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Carbon steel corrosion inhibitor containing arginine derivative and preparation method and application of carbon steel corrosion inhibitor

A technology of arginine derivatives and corrosion inhibitors, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., to achieve excellent corrosion inhibition effect, good permeability, and the effect of inhibiting foam

Active Publication Date: 2020-10-16
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no patent application for corrosion inhibitors with guanidine compounds as the main active substance, and the development of new corrosion inhibitor formulations containing guanidine compounds has a good market application prospect

Method used

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  • Carbon steel corrosion inhibitor containing arginine derivative and preparation method and application of carbon steel corrosion inhibitor
  • Carbon steel corrosion inhibitor containing arginine derivative and preparation method and application of carbon steel corrosion inhibitor
  • Carbon steel corrosion inhibitor containing arginine derivative and preparation method and application of carbon steel corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of carbon steel corrosion inhibitor containing arginine derivative in the present embodiment is made up of the raw material of following mass percentage:

[0036] Arginine derivatives 45％ sodium sebacate 15％ 2-Propylheptanol polyoxyethylene ether (A 10 EO 9 )

10％ ethanol 10％ Sodium molybdate 1％ Deionized water 19％

[0037] The preparation method of the above-mentioned carbon steel corrosion inhibitor containing arginine derivatives:

[0038] 1. Preparation of Arginine Derivatives

[0039] In a reactor with a stirrer, a thermometer and a water separator, mix 174g (1mol) L-arginine hydrochloride and 258g (2mol) n-octylamine evenly under nitrogen protection, and slowly heat to 100-150 ℃, add 0.5g concentrated sulfuric acid catalyst at the same time, react under stirring condition for 2-3 hours, cool down to 30-40 ℃ after the reaction, then slowly drop 64g (0.5mol) oxalyl chloride in the reactor under the protection...

Embodiment 2

[0045] A kind of carbon steel corrosion inhibitor containing arginine derivative in the present embodiment is made up of the raw material of following mass percentage:

[0046] Arginine derivatives 40％ Sodium Azelate 15％ 2-Propylheptanol polyoxyethylene ether (A 10 EO 3 )

5％ Methanol 15％ Sterol 1.5％ Deionized water 23.5％

[0047] The preparation method of the above-mentioned carbon steel corrosion inhibitor containing arginine derivatives:

[0048] 1. Preparation of Arginine Derivatives

[0049] The preparation process of the arginine derivative is the same as in Example 1.

[0050] 2. Preparation of carbon steel corrosion inhibitor containing arginine derivatives

[0051] Weigh each raw material according to the above mass percentage; add deionized water and low-molecular alcohol into the container, and heat to 40-50°C; then add arginine derivatives, stir thoroughly to dissolve them completely; add to the above solution in ...

Embodiment 3

[0053] A kind of carbon steel corrosion inhibitor containing arginine derivative in the present embodiment is made up of the raw material of following mass percentage:

[0054] Arginine derivatives 30％ sodium glutarate 25％ 2-Hexyldecyl alcohol polyoxyethylene ether (A 16 EO 5 )

10％ Methanol 15％ polymaleic acid 1.2％ Deionized water 18.8％

[0055] The preparation method of the above-mentioned carbon steel corrosion inhibitor containing arginine derivatives:

[0056] 1. Preparation of Arginine Derivatives

[0057] The preparation process of the arginine derivative is the same as in Example 1.

[0058] 2. Preparation of carbon steel corrosion inhibitor containing arginine derivatives

[0059] Weigh each raw material according to the above mass percentage; add deionized water and low-molecular alcohol into the container, and heat to 40-50°C; then add arginine derivatives, stir thoroughly to dissolve them completely; add to the ab...

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Abstract

The invention relates to a carbon steel corrosion inhibitor containing an arginine derivative and a preparation method and application of the carbon steel corrosion inhibitor. According to the technical scheme, the carbon steel corrosion inhibitor containing the arginine derivative is composed of, by mass, 30%-45% of the arginine derivative, 15%-25% of sodium alkyl dicarboxylate, 5%-15% of a nonionic surfactant, 5%-15% of low-molecular-weight alcohol, 0.5%-1.5% of an auxiliary and the balance deionized water. The arginine derivatives are introduced as a main active matter of the corrosion inhibitor, and the main active ingredient, namely the arginine derivative has a plurality of nitrogen atoms with strong electronegativity, a plurality of pairs of lone pair electrons and a large pi conjugate bond, is good in water solubility, good in compounding property, low in ecological toxicity and easy to biodegrade, and has good compatibility with the environment and a human body. The compound corrosion inhibitor is mixed with water without bubbling, and a defoaming agent is not needed. According to the invention, through a method of compounding and synergism of the corrosion inhibitor, thesynergistic effect of the components is fully exerted, so that the corrosion inhibitor has an excellent corrosion inhibition effect, and the corrosion inhibition efficiency reaches 90% or above.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and in particular relates to a carbon steel corrosion inhibitor containing arginine derivatives and a preparation method and application thereof. Background technique [0002] The widely used acidifying corrosion inhibitors in China mainly include imidazoline quaternary ammonium salt, quinoline quaternary ammonium salt, pyridine quaternary ammonium salt, Mannich base quaternary ammonium salt, etc. These corrosion inhibitor molecules are generally composed of polar groups centered on O, N, P, S and other elements with high electronegativity and non-polar groups composed of C and H elements. Phosphorus-containing corrosion inhibitors will cause eutrophication of water bodies, so they are listed as the second type of pollutants; although nitrogen-containing corrosion inhibitors have good corrosion inhibition effects, most of them are heterocyclic compounds, which are highly toxic and ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/10C23F11/08C07C277/08C07C279/14
CPCC23F11/10C23F11/08C07C277/08C07C279/14
Inventor 宋永波牛宇岚郑洪岩姚英
Owner TAIYUAN INST OF TECH
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