Double anionic surfactant oil displacement agent and its preparation method and application
A technology of surfactant flooding and surfactant, which is applied in the field of chemical agents in oil exploration and oil fields, to achieve the effects of strong ability, stable adsorption and outstanding wettability
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Embodiment 1
[0027] at 2m 3 Add 400kg of water and 350kg of isopropanol into the stainless steel reaction kettle, stir and heat, add 300kg of dodecyl primary amine when the temperature is 80°C, after the dissolution is complete, add 3.5kg of polyethylene glycol (800), and dropwise add 155kg of methyl acrylate , Refluxed for 6h to obtain methyl dodecylamino acrylate. Add 210kg of sodium chloroacetate, react at 85°C for 5h, add dropwise 165kg of 45% sodium hydroxide aqueous solution after the reaction, and hydrolyze at 80°C for 7h to obtain a solution of sodium dodecylamino diacrylate, which is a dianionic surfactant Oil displacement agent, numbered QY-1.
Embodiment 2
[0029] at 2m 3 Add 400kg of water and 350kg of isopropanol into the stainless steel reaction kettle, stir and heat, add 300kg of dodecyl primary amine when the temperature is 80°C, after the dissolution is completed, add 5kg of polyethylene glycol (5000), dropwise add 155kg of methyl acrylate, Reflux for 5h to obtain methyl dodecylamino acrylate. Add 355kg of sodium 3-chloro-2-hydroxypropanesulfonate, react at 85°C for 5h, add dropwise 165kg of 45% sodium hydroxide aqueous solution after the reaction, and hydrolyze at 80°C for 7h to obtain dodecylaminoacrylic acid hydroxypropylsulfonate Sodium acid disodium solution, that is, double anionic surfactant oil displacement agent, the code is QY-2.
Embodiment 3
[0031] at 2m 3 Add 350kg of water and 350kg of isopropanol into the stainless steel reaction kettle, stir and heat, add 300kg of octadecyl primary amine when the temperature is 80°C, after the dissolution is completed, add 3.5kg of polyethylene glycol (2000), and dropwise add 126kg of ethyl acrylate , Refluxed for 6h to obtain ethyl octadecylaminoacrylate. Add 150kg of sodium chloroacetate, react at 85°C for 5h, add dropwise 120kg of 45% sodium hydroxide aqueous solution after the reaction, and hydrolyze at 80°C for 7h to obtain a solution of sodium octadecylaminodiacrylate, which is a dianionic surfactant Oil displacement agent, number QY-3.
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