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Metal corrosion inhibitor and preparation method thereof

A technology of metal corrosion inhibitors and solvents, applied in the field of metal corrosion inhibitors and their preparation, can solve the problems of high difficulty, high cost of metal corrosion inhibitors, and non-environmental protection, and achieve simple operation, short synthesis steps, and low cost Effect

Active Publication Date: 2021-12-17
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the present invention is at least one aspect of the existing metal corrosion inhibitors, which are high in cost, difficult to use, and not environmentally friendly.

Method used

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  • Metal corrosion inhibitor and preparation method thereof
  • Metal corrosion inhibitor and preparation method thereof
  • Metal corrosion inhibitor and preparation method thereof

Examples

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preparation example Construction

[0032] combine figure 1 As shown, the embodiment of the present invention provides a kind of preparation method of metal corrosion inhibitor, comprises the following steps:

[0033] Step S1: Mix and dissolve the α-amino acid, basic reagent and solvent to obtain the first mixed solution; the basic reagent includes hydroxides of alkali metal elements such as sodium hydroxide and potassium hydroxide, and other substances that can participate in the reaction Alkaline reagent.

[0034] Step S2: Slowly add p-tert-butylbenzoyl chloride into the first mixed solution, and keep stirring until the reaction is complete, and the reaction temperature is naturally returned to room temperature from -10°C to 5°C to obtain the second mixed solution. The second mixed liquid is separated and purified to obtain a metal corrosion inhibitor. Wherein p-tert-butylbenzoyl chloride slowly joins in the first mixed solution that contains α-amino acid, helps to control reaction temperature, can release h...

Embodiment 1

[0057] The preparation method of the present embodiment metal corrosion inhibitor is carried out according to the following steps:

[0058] S1: Take 1.49g methionine (Meth) with a balance and add it to a 50mL round-bottomed flask, take 0.8g sodium hydroxide with a balance, add it to the round-bottomed flask, and add 5mL deionized water to dissolve it. The round bottom flask was placed in an ice water bath.

[0059] S2: Take 1.81 mL of p-tert-butylbenzoyl chloride with a syringe, slowly inject it into the round bottom flask, keep stirring during the injection process, keep stirring for 6 hours after the injection is completed, and the temperature naturally returns from -10 ° C to room temperature during the reaction process , after the reaction is over, add excess hydrochloric acid to quench the reaction, then use ethyl acetate to extract, after the extraction is completed, the metal corrosion inhibitor is separated by column chromatography.

[0060] The present embodiment ado...

Embodiment 2

[0068] The difference between this example and Example 1 is that the preparation method of the metal corrosion inhibitor in this example uses cysteine ​​(Cys) instead of methionine (Meth) as the reaction raw material.

[0069] The preparation method of the present embodiment metal corrosion inhibitor is carried out according to the following steps:

[0070] S1: Weigh 0.61g cysteine ​​(Cys) with a balance and add it to a 50mL round bottom flask, take 0.4g sodium hydroxide with a balance, add it to the round bottom flask, and add 5mL deionized water to dissolve it. The round bottom flask was placed in an ice water bath.

[0071] S2: Use a syringe to draw 0.98 mL of p-tert-butylbenzoyl chloride, slowly inject it into the round bottom flask, keep stirring during the injection process, keep stirring for 24 hours after the injection is completed, and the temperature naturally returns from 5 ° C to room temperature during the reaction process. After the reaction is finished, excess ...

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Abstract

The invention provides a metal corrosion inhibitor and a preparation method thereof, and relates to the technical field of metal materials. The preparation method of the metal corrosion inhibitor comprises the following steps: mixing and dissolving alpha-amino acid, an alkaline reagent and a solvent to obtain a first mixed solution; adding 4-tert-butylbenzoyl chloride into the first mixed solution, carrying out continuous stirring till the reaction is completed, obtaining a second mixed solution, separating and purifying the second mixed solution, and obtaining the metal corrosion inhibitor. According to the metal corrosion inhibitor, coordination bonds can be formed between metal corrosion inhibitor atoms and metal atoms, a compact monomolecular film layer is formed on the metal surface so as to slow down metal corrosion, and the preparation method of the metal corrosion inhibitor is short in synthesis step, mild in reaction condition, easy and convenient to operate; the alpha-amino acid, the alkaline reagent and the p-tert-butylbenzoyl chloride are used as raw materials, so the method is wide in source, low in cost, non-toxic, harmless, green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a metal corrosion inhibitor and a preparation method thereof. Background technique [0002] Metal materials are widely used in various fields and are also indispensable raw materials in industrial production. However, due to their own properties, metals are prone to chemical or electrochemical reactions when exposed to the natural environment and are corroded, resulting in damage to the properties of metal materials and resource consumption. loss and safety hazard. [0003] Preventing metal corrosion through metal corrosion inhibitors is one of the best anti-corrosion methods in industrial applications. Compared with other anti-corrosion methods such as electrochemical protection and coating anti-corrosion technology, it has low cost, high efficiency, easy operation and application. However, most of the traditional metal corrosion inhibitors are highly toxic and easily c...

Claims

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Application Information

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IPC IPC(8): C07C319/20C07C319/12C07D207/16C07C231/02C07D233/64C07C323/59C07C233/83C23F11/14C23F11/16
CPCC07C319/20C07C319/12C07D207/16C07C231/02C07D233/64C07C323/59C07C233/83C23F11/145C23F11/161C23F11/16
Inventor 游恒志苏铭浩卿晶沈桂富张颖鹤
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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