Surfactant composition and use thereof
A surfactant and composition technology, applied in the field of surfactant composition, can solve problems such as corrosion of equipment and pipelines, damage to formations and oil wells, poor oil displacement efficiency, etc., to achieve reduced usage, easy degradation, and enhanced temperature resistance performance effect
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Embodiment 1
[0037] Synthesis of sodium octadecanoic acid polyoxyethylene (6) ether sulfonate
[0038] (1) Add 142 grams (about 0.5 moles) of octadecanoic acid and 1.5 grams of calcium oxide to a reactor equipped with a condensing device, a stirring device and a gas disperser, and when heating to 135 ° C while passing nitrogen gas, add octadecanoic acid Acid 14% by weight of water, stirred for 1 hour. Then first distill water at normal pressure, then decompress under 20 mm Hg vacuum, vacuumize at 140°C for 20 minutes to evaporate moisture, cool the solution to 80°C, slowly add 20% by weight of the theoretical acid amount of the neutralization catalyst of concentrated sulfuric acid. Heat the system temperature to 85-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Enter 135 grams of ethylene oxide, control pressure≤0.40MPa to carry out al...
Embodiment 2
[0044] (1) Add 228 grams (1.0 moles) of tetradecanoic acid and 2.5 grams of calcium oxide to a reactor equipped with a condensing device, a stirring device and a gas disperser, and when heating to 135 ° C while passing nitrogen, add 25 grams of water and stir React for 1 hour. Then first distill water at normal pressure, then depressurize under 20 mm Hg vacuum, vacuumize at 140° C. for 20 minutes to remove moisture, cool the solution to 80° C., and slowly add 0.8 grams of concentrated sulfuric acid dropwise. Heat the system temperature to 85-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Add 180 grams of ethylene oxide, control the pressure ≤ 0.40MPa to carry out the alkoxylation reaction; after the reaction, purging the system with nitrogen to remove unreacted ethylene oxide, neutralize, decolorize, filter, and dehydrate af...
Embodiment 3
[0050] (1) Add 100 grams (0.5 moles) of dodecanoic acid and 1.0 gram of calcium oxide in the reactor equipped with condensing device, stirring device and gas disperser, when heating to 135 ℃ while flowing nitrogen, add 10 grams of water, The reaction was stirred for 1 hour. Then first distill water at normal pressure, then decompress under 20 mm Hg vacuum, vacuumize at 140°C for 20 minutes to evaporate moisture, cool the solution to 80°C, slowly add 20% by weight of the theoretical acid amount of the neutralization catalyst of concentrated sulfuric acid. Heat the system temperature to 85-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Add 68 grams of ethylene oxide, control the pressure ≤ 0.40MPa to carry out alkoxylation reaction; after the reaction, use nitrogen to sweep the system to remove unreacted ethylene oxide, neutr...
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