Antiscale composition and application thereof
A composition and anti-scaling technology, which can be used in the treatment of equipment corrosion/scaling inhibition, hydrocarbon oil treatment, petroleum industry, etc. It can solve problems such as aggravating equipment corrosion, poor high temperature resistance, and negative impacts of decomposition products during processing, and achieve descaling High efficiency and good high temperature resistance
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Embodiment 1
[0049] Embodiment 1 synthetic polyisobutylene o-cresol
[0050] In a 500ml four-necked flask equipped with a stirrer, a thermometer, a condenser and a dropping funnel, add 34.93g (0.323mol) of o-cresol, 6.88g (0.048mol) of boron trifluoride ether catalyst, and 100ml of n-hexane solvent React with 161.61g (0.162mol) of polyisobutylene (Mn=1000) at 80°C for 2h. After the reaction, the reaction mixture was washed once with 5% potassium hydroxide solution by mass fraction, and washed with hot water to neutrality to remove the catalyst, and then the solvent and unreacted o-cresol were distilled off under reduced pressure. The hydroxyl value of the synthetic product polyisobutylene o-cresol is 53.49 mg / g. For the determination of hydroxyl value, refer to the acetic anhydride method in GB / T7383-2007.
[0051] An example reaction is as follows:
[0052]
Embodiment 2
[0054] The polyisobutylene o-cresol 47.16g (0.045mol) that makes in embodiment 1 is added in the 500ml four-necked beaker that stirrer, thermometer and separator are equipped with under nitrogen protection, then add 2.70g (0.045mol) ethylenediamine, 3.83g (0.047mol) of formaldehyde, and 47ml of toluene was added as a reaction solvent. After reacting at 80°C for 1.5h, the temperature was cooled to room temperature, and 4.97g (0.0225mol) of 4-nonylphenol, 3.83g (0.047mol) formaldehyde, reacted at 70°C for 1h. After the reaction was completed, the solvent and a small amount of water generated were distilled off under reduced pressure to obtain the final Mannich base detergent TN-1. An example reaction is as follows:
[0055]
Embodiment 3
[0057] The polyisobutylene o-cresol 44.92g (0.043mol) that makes in embodiment 1 is added in the 500ml four-necked beaker that stirrer, thermometer and separator are equipped with under nitrogen protection, then add 4.64g (0.043mol) Diethylenetriamine, 3.65g (0.045mol) formaldehyde, and 47ml of xylene was added as a reaction solvent, after reacting at 90°C for 1.5h, the temperature was cooled to room temperature, and 5.64g (0.0215mol) of 4-dodecylphenol was added , 3.65g (0.045mol) formaldehyde, reacted at 70°C for 1h. After the reaction was completed, the solvent and a small amount of water generated were distilled off under reduced pressure to obtain the final Mannich base detergent TN-2. Refer to Example 2 for an exemplary reaction scheme.
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