Compound imidazoline corrosion inhibitor, and preparation method thereof
A technology for compounding imidazoline and imidazoline, applied in the direction of organic chemistry, etc., to achieve the effects of good water solubility, inhibition of metal corrosion, and good corrosion inhibition performance
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[0028] Example 1
[0029] step one
[0030] Add triethylenetetramine and octadecenoic acid into a high temperature reactor equipped with a stirrer, a condenser, a water separator and a thermometer according to the molar ratio of 1.2:1, add 60g of xylene with water agent, and pass N2 Exclude the air in the system, start stirring and gradually increase the temperature, control the temperature to react at 135°C for 2 hours, then continue to increase the temperature to 235°C for 3 hours, until the xylene and excess materials are evaporated, and imidazoline compound I is obtained.
[0031] Step two
[0032] Add the imidazoline compound compound I and 1,4-bis(chloromethyl)benzene obtained in step one into a high-temperature reactor equipped with a stirrer, condenser, water separator and thermometer at a molar ratio of 2.1:1. Add appropriate amount of sodium methoxide as a catalyst, pass N2 to remove the air in the system, start stirring and gradually increase the temperature, control the t...
Example Embodiment
[0036] Example 2
[0037] step one
[0038] Add diethylenetriamine and lauric acid into a high temperature reaction kettle equipped with a stirrer, condenser, water separator and thermometer according to a molar ratio of 1.15:1, add 60g of xylene with water agent, pass N 2 Exclude the air in the system, start stirring and gradually raise the temperature, control the temperature to react at 130-135°C for 2 hours, then continue to heat up to 235°C for 2-3 hours, until the xylene and excess materials are evaporated to obtain imidazoline Compound I.
[0039] Step two
[0040] Add the imidazoline compound I and 1,4-bis(chloromethyl)benzene obtained in step one into a high-temperature reactor equipped with a stirrer, a condenser, a water separator and a thermometer in a molar ratio of 2.1:1. Add proper amount of sodium methoxide as catalyst, pass N 2 Exclude the air in the system, start stirring and gradually increase the temperature, and control the temperature to react at 135-140°C for 2...
Example Embodiment
[0045] Example 3
[0046] step one
[0047] Add tetraethylenepentamine and octadecenoic acid into a high temperature reaction kettle equipped with a stirrer, condenser, water separator and thermometer according to the molar ratio of 1.15:1, add 60g of xylene with water agent, and pass N 2 Exclude the air in the system, start stirring and gradually raise the temperature, control the temperature to react at 130-135℃ for 2 hours, then continue to heat up to 235℃ and keep for 2-3 hours, until the xylene and excess materials are evaporated to obtain imidazoline Compound I.
[0048] Step two
[0049] Add the imidazoline compound compound I and 1,4-bis(chloromethyl)benzene obtained in step one into a high-temperature reactor equipped with a stirrer, condenser, water separator and thermometer at a molar ratio of 2.1:1. Add proper amount of sodium methoxide as catalyst, pass N 2 Exclude the air in the system, start stirring and gradually increase the temperature, and control the temperature t...
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