Preparation method of a dual-electric type ionic liquid corrosion inhibitor and bactericide
By synthesizing a double-electrode ionic liquid, the toxicity and environmental problems of traditional anti-corrosion and bactericides have been solved, achieving highly efficient metal corrosion prevention and sterilization effects while reducing negative environmental impacts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA UNIV OF PETROLEUM (EAST CHINA)
- Filing Date
- 2024-11-04
- Publication Date
- 2026-05-19
AI Technical Summary
Existing antiseptics and bactericides have problems such as high toxicity, easy volatility, environmental unfriendliness, and difficulty in effectively protecting against both metal corrosion and microbial erosion at the same time.
A novel corrosion inhibitor and bactericide was prepared by synthesizing a double-electrolyte ionic liquid, modifying it with different groups to impart positive and negative charges, improving its corrosion inhibition performance, and introducing bactericidal properties.
It achieves both improved corrosion inhibition performance and excellent bactericidal properties, while reducing environmental impact.
Smart Images
Figure CN119409664B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a dual-electric ionic liquid corrosion inhibitor and bactericide with corrosion inhibition and bactericidal properties, and its preparation method. Background Technology
[0002] Metal corrosion is a type of damage that occurs to metallic materials in the external environment, leading to a significant decrease in various mechanical properties. Meanwhile, in fields such as petrochemicals, the metabolites of microorganisms such as bacteria and algae create anaerobic environments on the surfaces of pipes and equipment, causing microbial erosion and accelerating surface corrosion. In the field of corrosion inhibition and sterilization, ionic liquids exhibit potential application value due to their unique structure and properties. Traditional corrosion inhibitors and bactericides often suffer from high toxicity, volatility, and environmental inconvenience. In contrast, certain types of ionic liquids not only provide effective corrosion inhibition but also, due to their low volatility and low biotoxicity, may reduce environmental impact. Furthermore, by changing the types and ratios of anions and cations, ionic liquids with different functional properties can be designed, thereby achieving selective protection against specific metallic materials or microorganisms. Therefore, this invention synthesizes two ionic liquids by modifying different groups, improving corrosion inhibition performance while introducing dual-electric bactericidal properties, thus preparing a novel dual-electric ionic liquid corrosion inhibitor and bactericide. Summary of the Invention
[0003] The purpose of this invention is to provide a corrosion inhibitor and bactericide that can effectively protect against metal corrosion and provide excellent bactericidal properties, as well as a method for preparing the same, to solve the current problems of metal corrosion hazards and the prevention of bio-corrosion caused by bacteria and microorganisms.
[0004] To achieve the above objectives, this specification provides a method for preparing a dual-electrode ionic liquid with corrosion inhibition and bactericidal properties. The method is characterized in that the synthesized ionic liquid has both positive and negative charges, thereby improving corrosion inhibition performance, introducing bactericidal properties, and having low biotoxicity, which can reduce the impact on the environment.
[0005] The implementation process of this invention is briefly explained below.
[0006] (a) The preparation method of the piperazine ionic liquid involved in this invention:
[0007] (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of aminoethylpiperazine in 5 ml of deionized water and sonicate for 5 min until fully dissolved.
[0008] (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer.
[0009] (3) Slowly add the latter solution dropwise into the flask and connect it to the condenser.
[0010] (4) Place the mixed solution in an oil bath and react for 6 h.
[0011] (5) The product after the reaction is completed is vacuum distilled until it becomes viscous.
[0012] (6) The above product is placed in a vacuum drying oven to dry, so as to obtain the final product pyridine ionic liquid.
[0013] (II) The preparation method of the pyridine ionic liquid involved in this invention:
[0014] (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of 4-aminopyridine in 5 ml of deionized water and sonicate for 5 min until fully dissolved.
[0015] (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer.
[0016] (3) Slowly add the latter solution dropwise into the flask and connect it to the condenser.
[0017] (4) Place the mixed solution in an oil bath and react for 6 h.
[0018] (5) The product after the reaction is completed is vacuum distilled until it becomes viscous.
[0019] (6) The above product is placed in a vacuum drying oven to dry, so as to obtain the final product pyridine ionic liquid.
[0020] Furthermore, in steps (1) and (2), the ultrasonic power is 750 W.
[0021] Furthermore, in steps (1, 2) and (4), the temperature of the oil bath is 60 ℃.
[0022] Furthermore, in steps (i), (ii), and (5), the pressure of vacuum distillation is 1.33 kPa.
[0023] Furthermore, in steps (1, 2) and (6), the vacuum drying oven pressure is 20 Pa, the vacuum drying oven temperature is 60℃, and the drying time is 12 h. Attached Figure Description
[0024] Appendix Figure 1 AC impedance spectra of AEP-BES (a) and 4AP-BES (b).
[0025] Appendix Figure 2 FTIR spectra of AEP-BES (a) and 4AP-BES (b).
[0026] Appendix Figure 3 Corrosion rate and corrosion inhibition efficiency of AEP-BES and 4AP-BES.
[0027] Appendix Figure 4 Macroscopic corrosion morphology of N80 in 1M HCl solutions without corrosion inhibitors (a,d) and with the addition of AEP-BES (b,c) and 4AP-BES (e,f).
[0028] Appendix Figure 5 Fluorescence microscopy images of bacteria without corrosion inhibitor (a), with AEP-BES (b), and with 4AP-BES (c).
[0029] Appendix Figure 6 Bacterial sterilization rates with no corrosion inhibitors (a), with NCDs (b), and with CuCDs (c). Detailed Implementation
[0030] This invention relates to a dual-electric ionic liquid corrosion inhibitor and bactericide with corrosion inhibition and bactericidal properties, and its preparation method. The invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0031] Example 1
[0032] First, weigh 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of aminoethylpiperazine. Add 5 ml of deionized water to each, and sonicate with magnetic stirring for 5 min to ensure complete dissolution. Place the sodium 2-bromoethylsulfonate solution in a two-necked flask and condense it using a condenser. Slowly add the aminoethylpiperazine solution dropwise to the flask over 5 min. Place the flask containing the mixed solution in a 60 ℃ oil bath and react for 6 h. To improve the purity of the product, place the reacted product in a vacuum rotary evaporator and distill it under reduced pressure at 1.33 kPa until it reaches a viscous state. Then, dry the product in a vacuum drying oven at 20 Pa and 60 ℃ for 12 h to obtain the final product, AEP-BES ionic liquid.
[0033] Example 2
[0034] First, weigh 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of 4-aminopyridine. Add 5 ml of deionized water to each, and sonicate with magnetic stirring for 5 min to ensure complete dissolution. Place the sodium 2-bromoethylsulfonate solution in a two-necked flask and condense it using a condenser. Slowly add the 4-aminopyridine solution dropwise to the flask over 5 min. Place the flask containing the mixed solution in a 60 ℃ oil bath and react for 6 h. To improve the purity of the product, place the reacted product in a vacuum rotary evaporator and distill it under reduced pressure at 1.33 kPa until it reaches a viscous state. Then, dry the product in a vacuum drying oven at 20 Pa and 60 ℃ for 12 h to obtain the final product, 4AP-BES ionic liquid.
[0035] Example 3
[0036] In this experiment, the corrosive medium was a 1M HCl solution, and the operating temperature was 25℃. The corrosion inhibitors AEP-BES and 4AP-BES were added to the medium solution in different proportions, resulting in four concentration gradients of 50, 100, 150, and 200 mg / L after addition. The corrosion inhibition efficiency was tested using the static plate method. The steel plates were commonly used N80 steel, and the plate hanging time was 24 hours. The corrosion rate and corrosion inhibition efficiency under different concentration gradients are shown in the attached figure. Figure 3 As shown.
[0037] Parts not described in detail in this embodiment and English abbreviations are common knowledge in this industry and can be found online, so they will not be described here. All the chemical reagents involved are available on the market.
[0038] For any parts not mentioned in this invention, existing technologies can be used as a reference.
[0039] It should be noted that any equivalent substitutions made by those skilled in the art based on the teachings of this invention should be within the scope of protection of this invention.
Claims
1. A method for preparing a dual-electric ionic liquid corrosion inhibitor and bactericide, characterized in that, Includes the following steps: (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of aminoethylpiperazine in 5 ml of deionized water and sonicate until fully dissolved; (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer; (3) Slowly add the latter solution dropwise into the flask and connect it to the condenser; (4) Place the mixed solution in an oil bath and react for 6 h; (5) The product after the reaction is completed is vacuum distilled until it reaches a viscous state; (6) The above product is placed in a vacuum drying oven to dry, so as to obtain the final product piperazine ionic liquid.
2. A method for preparing a dual-electric ionic liquid corrosion inhibitor and bactericide, characterized in that, Includes the following steps: (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of 4-aminopyridine in 5 ml of deionized water and sonicate for 5 min until fully dissolved; (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer; (3) Slowly add the latter solution dropwise into the flask and connect it to the condenser; (4) Place the mixed solution in an oil bath and react for 6 h; (5) The product after the reaction is completed is vacuum distilled until it reaches a viscous state; (6) The above product is placed in a vacuum drying oven to dry, so as to obtain the final product pyridine ionic liquid.
3. The method according to claim 1 or 2, characterized in that: In step (1), the ultrasonic power is 750 W.
4. The method according to claim 1 or 2, characterized in that: In step (4), the temperature of the oil bath is 60 ℃.
5. The method according to claim 1 or 2, characterized in that: In step (5), the pressure of vacuum distillation is 1.33 kPa.
6. The method according to claim 1 or 2, characterized in that: In step (6), the vacuum drying oven pressure is 20 Pa, the drying temperature is 60 ℃, and the drying time is 12 h.