale and corrosion inhibitor for circulating water and a preparation method of the efficient scale and corrosion inhibitor. The efficient scale and corrosion inhibitor is prepared from the following raw materials in parts by weight: 30 to 45 parts of polycarboxylic acid sulfonate quadripolymer, 20 to 35 parts of adsorptive macromolecular corrosion inhibitor, 15 to 25 parts of S-carboxyethyl thiosuccinic acid, 3 to 8 parts of azole derivative, 10 to 15 parts of polycarboxylic acid and salt thereof and 0 to 20 parts of deionized water. The polycarboxylic acid sulfonate quadripolymer is formed by copolymerization of itaconic acid, aconitic acid, sodium hypophosphite and 2-acryloyl-2-sodium methylpropanesulfonate. The pure organic efficient scale and corrosion inhibitor has a small amount of efficient scale and corrosion inhibition performance and wide practicability, has an excellent corrosion inhibition effect on equipment made of carbon steel, stainless steel, copper and the like, and can effectively prolong the service life of the equipment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a high-efficiency scale and corrosion inhibitor for circulating water and a preparation method thereof. Background technique [0002] At present, most of my country's water treatment chemicals are developed by analysis, imitation or based on foreign patents. In addition, the development of my country's water treatment chemicals industry is relatively short, and scientific research funds are limited, resulting in weak foundation, backward technology, and low overall level. Especially in special water quality and cutting-edge technology, there is still a certain gap with foreign countries, which is mainly reflected in the serialization of new environmentally friendly water-soluble copolymer water treatment chemicals. [0003] The new water-soluble antiscalant has a huge system and many types, and the related technology research is perfect. However, with the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12C23F11/14C23F11/16C23F11/173C08F222/02C08F220/58
CPCC02F5/10C02F5/12C23F11/173C23F11/16C23F11/149C08F222/02C02F2303/08C08F220/585
Inventor 张留成徐旭东刘月英刘娅林王富生梁新新王金明张雷刘文峰高松
Owner SHANDONG TIANQING TECH DEV
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