Multifunctional phosphorus-free corrosion and scale inhibitor based on humic acid derivative and preparation method thereof
A technology of phosphorus-free corrosion inhibition and polymethacrylate humate, which is applied to chemical instruments and methods, descaling and water softening, and special treatment targets, can solve the problem of incomplete information on chemicals and achieve good corrosion and resistance The effect of the dirt effect
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Embodiment 1
[0030] Add 15 grams of humic acid, 25 grams of methacrylic acid, 1 gram of p-toluenesulfonic acid, and 0.5 grams of azobisisobutyronitrile into 59 grams of xylene, stir and mix, and control the polymerization reaction of methacrylic acid at 65 ° C. 130 Partial esterification reaction occurs at ℃, and the reaction ends when about 3.5 grams of water are separated out. Then, evaporate the solvent in the reaction system under reduced pressure at -0.2MPa at 85°C to obtain polyacrylic acid humate.
[0031] Mix 40 grams of polymethacrylate humate, 2 grams of thiourea, 10 grams of potassium iodide, 20 grams of methanol, 38 grams of water, etc., and stir to obtain the target product of this patent.
Embodiment 2
[0033] Add 25 grams of humic acid, 20 grams of methacrylic acid, 2 grams of p-toluenesulfonic acid, and 1 gram of azobisisobutyronitrile into 50 grams of xylene, stir and mix, and control the polymerization reaction of methacrylic acid at 75 ° C. Partial esterification of humic acid occurs at 140°C, and the reaction ends when about 3 grams of water are separated out. Then, evaporate the solvent in the reaction system under reduced pressure at -0.2MPa at 85°C to obtain polymethacrylate humate.
[0034] Mix 45 grams of polymethacrylate humate, 5 grams of thiourea, 8 grams of potassium iodide, 25 grams of methanol, 17 grams of water, etc., and stir to obtain the target product of this patent.
Embodiment 3
[0036] The scale inhibition rate and corrosion inhibition rate of Example 1 and Example 2 were measured, and the results are shown in Table 1.
[0037] Among them, the measurement method of scale inhibition rate is in accordance with the implementation standard "Q / SY 126-2014"; the measurement method of corrosion inhibition rate is in accordance with the implementation standard "Q / SY 126-2014".
[0038] Table 1
[0039] serial number name Scale inhibition rate% Corrosion inhibition rate% 1 Example 1 product 95 90 2 Example 2 product 94 88
[0040] It can be seen from the data in Table 1 that the scale inhibition rate and corrosion inhibition rate of the corrosion and scale inhibitor obtained in the present invention are higher than the standard requirements, and have better scale and corrosion inhibition effects, and its components do not contain phosphine compounds, which meet the requirements of green environmental protection. development ...
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