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A kind of urotropine quaternary ammonium salt corrosion inhibitor and its preparation method and application

A technology of urotropine and quaternary ammonium salt, which is applied in the field of urotropine quaternary ammonium salt corrosion inhibitor and its preparation, can solve the problems of reduced corrosion inhibition efficiency and low stability of urotropine, and achieve corrosion inhibition efficiency enhancement, excellent corrosion inhibition efficiency, and simple preparation method

Active Publication Date: 2017-11-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the stability of urotropine is not high, and at higher temperatures, the corrosion inhibition efficiency decreases

Method used

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  • A kind of urotropine quaternary ammonium salt corrosion inhibitor and its preparation method and application
  • A kind of urotropine quaternary ammonium salt corrosion inhibitor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of urotropine quaternary ammonium corrosion inhibitor (X is Br, R is ethyl), its preparation method comprises the following steps:

[0026] 1) Weigh 2.80g (0.02mol) of urotropine and 4.36g (0.04mol) of ethyl bromide, dissolve urotropine in 30ml of chloroform, add ethyl bromide, and mix well to obtain a reaction system;

[0027] 2) Put the reaction system in a constant temperature water bath stirrer, under the conditions of 35°C and air isolation, constant temperature stirring and reflux reaction for 7 hours, and filter while hot to obtain a white powder;

[0028] 3) Add the obtained white powder into chloroform, and stir at 50-60°C for 1-2 hours without air to fully dissolve the remaining urotropine, and filter it while it is hot, and place it in an oven at 60°C After drying for 24 hours, the urotropine quaternary ammonium salt corrosion inhibitor white powder (2-C) was obtained with a yield of 34.2%.

[0029] The product obtained in the present embodiment is ca...

Embodiment 2

[0031] A kind of urotropine quaternary ammonium corrosion inhibitor (X is Br, R is butyl), its preparation method comprises the following steps:

[0032] 1) Weigh 2.80g (0.02mol) of urotropine and 4.11g (0.03mol) of bromobutane, dissolve urotropine in 30ml of chloroform, add bromobutane, and mix well to obtain a reaction system;

[0033] 2) Put the reaction system in a constant temperature water bath stirrer, under the conditions of 68°C and air isolation, constant temperature stirring and reflux reaction for 8 hours, and filter while hot to obtain a white powder;

[0034] 3) Add the obtained white powder into chloroform, and stir at 50-60°C for 1-2 hours without air to fully dissolve the remaining urotropine, and filter it while it is hot, and place it in an oven at 60°C After drying for 24 hours, the urotropine quaternary ammonium salt corrosion inhibitor white powder (4-C) was obtained with a yield of 77.5%.

Embodiment 3

[0036] A urotropine quaternary ammonium corrosion inhibitor (X is Br, R is hexyl), its preparation method may further comprise the steps:

[0037] 1) Weigh 2.80 g (0.02 mol) of urotropine and 4.95 g (0.03 mol) of hexamethylene bromide, dissolve urotropine in 35 ml of chloroform, add hexane bromide, and mix well to obtain a reaction system;

[0038] 2) Put the reaction system in a constant temperature water bath stirrer, under the conditions of 68°C and air isolation, constant temperature stirring and reflux reaction for 8 hours, and filter while hot to obtain a white powder;

[0039] 3) Add the obtained white powder into chloroform, and stir at 50-60°C for 1-2 hours without air to fully dissolve the remaining urotropine, and filter it while it is hot, and place it in an oven at 60°C After drying for 24 hours, the urotropine quaternary ammonium salt corrosion inhibitor white powder (6-C) was obtained with a yield of 45.5%.

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Abstract

The invention discloses a urotropine quaternary ammonium salt corrosion inhibitor and its preparation method and application. The structural formula of the urotropine quaternary ammonium salt is: in the formula, R is ethyl, propyl, n-butyl , n-pentyl, n-hexyl, n-heptyl or n-octyl, X is Br or I, and its preparation method comprises the following steps: 1) dissolving urotropine in an organic solvent, then adding halogenated alkanes, and mixing uniformly to obtain Reaction system; 2) stirring the reaction system, reflux reaction, filtering while hot, to obtain a white powder; 3) cleaning the gained white powder with chloroform, and drying to obtain the urotropine quaternary ammonium salt corrosion inhibitor agent. The urotropine quaternary ammonium salt prepared by the invention has good stability, and it can be used as a corrosion inhibitor, which can exhibit excellent corrosion inhibition efficiency and excellent water solubility at high temperature, and the preparation method involved is simple, and the source of raw materials Extensive and suitable for promotional use.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitors, and in particular relates to a hexatropine quaternary ammonium salt corrosion inhibitor and a preparation method and application thereof. Background technique [0002] According to statistics, the metal loss due to corrosion accounts for about 30% of its annual output in the world. Metal corrosion will not only cause the loss of the metal itself, but also a waste of energy in disguise. In petroleum, chemical, pesticide and other industrial production, accidents such as dripping, leaking and leaking caused by corrosion not only cause economic losses, but also cause the leakage of toxic substances, causing environmental pollution and endangering human life. Therefore, the corrosion problem has been paid more and more attention by countries all over the world. Along with the development and application of corrosion inhibitors, it has received more and more attention. [0003] Hydrochloric acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14
Inventor 刘治田于雪晨张旗高翔
Owner WUHAN INSTITUTE OF TECHNOLOGY