A kind of Mannich base type acidification corrosion inhibitor and preparation method thereof
A technology of acidifying corrosion inhibitor and Mannich base, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., and can solve the problems of high cost, unstable corrosion inhibitor performance, and few varieties , to achieve the effect of low cost, stable and significant corrosion inhibition performance, and improved reaction energy barrier
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Embodiment 1
[0029] Mix 8.4g of 2-mercaptobenzothiazole, 5.3g of benzaldehyde and 24.4g of ethanol and put it into a three-necked flask, then slowly add 3.7g of aniline, stir well, adjust the pH to 2~3 with hydrochloric acid, at 80~85℃ The reaction was carried out for 7 hours, and the Mannich base compound could be obtained after the system was cooled. Wherein the molecular formula of the Mannich base compound is:
[0030]
Embodiment 2
[0032] Mix 8.4g of 2-mercaptobenzothiazole, 6.7g of furfural and 29.7g of ethanol and put it into a three-necked flask, then slowly add 4.7g of aniline, stir well, adjust the pH to 3~4 with hydrochloric acid, at 80~90℃ After reacting for 9 hours, the Mannich base compound can be obtained after the system is cooled. Wherein the molecular formula of the Mannich base compound is:
[0033]
Embodiment 3
[0035] Mix 8.4g of 2-mercaptobenzothiazole, 10.6g of cinnamaldehyde and 24.6g of ethanol and put it into a three-necked flask, then slowly add 5.6g of aniline, stir evenly, adjust the pH to 2~3 with hydrochloric acid, and set the temperature at 75~85℃ The reaction was carried out for 10 hours, and the Mannich base compound could be obtained after the system was cooled. Wherein the molecular formula of the Mannich base compound is:
[0036]
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