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Mixed ionic liquid corrosion inhibitor and preparation method and application thereof

A kind of ionic liquid and mixed type technology, which is applied in the field of preparation of metal corrosion inhibitors, can solve the problems of low acid concentration of corrosive medium and unsatisfactory

Active Publication Date: 2021-06-25
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above studies have proved that ionic liquids have a certain corrosion inhibition ability, the acid concentration of the corrosive medium is low, which cannot meet the industrial steel cleaning process with an acid mass fraction > 10%, and cannot inhibit corrosion in high-concentration acidic environments. effect

Method used

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  • Mixed ionic liquid corrosion inhibitor and preparation method and application thereof
  • Mixed ionic liquid corrosion inhibitor and preparation method and application thereof
  • Mixed ionic liquid corrosion inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the ionic liquid synthesized by urotropine and carboxyethylthiosuccinic acid (CETSA)

[0018] Two raw materials, urotropine (28g, 0.2mol) and CETSA (88.88g, 0.4mol), and 100mL ethanol solvent were added to a four-necked flask under nitrogen protection, and a magnetic stirring rotor was installed, and the flask was placed The reaction was carried out in a magnetic stirrer heated in an oil bath at 70° C. for 24 h.

[0019] After the reaction was over, nitrogen gas was slowly released, and the reaction solution was transferred to a 200mL single-necked flask, placed on a rotary evaporator, and the temperature was set at 60°C until all the ethanol solvent was evaporated. The reaction yield was 95%.

Embodiment 2

[0020] Embodiment 2: the ionic liquid synthesized by urotropine and β-mercaptopropionic acid

[0021] Two kinds of raw materials of urotropine (28g, 0.2mol) and β-mercaptopropionic acid (106.14g, 1mol), and 150mL of acetone solvent were added to a four-necked flask under nitrogen protection, and a magnetic stirring rotor was put into it, The flask was placed in an oil bath heating magnetic stirrer at 40°C for 12 hours.

[0022] After the reaction was over, nitrogen gas was slowly released, and the reaction solution was transferred to a 200mL single-necked flask, placed on a rotary evaporator, and the temperature was set at 45°C until all the acetone solvent was evaporated. The reaction yield was 94%.

Embodiment 3

[0023] Embodiment 3: the ionic liquid synthesized by urotropine and maleic acid

[0024] Two raw materials, urotropine (28g, 0.2mol) and maleic acid (116.07g, 0.8mol), and 150mL of methanol solvent were added to a four-necked flask under nitrogen protection, and a magnetic stirring rotor was placed, The flask was placed in an oil bath heating magnetic stirrer at 60°C for 20 h.

[0025] After the reaction, nitrogen was slowly released, and the reaction liquid was transferred to a 200mL single-necked flask, placed on a rotary evaporator, and the temperature was set at 55°C until all the methanol solvent was evaporated. The reaction yield was 93%.

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Abstract

The invention belongs to the technical field of preparation of metal corrosion inhibitors, and particularly relates to a mixed ionic liquid corrosion inhibitor and a preparation method and application thereof. The mixed ionic liquid corrosion inhibitor is obtained by taking A and B as raw materials through quaternization reaction, wherein A is organic amine, and B is carboxylic acid or halogenated hydrocarbon. The component A is selected from urotropine or quinoline or pyridine or 1,8-naphthyridine or triethylene diamine or diethylenetriamine or triethanolamine or chitosan or dimethylaminoethyl methacrylate; and B is selected from carboxyethyl thiosuccinic acid or mercaptopropionic acid or maleic acid or benzyl chloride. The mixed ionic liquid corrosion inhibitor can play a good corrosion inhibition role in a high-concentration acid environment, and the high-concentration acid environment is closer to an industrial corrosion inhibition environment, so that the mixed ionic liquid corrosion inhibitor is more suitable for industrial corrosion inhibition.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal corrosion inhibitors, in particular to mixed ionic liquid corrosion inhibitors and their preparation methods and applications. Background technique [0002] Metal corrosion is ubiquitous in production and life. Although the problem of metal corrosion is inevitable, the corrosion of metal can be slowed down by methods such as coating protection, changing the surrounding environment of the metal, and adding corrosion inhibitors. Among them, adding corrosion inhibitor is the most convenient and effective method. By changing the type and amount of corrosion inhibitor, the corrosion rate of metal can be significantly slowed down. Ionic liquids have broad application prospects as corrosion inhibitors for metals because of their advantages such as low saturated vapor pressure, good stability, and adjustable structure. [0003] In 2017, Ding Hongxia et al. prepared an anodic imidazole-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14
CPCC23F11/149Y02P20/54
Inventor 高华晶王宏伞影孙健金朝辉
Owner JILIN INST OF CHEM TECH
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