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Phosphorus-free composite corrosion and scale inhibitor for bitter circulating water and preparation method thereof

A corrosion and scale inhibitor, water circulation technology, applied in the direction of chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc., can solve the problem of scaling corrosion and corrosion in high salt content systems and other problems, to achieve the effect of simple and convenient preparation method and good stability

Active Publication Date: 2015-09-09
INLEN CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, it cannot effectively solve the problems of zinc salt deposition, system scaling and corrosion under high salt content and high pH conditions, especially the corrosion of carbon steel and stainless steel caused by high Cl- content water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and acrylic acid-acrylic acid ester-sulfonate terpolymer into the reaction equipment in sequence at 20°C, and then add sodium molybdate, sodium humate, urethane Lotropine and fluorescent tracer, and then benzotriazole and caustic soda that have been dissolved in deionized water are added to the reaction equipment, stirred evenly and left to stand, that is, the phosphorus-free composite retarder for brackish water circulating water is obtained. corrosion inhibitors. The weight percentage of each raw material is: sodium molybdate 15%, urotropine 15%, polyepoxysuccinic acid 22%, azole derivatives 3%, hydrolyzed polymaleic anhydride 13%, acrylic acid-acrylic acid ester- Sodium sulfonate terpolymer 12%, sodium humate 5%, sodium 1,3,6,8-pyrene tetrasulfonate 0.3%, caustic soda 1.5%, deionized water 13.2%.

[0027] Through the dynamic simulation test, the service performance of the obtained product is determined. Th...

Embodiment 2

[0030] Add polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and acrylic acid-acrylic acid ester-sulfonate terpolymer into the reaction equipment in sequence at 40°C, and then add sodium molybdate, sodium humate, urethane Lotropine and fluorescent tracer, then tolutriazole and caustic soda that have been dissolved in deionized water are added to the reaction equipment, stirred evenly and then left to stand, that is, the phosphorus-free Composite corrosion and scale inhibitor. The weight percentage of each raw material is: sodium molybdate 20%, urotropine 12%, polyepoxysuccinic acid 18%, azole derivatives 2%, hydrolyzed polymaleic anhydride 10%, acrylic acid-acrylic acid ester- Sodium sulfonate terpolymer 10%, sodium humate 8%, sodium 1,3,6,8-pyrene tetrasulfonate 0.2%, caustic soda 1.0%, deionized water 18.8%.

[0031] The experimental method is the same as in Example 1, the actual measured data: carbon steel corrosion rate: 0.016mm / a, stainless steel corrosion rate 0.0...

Embodiment 3

[0033] Add polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and acrylic acid-acrylic acid ester-sulfonate terpolymer into the reaction equipment in turn at 25°C, and then add sodium molybdate, sodium humate, urethane Lotropine and fluorescent tracer, and then benzotriazole and caustic soda that have been dissolved in deionized water are added to the reaction equipment, stirred evenly and left to stand, that is, the phosphorus-free composite retarder for brackish water circulating water is obtained. corrosion inhibitors. The weight percentage of each raw material is: sodium molybdate 8%, urotropine 18%, polyepoxysuccinic acid 25%, azole derivatives 2.0%, hydrolyzed polymaleic anhydride 5%, acrylic acid-acrylic acid ester- Potassium sulfonate terpolymer 10%, sodium humate 15%, sodium 1,3,6,8-pyrene tetrasulfonate 0.2%, caustic soda 1.0%, deionized water 15.8%.

[0034]The experimental method is the same as in Example 1, and the actual measured data: carbon steel corrosio...

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Abstract

The invention relates to a phosphorus-free composite corrosion and scale inhibitor for bitter circulating water and a preparation method thereof, belonging to the technical field of water treatment. The phosphorus-free composite corrosion and scale inhibitor for bitter circulating water is prepared from the following raw materials in percentage by weight: 5-20% of sodium molybdate, 5-20% of urotropine, 10-30% of polyepoxysuccinic acid, 1-5% of azole derivative, 5-20% of hydroxypropyl methacrylate, 5-15% of acrylic acid-acrylate-sulfonate terpolymer, 5-15% of sodium humate, 0.1-1% of fluorescent tracer, 0.5-2% of caustic soda flakes and the balance of deionized water. The phosphorus-free composite corrosion and scale inhibitor for bitter circulating water can not interfere with other water treatment agents, is free of phosphorus, zinc and other components harmful to the environment, and can effectively solve the problems of corrosion and scales in the bitter-based high-salt-content high-pH system. The invention also relates to a simple and convenient preparation method.

Description

technical field [0001] The invention relates to a phosphorus-free composite corrosion and scale inhibitor for brackish water circulating water and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] With the development of my country's industry, the consumption of fresh water has increased rapidly, and many areas are facing a serious water crisis. Among urban water consumption, industrial water accounts for about 60-80% of the water consumption, while industrial cooling water consumption accounts for 70-80% of the entire industrial water consumption. The southeast coastal areas of our country have an important position, and the situation of water resource shortage is more serious, which has seriously restricted the development of industry. Moreover, due to the proximity to the sea in coastal areas, a lot of surface water and groundwater contain high salinity, which is called "brackish water". If it is directly us...

Claims

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Application Information

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IPC IPC(8): C02F5/12C23F11/06
Inventor 邱振华王明祥
Owner INLEN CHEM TECH
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