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

A corrosion and scale inhibitor, an environmentally friendly technology, applied in the field of phosphorus-free and environmentally friendly corrosion and scale inhibitors and its preparation, can solve problems affecting the effect of phosphorus-free corrosion and scale inhibitors, monitoring data deviation, metal corrosion, etc. , to achieve excellent scale inhibition effect, promote integrity and reduce pitting corrosion

Pending Publication Date: 2022-07-26
SHANGHAI WEILAI ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the effect of corrosion and scale inhibitors in water treatment, it is necessary to monitor their concentration in water. However, most of the non-phosphorus corrosion and scale inhibitors in the prior art will add some additional fluorescent agents. It is determined to reflect the concentration of the agent used, but the consumption of the fluorescent agent is not proportional to the consumption of the corrosion and scale inhibitor. Long-term use will cause a large deviation in the monitoring data, which directly affects the effect of the phosphorus-free corrosion and scale inhibitor In addition, many non-phosphorus corrosion and scale inhibitors will inevitably cause partial pitting of the metal during use, which will easily cause further corrosion of the metal

Method used

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

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Effect test

preparation example Construction

[0043] The preparation method of the tracer copolymer specifically comprises the following steps:

[0044] S1: Synthesis of Fluorescent Monomers

[0045] (1) Add 355g of glacial acetic acid and 63g of 4-chloro-1,8-naphthalenedicarboxylic acid anhydride in a 500mL three-necked glass bottle, start stirring, slowly add 30g of 3-dimethylaminopropylamine, and heat the temperature to 110° C. The temperature was cooled to 40°C for 5 hours, the stirring was stopped, the material was discharged into a 5L glass bottle, 2L pure water was added, the stirring was started, 460g of 48% sodium hydroxide was added to adjust the pH to 11, cooled to room temperature, and the stirring was stopped. Remove the liquid to obtain a brownish-yellow solid, bake at 85°C for 5 hours, and pulverize to obtain Intermediate 1;

[0046] (2) add 95g methanol, 26g sodium methoxide, 20g intermediate 1 into a 500mL three-neck glass bottle, start stirring, pass nitrogen for 20 minutes and then heat, the temperatur...

Embodiment 1

[0061] The first aspect of the present embodiment provides a phosphorus-free environment-friendly corrosion and scale inhibitor, which, in parts by weight, includes the following raw materials: 8 parts of inorganic salts, 10 parts of polyepoxysuccinic acid, benzotriazole 0.7 parts of azole, 8.8 parts of polyaspartic acid, 7.5 parts of hydrochloric acid, 2.8 parts of triethanolamine, 20 parts of tracer copolymer, and deionized water to make up to 100 parts.

[0062] The inorganic salt includes zinc chloride, sodium citrate, and lithium molybdate, and the weight ratio of the three is 1:1.5:1.5.

[0063] The polyepoxysuccinic acid was purchased from Nantong Runfeng Petrochemical Co., Ltd., and the polyaspartic acid was purchased from Hebei Synergy Environmental Protection Technology Co., Ltd.

[0064] The mass concentration of the hydrochloric acid is 30%.

[0065] The preparation method of the tracer copolymer specifically comprises the following steps:

[0066] S1: Synthesis ...

Embodiment 2

[0078] The first aspect of the present embodiment provides a phosphorus-free environment-friendly corrosion and scale inhibitor, which, in parts by weight, comprises the following raw materials: 5 parts of inorganic salts, 6 parts of polyepoxysuccinic acid, benzotriazole 0.6 parts of azole, 5.5 parts of polyaspartic acid, 6 parts of hydrochloric acid, 3 parts of triethanolamine, 12 parts of tracer copolymer, and deionized water to make up to 100 parts.

[0079] The inorganic salt includes zinc chloride, sodium citrate, and lithium molybdate, and the weight ratio of the three is 1:1.5:1.5.

[0080] The polyepoxysuccinic acid was purchased from Nantong Runfeng Petrochemical Co., Ltd., and the polyaspartic acid was purchased from Hebei Synergy Environmental Protection Technology Co., Ltd.

[0081] The mass concentration of the hydrochloric acid is 30%.

[0082] The preparation method of the tracer copolymer specifically comprises the following steps:

[0083] S1: Synthesis of F...

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Abstract

The invention provides a non-phosphorus environment-friendly corrosion and scale inhibitor as well as a preparation method and application thereof, and the non-phosphorus environment-friendly corrosion and scale inhibitor is prepared from the following raw materials in parts by weight: 4-12 parts of inorganic salt, 2-15 parts of polyepoxysuccinic acid, 0.5-1 part of benzotriazole, 5-15 parts of polyaspartic acid, 5-10 parts of a pH regulator, 2-4 parts of a surfactant, 10-30 parts of a tracing copolymer and the balance of water, totaling 100 parts. According to the present invention, through the specific component ratio and the preparation method, the slow-release scale inhibition effect is excellent, the protection film can be formed on the metal surface so as to effectively resist pitting corrosion, the specific tracing type polymer is added, such that the stability in the system is high, the influence of other factors is avoided, the use condition of the agent can be accurately monitored, and the application prospect is wide. The slow-release scale inhibitor has an excellent effect when being applied to treatment of industrial circulating cooling water.

Description

technical field [0001] The invention relates to the field of corrosion and scale inhibitor, in particular to a phosphorus-free environment-friendly corrosion and scale inhibitor and a preparation method and application thereof. Background technique [0002] Phosphorus-containing chemicals are used in industrial circulating water treatment on a large scale, but they cause too many phosphorus-containing compounds in industrial discharge water, which intensifies the eutrophication of water, leads to the unbridled growth of algae in the water system, and causes red tides. . In order to meet the requirements of national green environmental protection, the requirements for industrial circulating cooling water treatment are getting higher and higher, and the circulating cooling water system has begun to take "phosphorus reduction" measures. Committed to the development of environmental protection, safety and excellent performance of phosphorus-free corrosion and scale inhibitor. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12C02F1/66C02F103/02
CPCC02F5/125C02F5/105C02F1/66C02F2303/08C02F2305/04C02F2103/023
Inventor 周国平刘建凤沈春雷沈潮杰陆海燕
Owner SHANGHAI WEILAI ENTERPRISE
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