Preparation method, product and application of a corrosion-inhibiting component
A technology of corrosion inhibition and corrosion inhibitor, which is applied in the field of preparation of corrosion inhibition components, can solve the problems of unsatisfactory corrosion inhibition effect, complex synthesis process, poor water solubility, etc., and achieve the effect of low cost, simple preparation method and high solubility
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[0030] The invention provides a preparation method of a corrosion inhibiting component, comprising: (1) first reacting an amine with an alkylating agent to generate an organic ammonium salt; (2) reacting the organic ammonium salt and thiocyanate in polar React in a solvent to form a precipitate, and remove the insoluble matter and polar solvent in the reaction system to obtain the corrosion-inhibiting component.
[0031] According to the present invention, the amines are primary amines, secondary amines, tertiary amines, dihydropyrrole, tetrahydropyrrole, piperidine, morpholine, piperazine, cyclohexyl imine, pyrrole, pyridine, 2,2-bipyridine , 4,4-bipyridine, quinoline, isoquinoline, indole, isoindole, carbazole, acridine or phenazine.
[0032] According to the present invention, the total number of carbon atoms in the organic ammonium salt is 8-30.
[0033] According to the present invention, when the amine is a primary amine, a secondary amine or a tertiary amine, in the or...
Embodiment 1
[0054] 1.85g dodecylamine (0.01mol), 2.76g anhydrous K 2 CO 3 (0.02mol), 15mL CH 3 CN was added to a 50mL three-necked bottle, and then 14.2g CH 3 I (0.10mol), stirred at room temperature for 2h, filtered to remove insoluble matter, and concentrated to obtain the intermediate quaternary ammonium salt. The intermediate, 15mL ethanol / water (v / v=6:1) was added to another 50mL three-necked flask, and 0.76g ammonium thiocyanate (0.01mol) was dissolved in 5mL ethanol / water (v / v=6: 1) and add it into a three-neck flask, and react at 40°C for 2h. After the reaction was completed, it was cooled to room temperature, and the layers were separated. The upper layer was a light yellow clear solution, and the lower layer was a white precipitate. After filtration, the collected light yellow clear solution was spin-dried under reduced pressure to obtain a yellow viscous solid with a dry weight of 2.68 g.
Embodiment 2
[0056] 0.85g piperidine (0.01mol), 1.38g anhydrous K 2 CO 3 (0.01mol), 15mL CH 3 CN was added to a 50mL three-necked flask, and then 4.83g of 1-bromooctane (0.025mol) was added, and the reaction was stirred at 100°C for 6h, the insoluble matter was removed by filtration, and the intermediate organic ammonium salt was obtained by concentration. The intermediate, 15mL ethanol / water (v / v=6:1) was added to another 50mL three-necked flask, and 0.81g sodium thiocyanate (0.01mol) was dissolved in 5mL ethanol / water (v / v=6: 1) and add it into a three-neck flask to produce a white precipitate, and react at 60°C for 1 hour. After the reaction was completed, it was cooled to room temperature, and the layers were separated. The upper layer was a light yellow clear solution, and the lower layer was a white precipitate. After filtration, the collected light yellow clear solution was spin-dried under reduced pressure to obtain a yellow viscous solid with a dry weight of 3.41 g.
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