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Preparation method of water quality stabilizing agent

A water quality stabilizer and compound technology, which is applied in the field of water quality stabilizer preparation, can solve the problems of inappropriateness, complex and changeable materials, complicated technological process, etc., and achieve the effect of strong stability

Inactive Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the circulating cooling water system of the petrochemical industry, due to the complex process, the materials in each process that the cooling water contacts are complex and changeable, and the operating temperature range of the heat exchanger is wide, so the traditional water quality is highly targeted to stabilize the water quality. The practice of agent configuration is no longer appropriate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The hanging piece is made of carbon steel (the same below)

[0015] Preparation of water quality stabilizer: maleic acid-acrylic acid copolymer 15%, carboxylate-sulfonate-nonionic terpolymer 25%, 2-phosphonic acid butane-1,2,4 tricarboxylic acid 30% , zinc sulfate 8%, water 22%, mix and stir evenly.

[0016] Put it in the industrial circulating water of a chemical plant at a concentration of 20mg / l, the water quality is pH9.01, the total hardness (as CaCO 3 Calculated, the same below) 653.4, the temperature is about 60 ℃, after 30 days of operation, the corrosion rate of the coupon is 0.108mm / a, and the scale inhibition rate is 90.50%.

Embodiment 2

[0018] Preparation of water quality stabilizer: 15% maleic acid-acrylic acid copolymer, 25% ethylenediamine tetramethylene phosphonic acid, 30% carboxylate-sulfonate-nonionic terpolymer, 8% zinc sulfate, Water 22%, mix and stir evenly.

[0019] Put it in the industrial circulating water of a chemical plant at a concentration of 40mg / l. The water quality is pH9.01, the total hardness is 653.4, and the temperature is about 60°C. After 30 days of operation, the corrosion rate of the coupon is 0.034mm / a, and the scale inhibition rate is 94.19%.

Embodiment 3

[0021] Preparation of water quality stabilizer: 20% of acrylic acid-hydroxypropyl acrylate copolymer, 25% of diethylene triamine pentamethylene phosphonic acid, 5% of acrylic acid-acrylate-sulfonate terpolymer, 10% of zinc sulfate, 40% water, mix and stir evenly.

[0022] Put it in the industrial circulating water of a chemical plant at a concentration of 60mg / l. The water quality is pH8.35, the total hardness is 456.0, and the temperature is about 80°C. After 30 days of operation, the corrosion rate of the coupon is 0.048mm / a, and the scale inhibition rate is 93.50%.

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Abstract

The invention relates to a preparation method of a water quality stabilizing agent. The water quality stabilizing agent prepared with the method is mainly compounded by using polycarboxylic acid, organic phosphonic acid compound, phosphine carboxylic acid compound, sulphonate compound, zinc salt, and the like. The agent has the advantages of high efficiency, low toxicity, and long-time storage. The compounding method and application method are simple and practical. The agent is suitable for corrosion prevention and scale prevention of circulating cooling water systems of petrochemical enterprises. A carbon steel corrosion rate can reach 0.010mm / a, and a scale inhibition rate can reach 95.30%.

Description

technical field [0001] The invention relates to a preparation method of a water quality stabilizer. The water quality stabilizer prepared by this method is mainly composed of polycarboxylic acid, organic phosphonic acid compound, phosphine carboxylic acid compound, sulfonate compound and zinc salt. It has the characteristics of high efficiency, low toxicity and storage resistance. The method and method of use are simple and practical. It is suitable for anti-corrosion and anti-scaling of circulating cooling water systems in petrochemical enterprises. The corrosion rate of carbon steel can reach 0.010mm / a, and the anti-scaling rate can reach 95.30%. Background technique [0002] During the circulation of the cooling water, the temperature of the water raised after passing through the heat exchange equipment is lowered by the cooling tower. When the circulating water passes through the cooling tower, part of the water will be evaporated and lost, so the content of various min...

Claims

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Application Information

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IPC IPC(8): C02F1/00
Inventor 徐风华程立泉瞿亚平肖朝晖杨萍
Owner CHINA PETROLEUM & CHEM CORP
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