Method for preparing corrosion inhibitors from prickly ash seed oil
A technology of Zanthoxylum bungeanum seed oil and corrosion inhibitor, which is applied in the field of metal surface corrosion and protection, can solve the problems of high price and narrow application range, and achieve the effects of low cost, improved utilization rate and excellent performance
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Embodiment 1
[0012] Example 1: First, the pepper seed oil and diethylenetriamine are added in a three-necked flask at a molar ratio of 1:3 to obtain a mixture, then 35% xylene of the mixture mass is added thereto, and the temperature is raised to 110° C. under constant stirring for reflux condensation 3 hour, continue to heat up to 160°C for reflux condensation for 3 hours, then heat up to 240°C for reflux condensation for 4 hours and then drop to room temperature to obtain the corrosion inhibitor precursor; the corrosion inhibitor precursor is heated to 100°C and continuously refluxed and stirred, and the slow Slowly add 30% benzyl chloride of the total weight of the corrosion inhibitor precursor to the corrosion inhibitor precursor, and after complete addition, raise the temperature to 220°C for 3 hours of reaction, and cool down to room temperature to obtain the water-soluble Zanthoxylum bungeanum oil corrosion inhibitor.
Embodiment 2
[0013] Example 2: First, the pepper seed oil and triethylenetetramine are added in a three-necked flask in a molar ratio of 1: 3.5 to obtain a mixture, then 20% toluene of the mixture mass is added thereto, and the temperature is raised to 120° C. for reflux condensation for 2 hours under constant stirring , continue to heat up to 170°C for reflux and condense for 2 hours, then raise the temperature to 230°C for 3 hours and then cool down to room temperature to obtain the corrosion inhibitor precursor; raise the temperature of the corrosion inhibitor precursor to 110°C and continue to reflux and stir to make the corrosion inhibitor Slowly add 35% benzyl chloride of the total weight of the agent precursor to the corrosion inhibitor precursor, wait until it is completely added and heat up to 240°C for 4 hours of reaction, and then cool down to room temperature to obtain the water-soluble Zanthoxylum bungeanum oil corrosion inhibitor.
Embodiment 3
[0014] Example 3: First, the pepper seed oil and tetraethylenepentamine are added in a three-necked flask at a molar ratio of 1:4 to obtain a mixture, then 30% of the mass of the mixture is added to the mixed benzene, and the temperature is raised to 130° C. under constant stirring to reflux and condense for 2.5 hour, continue to heat up to 165°C for reflux condensation for 2.5 hours, then raise the temperature to 225°C for 3.2 hours and then drop to room temperature to obtain the corrosion inhibitor precursor; the corrosion inhibitor precursor is heated to 105°C and continuously refluxed and stirred, and the slow Slowly add 28% benzyl chloride of the total weight of the corrosion inhibitor precursor to the corrosion inhibitor precursor, and after complete addition, raise the temperature to 210°C for 2 hours, and cool down to room temperature to obtain the water-soluble Zanthoxylum bungeanum oil corrosion inhibitor.
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