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Compound containing multielement alkamines, and preparation method and application thereof

A technology for amino alcohols and compounds, which is applied in the preparation of amino hydroxy compounds, the preparation of organic compounds, chemical instruments and methods, etc. Weakness and other problems, to achieve the effect of dense protective film, improved corrosion resistance, and stable adsorption

Active Publication Date: 2014-04-16
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of rust inhibitor has a large volatilization loss during the application process, and the effective utilization rate and long-term rust resistance are greatly affected
At the same time, most of these molecules have only a single adsorption center, and the competitive adsorption with aggressive substances is relatively weak in harsh corrosive environments, resulting in a large amount of actual use and high application costs.

Method used

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  • Compound containing multielement alkamines, and preparation method and application thereof
  • Compound containing multielement alkamines, and preparation method and application thereof
  • Compound containing multielement alkamines, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 18.5g epichlorohydrin and join in the reactor that 10ml water is housed, keep reaction temperature 20 ℃, add 18g dimethylamine and 0.27g AlCl while stirring 3 (The molar ratio of the three substances, 1:2:0.001), continued stirring for 4 hours, then stopped stirring, and added 10 mL of 30% NaOH solution to obtain a dibasic amino alcohol compound.

[0036] The yield of the above-mentioned derivatives having an aminoalcohol structure was determined to be 93% by liquid chromatography. After the above-mentioned derivatives with aminoalcohol structure are purified by column chromatography (using silica gel as filler, the eluent is composed of acetone and ethyl acetate mixed, wherein the volume ratio of acetone and ethyl acetate is 1:10), The structure was confirmed by proton nuclear magnetic resonance spectrum and infrared spectrum, and the results are as follows:

[0037] 1H-NMR (400MHz, CDCl3, δ, ppm) δ2.5(s, 12H), 2.3(d, J=6.4Hz, 4H), 3.5(t, 1H), 3.6(d, OH, 1H);

...

Embodiment 2

[0042] Get 18.5g epichlorohydrin and join in the reactor that 10ml water is housed, after being warmed up to 60 ℃, add 44.4g di-n-propylamine and 0.54g zinc dichloride while stirring (three kinds of material molar ratio, 1: 2.2 : 0.002), keep the reaction temperature at 60°C, continue to stir and react for 4h, then stop heating. After cooling, add 10 mL of 30% NaOH solution and stir evenly to obtain a derivative with an amino alcohol structure.

[0043] The yield of the above-mentioned derivatives having an aminoalcohol structure was determined to be 91% by liquid chromatography. After the above-mentioned derivatives with aminoalcohol structure are purified by column chromatography (using silica gel as filler, the eluent is composed of acetone and ethyl acetate mixed, wherein the volume ratio of acetone and ethyl acetate is 1:15), The structure was confirmed by proton nuclear magnetic resonance spectrum and infrared spectrum, and the results are as follows:

[0044] 1H-NMR (...

Embodiment 3

[0049] Get 18.5g epichlorohydrin and join in the reactor that 10ml dehydrated alcohol is housed, after being warmed up to 50 ℃, add 36g ethylenediamine and 1.63g iron trichloride (three kinds of material mol ratios, 1: 3:0.005), keep the reaction temperature at 50°C, continue to stir and react for 8 hours, then stop heating, add 10mL 30% NaOH solution after cooling and stir evenly to obtain derivatives with aminoalcohol structure.

[0050] The yield of the above-mentioned derivatives having an aminoalcohol structure was determined to be 92% by liquid chromatography. After the above-mentioned derivatives with aminoalcohol structure are purified by column chromatography (using silica gel as filler, the eluent is composed of acetone and ethyl acetate mixed, wherein the volume ratio of acetone and ethyl acetate is 1:10), The structure was confirmed by proton nuclear magnetic resonance spectrum, infrared spectrum and gas chromatography-mass spectrometry. The results are as follows:...

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PUM

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Abstract

The invention relates to a compound containing multielement alkamines, and a preparation method and application thereof as a concrete corrosion inhibitor. When being used as a concrete corrosion inhibitor, the compound containing multielement alkamines can enhance the adsorptive capacity for iron atoms, prevent the corrosion inhibitor from volatilization and loss, and enhance the corrosion resistance. The structural formula of the compound containing multielement alkamines is disclosed as (I), wherein R1 is H, R2 is -(CH2CH2NH)mH or -(CH2)nNH2, and m and n are respectively a whole number ranging from 2 to 6; or R1 and R2 are respectively one of -CH3, -CH2CH3, -CH2CH2CH3, -CH2CH2CH2CH3, -CH(CH3)2, -CH2CH(CH3)2, -CH(CH2)5(cyclohexyl) or -C(CH3)2CH2CH3. The compound containing multielement alkamines is prepared by reacting epoxide and organic amine under the action of a catalyst.

Description

technical field [0001] The invention relates to a compound containing polyhydric amino alcohols, its preparation method and application. Background technique [0002] Reinforced concrete is currently the most widely used building material. Under normal circumstances, due to the strong alkaline environment inside the concrete, an oxide film will form on the surface of the steel bar, and no corrosion will occur. However, under harsh conditions such as marine environment, deicing salt, and saline-alkali land, steel bars in concrete usually undergo severe corrosion, which leads to concrete cracking and a decrease in structural bearing capacity, resulting in huge economic losses. According to reports, steel corrosion is the most important factor affecting the durability of concrete structures. Preventing and controlling the corrosion of steel bars is an important way to ensure the safety and durability of structures in service. [0003] At present, the treatment methods to pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/18C07C213/04C04B24/12C04B103/61
Inventor 刘加平陈翠翠蔡景顺缪昌文刘建忠
Owner JIANGSU SOBUTE NEW MATERIALS
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