Cationic water purifying agent and application of same in oilfield chemical flooding produced liquid
A water purifying agent and cation technology, applied in the field of cationic water purifying agent, quaternary ammonium cationic high-efficiency water purifying agent for oilfield chemical flooding produced fluid, can solve the problem of no purification effect, poor water purification effect, poor flocculation effect, etc. problem, to achieve good flocculation effect, improve flocculation efficiency and low cost
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[0027] This embodiment provides a cationic water purifying agent, which is prepared through the following steps:
[0028] Add 5.8g of dodecylamine, 9.5g of emulsifier OP-10 and 47g of epichlorohydrin into the reaction kettle, stir to dissolve, and raise the temperature to 80°C;
[0029] Take by weighing 4.2g hexamethylenetetramine, add about 25mL distilled water and make it dissolve, obtain the hexamethylenetetramine aqueous solution, then add 42g dimethylamine (content is 33wt%), pack into feeder after mixing, When the temperature of the reaction kettle is raised to 80°C, use the feeder to slowly drop the mixed solution into the reaction kettle, use the heat of reaction to raise the temperature of the reaction solution to 90°C, and adjust the dropping speed to maintain 90°C until the addition of the mixed solution in the feeder is completed;
[0030] Then, when the temperature of the reaction liquid is lowered to 70°C, add sulfuric acid to adjust the pH value of the reaction ...
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