Method for preparing vapour phase inhibitor

A technology of gas phase corrosion inhibitor and benzoic acid, which is applied in the field of preparation of tertiary amine gas phase corrosion inhibitors, can solve the problems of high toxicity of corrosion inhibitors, high cost of corrosion inhibitors, poor corrosion inhibition performance of corrosion inhibitors, etc. Achieve the effect of low molecular structure and large shielding effect

Inactive Publication Date: 2008-03-12
DALIAN MARITIME UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

At present, people are mainly committed to the development and research of corrosion inhibitors with low toxicity, low cost and high corrosion inhibition effect, but there are still many problems, either the corrosion inhibition performance of corrosion inhibitors is not up to standard, or the cost of corrosion inhibitors is relatively low. High, or the toxicity of the corrosion inhibitor is high

Method used

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  • Method for preparing vapour phase inhibitor
  • Method for preparing vapour phase inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Mix 0.1mol of tertiary amine and 0.11mol of toluic acid at 50-70°C, react for 2 hours, add a certain amount of NaOH to the mixture after recrystallization, and then add 70ml of deionized water to adjust the pH Adjust the value to 8~9.

Embodiment 2

[0016] Mix 0.21mol of tertiary amine and 0.20mol of phthalic acid at 50-70°C, react for 4 hours, add a certain amount of NaOH to the mixture after recrystallization, and then add 120ml of deionized water to adjust the pH Adjust the value to 8~9.

Embodiment 3

[0018] Mix 0.1 mol of tertiary amine, 0.05 mol of benzoic acid and 0.06 mol of phthalic acid at 50-70°C and mix evenly. After reacting for 2.5 hours, add a certain amount of NaOH to the mixture after recrystallization, and then add 70ml deionized water, adjust the pH value to 8-9.

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Abstract

The invention discloses a preparing method for a gaseous inhibitor, whose general formula is R2N(CH2)n+1CH(OH)NCH2R2 (n=0-3). Tertiary amine and benzonic acid and their derivant are mixed under 50-70 DEG C, the reacted product is mixed with some de-ionized water in proportion (10-20%):(90-80%), then the pH value is adjusted to be 8-9 with NaOH. The tertiary amine compound can be aromatic amine, fatty amine and heterocyclic ring amine or one or a combination of two from them, the benzonic acid can be a derivant of benzonic acid or phthalic acid, or fatty carboxylic acid compound, or a mixture of one or two of above components.

Description

technical field [0001] The invention relates to a preparation method of a tertiary amine vapor phase corrosion inhibitor (Volatile Corrosion Inhibitor, referred to as VCI), which is used to protect common metals such as iron, zinc, tin, aluminum, copper and their alloys from atmospheric corrosion. Background technique [0002] Atmospheric corrosion of metals is a problem that every country faces in industrial production. According to the statistics of literature [1], the loss caused by atmospheric corrosion in my country accounts for about 2.5% of the national economy every year, causing huge economic losses and harm. Environmental pollution caused by corrosion destroys the ecological balance and endangers human health. The study of corrosion mechanism and protective measures is no longer a purely technical issue, but a series of major social and economic issues related to resource protection, energy conservation, environmental protection, normal production and personal safe...

Claims

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Application Information

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IPC IPC(8): C23F11/02
Inventor 梁成浩高国
Owner DALIAN MARITIME UNIVERSITY
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