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Triazole compound, and preparation method and application thereof

A technology for triazoles and compounds, applied in the field of triazoles and their preparation, can solve problems such as scarcity of corrosion inhibitors, and achieve the effects of convenient synthesis, inhibition of damage and low price

Inactive Publication Date: 2013-09-11
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although there have been many reports on seawater corrosion inhibitors for metallic copper, the number of corrosion inhibitors that can be used in actual production is extremely rare, and most of them still use traditional benzotriazole compounds as copper corrosion inhibitors. agent, which brings a series of economic and environmental problems to the production process

Method used

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  • Triazole compound, and preparation method and application thereof
  • Triazole compound, and preparation method and application thereof
  • Triazole compound, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of 5-methyl-1,3,4-thiadiazole-2-thiol, the chemical reaction equation is:

[0025]

[0026] First, react methyl acetate with a molar ratio of 1:1.2 with hydrazine hydrate, heat the oil bath to reflux at 70-80°C, and stop the reaction for 4 hours to obtain acetic acid formic hydrazide. Under (KOH) reaction, mechanical stirring at room temperature for 4 hours to generate the intermediate product CH 3 CONHNCSSSK, the intermediate product was reacted with excess hydrazine hydrate, under ice-salt bath conditions, concentrated sulfuric acid was added dropwise as a catalyst, and stirred for 3 hours for cyclization to obtain 5-methyl-1,3,4-thiadiazole-2-thiol.

[0027] The compound nuclear magnetic spectrum data are as follows:

[0028] H chemical shift number of peaks SH 13.05 S CH3 2.64 S

[0029] The compound obtained above was subjected to corrosion inhibition experiment treatment, conditions: the experimental mat...

Embodiment 2

[0033] The compound obtained above was subjected to corrosion inhibition experiment treatment, conditions: the experimental material was copper (99.999%), 5-methyl-1,3,4-thiadiazole-2-thiol was formulated as a corrosion inhibitor, and the medium was 3.5 % sodium chloride solution, immerse the red copper product in the medium added with corrosion inhibitor, the temperature is 25°C, pH=7.5, the amount of the medium is 0.5L, 5-methyl-1,3,4-thiadiol in the medium The amount of azole-2-thiol added was 0.0 g.

[0034] The corrosion inhibitor is: dissolve 5-methyl-1,3,4-thiadiazole-2-thiol in cyclohexanone, the weight ratio of which to cyclohexanone is 1:10, and then use The ultrasonic disperser ultrasonically dispersed the mixed solution for 20 minutes to make it completely dissolved; then, the fully dissolved solution was added to the OP-10 emulsifier (Tianjin Damao Chemical Instrument Supply Station), and the addition of the OP-10 emulsifier The weight ratio of cyclohexanone to c...

Embodiment 3

[0037] The compound obtained above was subjected to corrosion inhibition experiment treatment, conditions: the experimental material was copper (99.999%), 5-methyl-1,3,4-thiadiazole-2-thiol was formulated as a corrosion inhibitor, and the medium was 3.5 % sodium chloride solution, immerse the red copper product in the medium added with corrosion inhibitor, the temperature is 25°C, pH=7.5, the amount of the medium is 0.5L, 5-methyl-1,3,4-thiadiol in the medium The amount of azole-2-thiol added was 0.015 g.

[0038] The corrosion inhibitor is: dissolve 5-methyl-1,3,4-thiadiazole-2-thiol in cyclohexanone, the weight ratio of which to cyclohexanone is 1:10, and then use The ultrasonic disperser ultrasonically dispersed the mixed solution for 20 minutes to make it completely dissolved; then, the fully dissolved solution was added to the OP-10 emulsifier (Tianjin Damao Chemical Instrument Supply Station), and the addition of the OP-10 emulsifier The weight ratio of cyclohexanone to...

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Abstract

The invention relates to a copper seawater corrosion inhibitor, particularly a triazole compound, and a preparation method and application thereof. The triazole compound is 5-methyl-1,3,4-thiadiazolyl-2-mercaptan of which the structural formula is disclosed as Formula I. The corrosion inhibitor provided by the invention has the advantages of low consumption, small toxicity, high efficiency and strong retention capacity, can effectively inhibit the metallic copper from corrosive attack, and has wide application prospects.

Description

technical field [0001] The invention relates to a seawater corrosion inhibitor for copper, in particular to a triazole compound and its preparation method and application. Background technique [0002] With the continuous consumption of various resources on land, the development and utilization of marine resources has become an inevitable way to solve the current resource depletion. However, seawater is a strong electrolyte solution with strong corrosiveness, which greatly limits the development and utilization of marine resources. Therefore, only by solving the corrosion problem of metal materials in seawater can the development and utilization value of marine resources be truly reflected. [0003] Copper has excellent mechanical strength, machinability, electrical conductivity, thermal conductivity, weldability and other characteristics, and has been widely used in industry, military and civilian fields for a long time. However, although copper ranks after hydrogen in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D285/125C23F11/16
Inventor 李伟华曹琨赵霞田惠文侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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