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Preparation of corrosion and scale inhibitor used for high alkaline high chlorine circulating cooling water

A technology of corrosion and scale inhibitors and circulating cooling water, applied in the field of corrosion and scale inhibitors, can solve the problems of scale inhibition performance reduction, zinc salt precipitation, etc., achieve strong corrosion and scale inhibition capabilities, good thermal stability, The effect of excellent scale inhibition performance

Active Publication Date: 2009-12-23
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the corrosion and scale inhibitors involved have good corrosion and scale inhibition performance in high-calcium and high-chlorine water conditions, they will greatly reduce the scale and scale inhibition performance when used in water systems with high pH values. Salt is easy to precipitate in the form of precipitation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw materials are prepared in parts by weight: 23 parts of polyepoxysuccinic acid, 25 parts of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, 15 parts of corrosion inhibitor synergist, 12 parts of sodium gluconate, alkane 8 parts of base epoxy carboxylates, 2 parts of benzotriazoles, 15 parts of pure water are formed; And through preparation; Wherein:

[0027] a. Preparation of corrosion inhibitor synergist: Take 420 kg of industrial phosphoric acid and add it into the reaction kettle for stirring, then slowly add 140 kg of triethanolamine within 30 minutes, stir evenly for 50 minutes and keep the temperature at 40°C; then add 390 kg of pure water, stir evenly for 20 minutes; add 50 kg of zinc oxide under stirring, stir evenly for 90 minutes and keep the temperature at 40°C until a colorless transparent body is formed;

[0028] b. Adding polyepoxysuccinic acid to 2-phosphonic acid butane-1,2,4-tricarboxylic acid;

[0029] Mix the solutions prepared in steps a and b...

Embodiment 2

[0031] Raw materials are prepared in parts by weight: 24 parts of polyepoxysuccinic acid, 24 parts of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, 12 parts of corrosion inhibitor synergist, 15 parts of sodium gluconate, alkane 5 parts of epoxy carboxylates, 3 parts of benzotriazoles, 17 parts of pure water; and prepared; wherein:

[0032] a. Preparation of corrosion inhibitor synergist, take 400 kg of industrial phosphoric acid and add it to the reaction kettle for stirring, then slowly add 160 kg of triethanolamine within 35 minutes, stir evenly for 60 minutes and keep the temperature at 80°C; then add 400 kg of pure water, stir evenly for 30 minutes; add 40 kg of zinc oxide under stirring, stir evenly for 120 minutes and keep the temperature at 80°C until a colorless transparent body is formed;

[0033] b. Adding polyepoxysuccinic acid to 2-phosphonic acid butane-1,2,4-tricarboxylic acid;

[0034] After mixing the solutions prepared in steps a and b, add alkyl epoxy c...

Embodiment 3

[0036] The raw materials are prepared in parts by weight: 25 parts of polyepoxysuccinic acid, 23 parts of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, 13 parts of corrosion inhibitor synergist, 10 parts of sodium gluconate, alkane 6 parts of epoxy carboxylates, 3 parts of benzotriazoles, 20 parts of pure water; and prepared; wherein:

[0037] a. Preparation of corrosion inhibitor synergist: Take 410 kg of industrial phosphoric acid and add it to the reaction kettle for stirring, then slowly add 150 kg of triethanolamine within 33 minutes, stir evenly for 55 minutes and keep the temperature at 65°C; then add 385 kg of pure water, stir evenly for 22 minutes; add 55 kg of zinc oxide under stirring, stir evenly for 100 minutes and keep the temperature at 65°C until a colorless transparent body is formed;

[0038]b. Adding polyepoxysuccinic acid to 2-phosphonic acid butane-1,2,4-tricarboxylic acid;

[0039] After mixing the solutions prepared in steps a and b, add alkyl epox...

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PUM

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Abstract

The invention provides a preparation of a corrosion and scale inhibitor used for high alkaline high chlorine circulating cooling water which is prepared according to the following parts by weight: 23-25 parts of PESA, 23-25 parts of 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid, 12-15 parts of corrosion and scale inhibitor, 10-15 parts of sodium gluconate, 5-8 parts of alkyl epoxy carboxylate, 2-3 parts of BTA, and 10-20 parts of pure water. The preparation comprises the following steps: adding industrial phosphoric acid of 400-420kg into a reaction kettle for stirring, adding triethanolamine of 140-160kg slowly within 30-35min, stirring for 50-60min, keeping the temperature at 40-80 DEG C, adding pure water of 385-400kg and stirring for 20-30min; adding zinc oxide of 45-55kg under stirring, stirring for 90-120min, and keeping the temperature at 40-80 DEG C to obtain the corrosion inhibition potentiating agent, adding PESA into the 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid to mix with the solution of the corrosion inhibition potentiating agent, sequentially adding alkyl epoxy carboxylate, pure water and sodium gluconate to stir for 30-40min, keeping the temperature at 20-35 DEG C, then adding BTA, stirring for 30-60 min, and keeping the temperature at 20-35 DEG C to obtain the composite corrosion and scale inhibitor.

Description

technical field [0001] The invention relates to a corrosion and scale inhibitor for a circulating cooling water system, and is especially suitable for the preparation of a corrosion and scale inhibitor for a high-alkali and high-chlorine circulating cooling water system. Background technique [0002] The circulating water treatment agents currently used are all used in the range where the conductivity is less than 3000μs / cm, the alkalinity of methyl orange is less than 500mg / L (calculated as calcium carbonate), and the chloride ion content is less than 300mg / L; The alkalinity of methyl orange in the circulating water can reach 1000mg / L, and the chloride ion content can reach 3000mg / L. The actual operation shows the deposition of calcium scale. Cl - It is a strong corrosive ion, because of its small radius, it is easy to penetrate the pores on the surface of the passivation film and cause pitting corrosion; in addition, when scaling, Cl - It can rely on its strong penetrati...

Claims

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Application Information

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IPC IPC(8): C02F5/14
Inventor 曾凡付王刚马莉达
Owner XINJIANG DELAND
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