Surfactant type corrosion inhibitor and preparation method thereof

A technology of surfactants and corrosion inhibitors, applied in the field of organic polymer corrosion inhibitors, can solve the problems of less research, many adsorption active centers, low toxicity, etc., and achieve the effect of improving water solubility

Active Publication Date: 2021-01-22
山东滨州昱诚化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, compared with organic small molecule corrosion inhibitors, polymer corrosion inhibitors are less toxic, have more active sites for adsorption, have a larger adsorption coverage area on the protected substrate, and are easy to form a single-layer or multi-layer dense protective film. In the prior art, there are few studies on polymer surfactant type corrosion inhibitors

Method used

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  • Surfactant type corrosion inhibitor and preparation method thereof
  • Surfactant type corrosion inhibitor and preparation method thereof
  • Surfactant type corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare amino-terminated polyaniline derivatives, denoted as A1.

[0032] Accurately weigh 15.01g (0.14mol) of p-phenylenediamine, 0.06g (0.10mmol) of bis(dibenzylideneacetone) palladium, 5.02g (0.05mol) of sodium tert-butoxide into the reaction kettle, and add 30mL of toluene to dissolve After 15 minutes, 5 mL of tri-tert-butylphosphine was injected, and the temperature was raised to 100 °C, and the toluene solution of 2,5-dihexyl-1,4-dibromobenzene [46.75 g (0.12 mol) dissolved in 60mL of toluene], drop it in 0.5h, keep the temperature for 10h, after the reaction, the solvent was distilled off under reduced pressure to obtain a yellow-brown powder, washed with deionized water 3 times, and dried in a vacuum oven at 50°C for 24h to obtain amino-terminated polyaniline derivative.

[0033] Amino-terminated polyaniline derivatives 1 H-NMR with CDCl 3 As a solvent, the result calculated to obtain the degree of polymerization x is 3, the results refer to the attached fig...

Embodiment 2

[0035] Prepare amino-terminated polyaniline derivatives, denoted as A2.

[0036] Accurately weigh 25.07g (0.23mol) of p-phenylenediamine, 0.06g (0.27mmol) of palladium acetate, 6.06g (0.06mol) of sodium tert-butoxide and add them to the reaction kettle, add 50mL of dioxane to dissolve, and pass in argon After 15 minutes, 0.39g (1.49mmol) tri-tert-butylphosphine was added, and the temperature was raised to 100°C, and the toluene solution of 2,5-dihexyl-1,4-dibromobenzene was added dropwise [78.09g (0.19mol) dissolved in 100mL toluene], drop it in 0.5h, heat preservation reaction 10h, after the reaction is over, the solvent is distilled off under reduced pressure to obtain a yellow-brown sticky substance, after adding dichloromethane to dissolve, after extracting with deionized water for 3 times, distill under reduced pressure, Amino-terminated polyaniline derivatives are obtained.

[0037] Amino-terminated polyaniline derivatives 1 H-NMR with CDCl 3 As a solvent, the result ...

Embodiment 3

[0039] Prepare amino-terminated polyaniline derivatives, denoted as A3.

[0040]Accurately weigh 20.02g (0.19mol) of p-phenylenediamine, 0.06g (0.27mmol) of palladium acetate, 6.18g (0.06mol) of sodium tert-butoxide and add them to the reaction kettle, add 40mL of toluene to dissolve, and blow in argon for 15min Then add 0.4g (1.52mmol) tri-tert-butylphosphine, raise the temperature to 120°C and start to drop the toluene solution of 2,5-dioctyl-1,4-diiodobenzene [73.3g (0.13mol) dissolved in 100mL toluene ], drop it within 1 hour, heat preservation reaction for 12 hours, and remove the solvent under reduced pressure at 100°C after the reaction to obtain a black viscous substance, add dichloromethane to dissolve, extract 3 times with deionized water, and then distill under reduced pressure at 80°C , to obtain amino-terminated polyaniline derivatives.

[0041] Amino-terminated polyaniline derivatives 1 H-NMR with CDCl 3 As a solvent, the result calculated that the degree of p...

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Abstract

The invention discloses a surfactant type corrosion inhibitor and a preparation method thereof, the preparation method is as follows: 1) p-phenylenediamine and 2, 5-dialkyl-1, 4-dihalogenated benzeneare subjected to a Buchwald-Hartwig arylamine reaction to synthesize an amino-terminated polyaniline derivative; 2) carrying out a Schiff base reaction on the amino-terminated polyaniline derivative and quinoline-containing quaternary ammonium salt to prepare a quaternary ammonium salt-terminated polyaniline derivative, namely the surfactant type corrosion inhibitor; the surfactant type corrosioninhibitor is a polyaniline main chain with a relatively low polymerization degree, and hydrophobic long-chain alkane is arranged on a benzene ring so that the regularity of a chain segment of polyaniline is relatively low, the regularity of the main chain is reduced, the water solubility of the main chain is improved, corrosion factors can be repelled in a water medium, and a good corrosion inhibition effect is achieved; wide application prospects are realized in the water system corrosion inhibitor.

Description

technical field [0001] The invention relates to an organic polymer corrosion inhibitor, in particular to a surfactant type corrosion inhibitor and a preparation method thereof. Background technique [0002] In industrial production, corrosion of equipment or pipes in most water systems is a common problem. On the one hand, because water systems often contain a large number of corrosive ions and molecules, such as Cl-, SO 2 And so on, it is very easy to cause corrosion to carbon steel and other metal materials; on the other hand, due to some specific operating steps in the system, such as the method of acid washing in the circulating water system to remove scale, and the acidification process of oil wells in oil field production , so that the system pipe wall is in contact with the acid solution, causing acid corrosion. Corrosion will not only cause system aging and damage, cause environmental pollution, but also bring economic, resource and energy losses to the world. Addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D215/12C23F11/14
CPCC07D215/12C23F11/149C23F11/173
Inventor 张玉花
Owner 山东滨州昱诚化工科技有限公司
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