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Aliphatic acid polyethenoxy ether sulphonate and preparation thereof

The technology of polyoxyethylene ether sulfonate and polyoxyethylene ether is applied in the field of fatty acid polyoxyethylene ether sulfonate and its preparation, and can solve the problems of corrosion of equipment and pipelines, formation and oil well damage, poor oil displacement efficiency, etc. , to reduce the amount of use, easy to degrade, and enhance the temperature resistance.

Active Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One of the technical problems to be solved by the present invention is that the oil displacement agent containing surfactant in the prior art has poor oil displacement efficiency under high temperature and high salinity conditions, and at the same time, because it contains alkali, it will cause damage to the formation and oil well, and corrode equipment and pipelines , the problem of high production cost, providing a new fatty acid polyoxyethylene ether sulfonate

Method used

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  • Aliphatic acid polyethenoxy ether sulphonate and preparation thereof

Examples

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Effect test

Embodiment 1

[0038] Synthesis of sodium octadecanoic acid polyoxyethylene (6) ether sulfonate

[0039] (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

[0045] (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

[0051] (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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Abstract

The invention relates to fatty acid polyethenoxy ether sulfonate and the preparation method thereof, mainly aiming at solving the problems that current oil displacement agent containing surfactant is poor in oil displacement efficiency under high temperature with the existence of high salt and that the oil displacement agent contains alkali and causes damages to the stratum and the oil field and erodes the equipment and the pipes, which results in high production cost. The invention adopts fatty acid polyethenoxy ether sulfonate with general molecular formula (I)CnH2n+1COO(CH2CH2O)mCH2CH2SO3M to solve the problem; wherein M is alkali metal; n is any integer from 10 to 24; m is any integer from 1 to 10. The fatty acid polyethenoxy ether sulfonate can be applied to the production of tertiary oil recovery in oil fields.

Description

technical field [0001] The invention relates to a fatty acid polyoxyethylene ether sulfonate and a preparation method thereof. Background technique [0002] Judging from the reserves and exploitation of my country's oil resources, my country's Daqing, Shengli, Zhongyuan, Huabei, Dagang and other large oil fields are all in the middle and late stage of exploitation, and the water content of the produced oil is as high as 90%, and they have entered into the use of enhanced oil recovery (EOR) technology In the tertiary oil recovery stage, enhanced oil recovery has become an important strategic measure of my country's oil industry. Among them, chemical flooding is one of the main methods of tertiary oil recovery. [0003] In the chemical flooding technology of tertiary oil recovery, whether it is the current surfactant flooding (micelle flooding, microemulsion flooding), or the most promising composite flooding (alkali + surfactant + polymer), it is inseparable from Open to cho...

Claims

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Application Information

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IPC IPC(8): C07C309/10C07C303/04C09K8/584
Inventor 沙鸥张卫东陈荣福
Owner CHINA PETROLEUM & CHEM CORP
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