A kind of open high oxygen-containing circulating cooling water corrosion inhibitor and its preparation method and application

A technology of circulating cooling water and high oxygen content, which is applied in the field of metal anti-corrosion materials, can solve the problems of limited corrosion inhibition effect, and achieve the effect of simple preparation method, simple production process and excellent corrosion inhibition performance

Active Publication Date: 2021-05-04
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of high oxygen content, the corrosion inhibition effect of existing corrosion inhibitor products is limited, how to develop new corrosion inhibitors for high oxygen content corrosion environment has become a problem to be solved

Method used

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  • A kind of open high oxygen-containing circulating cooling water corrosion inhibitor and its preparation method and application
  • A kind of open high oxygen-containing circulating cooling water corrosion inhibitor and its preparation method and application
  • A kind of open high oxygen-containing circulating cooling water corrosion inhibitor and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0040] 1. Preparation of open-type high-oxygen circulating cooling water corrosion inhibitor and detection of corrosion inhibition effect:

[0041]1) Catalyze reaction of hydroxyethylethylenediamine and ethylene oxide at a molar ratio of 1:1 under alkaline conditions at 50°C for 2 hours. After the reaction is completed, add 1 molar ratio of gluconic acid and react at a temperature of 120°C 4h, and then the temperature was raised to 190°C, and reacted for 8 hours to obtain a water-soluble imidazoline gluconate mixture. The infrared spectrogram of gained imidazoline gluconate is as attached figure 1 shown at 1600cm -1 、1556cm -1 There is a strong absorption peak at 1600cm -1 Nearby is the characteristic absorption peak of imidazoline C=N double bond absorption peak, 1556cm -1 where is the C-N single-bond stretching vibration. And at 1610cm -1 There is an absorption band nearby, indicating that the reaction product is an imidazoline product.

[0042] 2) Mix 10 parts by wei...

Embodiment 2

[0047] 1. Preparation of open-type high-oxygen circulating cooling water corrosion inhibitor and detection of corrosion inhibition effect:

[0048] 1) Catalyze reaction of hydroxyethylethylenediamine and ethylene oxide at a molar ratio of 1:1 under alkaline conditions at 60°C for 2 hours. After the reaction is completed, add 1 molar ratio of gluconic acid and react at a temperature of 130°C 4h, and then the temperature was raised to 190°C, and reacted for 8 hours to obtain a water-soluble imidazoline gluconate mixture.

[0049] 2) Mix 10 parts by weight of the water-soluble imidazoline gluconate mixture obtained in 1), with 3 parts by weight of zinc citrate, 6 parts by weight of sodium borate, 3 parts by weight of polyaspartic acid, 2 parts by weight Sodium tungstate, 6 parts by weight of sodium molybdate, 4 parts by weight of zinc acetate, 2 parts by weight of ethylenediamine tetramethylene phosphoric acid, 1 part by weight of pentasodium diethylenetriaminepentamethylene phos...

Embodiment 3

[0054] 1. Preparation of open-type high-oxygen circulating cooling water corrosion inhibitor and detection of corrosion inhibition effect:

[0055] 1) Catalyze reaction of hydroxyethylethylenediamine and ethylene oxide at a molar ratio of 1:1 under alkaline conditions at 70°C for 2 hours. After the reaction is completed, add gluconic acid in a molar ratio and react at a temperature of 140°C 4h, and then the temperature was raised to 200°C, and reacted for 8 hours to obtain a water-soluble imidazoline gluconate mixture.

[0056] 2) Mix 8 parts by weight of the water-soluble imidazoline gluconate mixture obtained in 1), with 2 parts by weight of zinc citrate, 7 parts by weight of sodium borate, 2 parts by weight of polyaspartic acid, 2 parts by weight Sodium tungstate, 5 parts by weight of sodium molybdate, 3 parts by weight of zinc acetate, 1 part by weight of ethylenediaminetetramethylene phosphoric acid, 2 parts by weight of pentasodium diethylenetriaminepentamethylene phosph...

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Abstract

The invention provides an open high-oxygen circulating cooling water corrosion inhibitor and its preparation method and application. The corrosion inhibitor components include: 5-10% imidazoline monosaccharide acid solution, 1-3% zinc citrate, 5-8% sodium borate, 2-4% polyaspartic acid, 1-2% sodium tungstate, 4-7% sodium molybdate, 1-5% zinc acetate, 2-3% ethylenediamine tetramethylene base phosphoric acid, 1-2% pentasodium diethylenetriaminepentamethylene phosphonate and 2-4% hydroxyphosphonoacetic acid, and the balance is water; Ethylenediamine is used as a raw material, and hydroxyethylethylenediamine is first epoxidized, and then synthesized by acylation and cyclization. The corrosion inhibitor for open-type high-oxygen circulating cooling water has a good anti-corrosion effect on pipelines and equipment in high-oxygen open-type circulating cooling water systems. The addition amount is 0.5% and the temperature does not exceed 80°C. The corrosion inhibition efficiency is ≥ 95%, corrosion rate ≤ 0.05mm / a, physical properties meet the requirements of the standard Q / SYTZ0178-2012 "Technical Requirements and Test Methods for Sewage Corrosion Inhibitors".

Description

technical field [0001] The invention belongs to the technical field of metal anti-corrosion materials, and specifically relates to an open-type high-oxygen circulating cooling water corrosion inhibitor and its preparation method and application, which mainly solves the problems of pipelines and equipment in the high-oxygen open-type circulating cooling water system Corrosion issues. Background technique [0002] The open circulating cooling water system includes cooling towers, open reservoirs, circulating pipelines, water pumps and other parts. During the working process of the open circulating cooling water system, the spray water directly contacts the air during the heat exchange process, and the stored water in the open reservoir is exposed to the air environment. The spray process makes the circulating water dissolve more O 2 , The equipment and pipelines of the open circulating cooling water system are made of carbon steel, and the circulating water is very corrosive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/08C23F11/14
Inventor 李玲杰张彦军杨耀辉张盈盈张红磊王志涛蒋林林赵玉飞林竹郭继银苏碧煌
Owner BC P INC CHINA NAT PETROLEUM CORP
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