Preparation method and application of 2-bromoisophthalaldehyde acetal 2-aminofluorene bis-Schiff base corrosion inhibitor
The technology of bromoisophthalaldehyde and bis-Schiff base is applied in the field of preparation of 2-bromoisophthalaldehyde 2-aminofluorene bis-Schiff base corrosion inhibitor, which can solve the problem of depositing on the heat transfer surface of a heat exchanger. , the heat transfer efficiency of the heat exchanger is reduced, the equipment tube wall is corroded and perforated, etc., to achieve the effect of good corrosion inhibition, easy operation, and enhanced adsorption performance.
Active Publication Date: 2022-04-26
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
The cooling water is continuously recycled in the circulation system. Due to the increase of water temperature, the change of flow rate, evaporation, and the concentration of various inorganic ions and organic substances, the cooling tower and cooling water pool are exposed to sunlight, wind and rain, dust and debris outdoors. The entry of water, as well as the combined effect of various factors such as the structure and materials of the equipment, will cause many problems, such as the circulating cooling water will be concentrated due to evaporation, and carbonate will be deposited on the heat transfer surface of the heat exchanger, resulting in scale adhesion, resulting in heat transfer The heat transfer efficiency of the device decreases; the dissolved oxygen, existing chloride ions, sulfate ions, and microorganisms in the circulating cooling water will cause corrosion and perforation of the pipe wall of the equipment, forming leakage, and affecting safe production
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[0020] (1) Weigh 0.3987g of 2-aminofluorene and 0.2130g of 2-bromoisophthalaldehyde, respectively, and dissolve them in 15mL of absolute ethanol to prepare 2-aminofluorene ethanol solution and 2-bromoisophthalaldehyde ethanol solution.
[0021] (2) Place the 2-aminofluorene ethanol solution in step (1) in a 50mL three-necked flask, add 3 drops of acetic acid, then add the 2-bromoisophthalaldehyde ethanol solution in step (1), and place the three-necked flask In a constant temperature water bath, the temperature was set to 45°C, magnetically stirred, and the reaction was carried out under nitrogen protection. The whole reaction process was followed by TLC spot plate. The developer was dichloromethane (DCM):petroleum ether (PE)=6:5, and the reaction After 7 hours, there is no longer 2-bromoisophthalaldehyde in the spot plate, stop the reaction, cool down to room temperature naturally, filter under reduced pressure, and continuously rinse the filter cake with absolute ethanol to r...
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The invention discloses a preparation method and application of a 2-bromoisophthalaldehyde acetal 2-aminofluorene bis-Schiff base corrosion inhibitor. The present invention obtains 2-bromoisophthalaldehyde acetal 2-aminofluorene bis-Schiff base by mixing 2-bromoisophthalaldehyde ethanol solution and 2-aminofluorene ethanol solution, and then uses water as a solvent to prepare 2 ‑Bromoisophthalaldehyde acetal 2‑aminofluorene bis-Schiff base corrosion inhibitor. 2‑bromoisophthalaldehyde acetal 2‑aminofluorene bis-Schiff base contains two C=N functional groups, which enhances its adsorption on the surface of carbon steel. The circulating cooling water of chloride ion, sulfate ion and microorganism maintains a high corrosion inhibition effect.
Description
technical field [0001] The invention belongs to the field of corrosion inhibitors, and in particular relates to a preparation method and application of a 2-bromoisophthalaldehyde acetal 2-aminofluorene bis-Schiff base corrosion inhibitor. Background technique [0002] Circulating cooling water is a major part of industrial water consumption. In petrochemical, electric power, steel, metallurgy and other industries, the consumption of circulating cooling water accounts for 50-90% of the total water consumption of enterprises. The cooling water is continuously recycled in the circulation system. Due to the increase of water temperature, the change of flow rate, evaporation, and the concentration of various inorganic ions and organic substances, the cooling tower and cooling water pool are exposed to sunlight, wind and rain, dust and debris outdoors. The entry of water, as well as the combined effect of various factors such as the structure and materials of the equipment, will c...
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IPC IPC(8): C07C249/02C07C251/24C23F11/14
CPCC07C249/02C23F11/146C07C251/24
Inventor 刘峥韦文厂梁秋群王胜韩佳星
Owner GUILIN UNIVERSITY OF TECHNOLOGY