Tertiary oil recovery surfactant and preparation method thereof
A surfactant and alkaline technology, which is applied in the field of tertiary oil recovery surfactant and its preparation, can solve the problems of low oil displacement efficiency and high oil displacement efficiency, and achieve improved salt resistance, enhanced oil recovery, wide application prospects and practical effect
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Embodiment 1
[0024] 1. Surfactant Preparation
[0025] a) Add 0.5 mol of nonylphenol, 1.5 g of sodium hydroxide and 15 g of water into a reactor equipped with a condensing device, a stirring device, and a gas disperser, and heat to 85° C. while nitrogen is blown, and then stir for 1 hour. Turn on the vacuum system, vacuumize and dehydrate for 1 hour at a temperature of 90°C, then purge 4 times with nitrogen to remove the air in the system, then adjust the reaction temperature of the system to 150°C and slowly introduce 1mol propylene oxide to control the pressure ≤0.40MPa to react; after the reaction, purge the system with nitrogen, neutralize with glacial acetic acid after cooling, and obtain 0.49mol nonylphenol polyoxypropylene (2) ether.
[0026] b) Add the nonylphenol polyoxypropylene ether (2) obtained in step a) into a reactor equipped with a stirring device, a condensation reflux device and a water separation device, add 250 ml of benzene and 40 g of sodium hydroxide, and heat at 60...
Embodiment 2
[0036] 1. Surfactant Preparation
[0037] a) Add 0.5 mol of nonylphenol, 1.5 g of sodium hydroxide and 15 g of water into a reactor equipped with a condensing device, a stirring device, and a gas disperser, and heat to 85° C. while nitrogen is blown, and then stir for 1 hour. Turn on the vacuum system, vacuumize and dehydrate for 1 hour at a temperature of 90°C, and then blow with nitrogen gas 4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C and slowly introduce 0.5mol propylene oxide to control React at a pressure of ≤0.40 MPa; after the reaction, purge the system with nitrogen, neutralize it with glacial acetic acid after cooling, and obtain 130 g of nonylphenol polyoxypropylene (1) ether.
[0038] b) Add 0.5mol nonylphenol polyoxypropylene ether (1) obtained in step a) into a reactor equipped with a stirring device, a condensation reflux device and a water separation device, add 250 milliliters of benzene and 40 grams of s...
Embodiment 3
[0043] 1. Surfactant Preparation
[0044] a) Add 0.5 mol of nonylphenol, 1.5 g of sodium hydroxide and 15 g of water into a reactor equipped with a condensing device, a stirring device, and a gas disperser, and heat to 85° C. while nitrogen is blown, and then stir for 1 hour. Turn on the vacuum system, vacuumize and dehydrate for 1 hour at a temperature of 90°C, then purge 4 times with nitrogen to remove the air in the system, then adjust the reaction temperature of the system to 150°C and slowly introduce 2.0mol propylene oxide to control The reaction was carried out at a pressure of ≤0.40 MPa; after the reaction, the system was purged with nitrogen, and after cooling, it was neutralized with glacial acetic acid to obtain 0.49 mol of nonylphenol polyoxypropylene (4) ether.
[0045] b) Add 0.49mol nonylphenol polyoxypropylene ether (4) obtained in step a) into a reactor equipped with a stirring device, a condensation reflux device and a water separation device, add 250 millili...
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Abstract
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