Low-toxicity mannich base compound, prepared acidizing corrosion inhibitor and preparation method thereof
A technology of acidifying corrosion inhibitor and Mannich base, which is applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve problems such as unstable performance, corrosion inhibitor product pollution, and high cost, and achieve mitigation Excellent corrosion performance, inhibition of cathode and anode processes, and stable properties
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[0029] Example 1
[0030] Mix 22.6g of morpholine, 52.8g of cinnamaldehyde and 9.3g of isopropanol into a three-necked flask, then slowly add 25.5g of cyclohexanone, stir evenly, adjust pH=4~5 with hydrochloric acid, at 85~100℃ After 7 hours of reaction, the Mannich base compound can be obtained after the system is cooled. The molecular formula of Mannich base compound is:
Example Embodiment
[0031] Example 2
[0032] Mix 22.6g of morpholine, 37.6g of furfural and 8.6g of isopropanol into a three-necked flask, then slowly add 25.5g of cyclohexanone, stir evenly, adjust pH=4~5 with hydrochloric acid, and react at 90~95℃ After 6h, the Mannich base compound can be obtained after the system is cooled. The molecular formula of Mannich base compound is:
Example Embodiment
[0033] Example 3
[0034] Take the Mannich base compound in Example 1 as the main corrosion inhibitor 1 and N,N-dimethylformamide, water, Ping-O (alkyl alcohol polyoxyethylene ether) and propynol according to Table 1. Mixing in the proportions to obtain acidification corrosion inhibitor MNX-I.
[0035] Table 1 The ratio of MNX-I acidification corrosion inhibitor
[0036]
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