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Fatty alcohol-polyoxyethylene ether benzene sulfonate and preparation method thereof

A technology of alcohol polyoxyethylene ether and benzene sulfonate, which is applied in the direction of sulfonate preparation, chemical instruments and methods, and drilling compositions, etc. It can solve the problems of not meeting the needs of foam flooding and poor thermal stability of foam agents, etc.

Inactive Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that the thermal stability of the foam agent in the existing foam flooding enhanced oil recovery technology is poor, and it cannot meet the needs of foam flooding in high-temperature and high-salinity formations due to the precipitation of divalent ions. Fatty alcohol polyoxyethylene ether benzene sulfonate

Method used

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  • Fatty alcohol-polyoxyethylene ether benzene sulfonate and preparation method thereof
  • Fatty alcohol-polyoxyethylene ether benzene sulfonate and preparation method thereof
  • Fatty alcohol-polyoxyethylene ether benzene sulfonate and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] Synthesis of sodium dodecyl alcohol polyoxyethylene (7) ether benzene sulfonate

[0023] (1) Add 93g (0.5 mole) dodecyl alcohol and the calcium oxide catalyst of alcohol weight 1% in the reactor that condensing device, stirring device and gas disperser are housed, when heating to 135 ℃ while flowing nitrogen, add 8g water , and stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°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 155g oxirane, control pressure<0.60MPa and carry out alkoxylation reaction; After the reaction fi...

Embodiment 2

[0028]Synthesis of sodium stearyl polyoxyethylene (15) ether benzene sulfonate

[0029] (1) Add 135g (0.5 mol) octadecyl alcohol and the calcium oxide catalyst of alcohol weight 1% in the reactor that condensing device, stirring device and gas disperser are housed, when heating to 135 ℃ while flowing nitrogen, add 10 g water, stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°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 330g oxirane, control pressure<0.60MPa and carry out alkoxylation reaction; After the reaction finishes, s...

Embodiment 3

[0033] Synthesis of sodium dodecyl alcohol polyoxyethylene (3) ether benzene sulfonate

[0034] (1) Add 93g (0.5 mole) dodecyl alcohol and the calcium oxide catalyst of alcohol weight 1% in the reactor that condensing device, stirring device and gas disperser are housed, when heating to 135 ℃ while flowing nitrogen, add 8 grams water, stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°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 70g oxirane, control pressure<0.60MPa and carry out alkoxylation reaction; After the reaction fin...

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Abstract

The invention relates to fatty alcohol-polyoxyethylene ether benzene sulfonate and a preparation method thereof. The problems that a foam agent is poor in heat stability, is precipitated when meeting divalent ions and cannot meet the requirement of high-temperature and high-salinity stratum foam flooding in the conventional foam flooding enhanced oil extraction technology are mainly solved. The alcohol-polyoxyethylene ether benzene sulfonate with a molecular general formula (I) is adopted, wherein M is alkali metals, alkaline-earth metals or ammonium groups, R is alkyl groups having 8 to 24 carbon atoms, and n is an integral number from 3 to 20. Through the technical scheme, the problems are better solved. The method can be used for foam flooding enhanced oil extraction.

Description

technical field [0001] The invention relates to a fatty alcohol polyoxyethylene ether benzene sulfonate and a preparation method thereof. Background technique [0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among new technologies for tertiary oil recovery, chemical composite flooding is still one of the most promising methods. The oil displacement mechanism is mainly that the polymer or glue increases the viscosity of the displacement water, reduces the oil-water mobility ratio, alleviates the channeling phenomenon, and improves the sweep efficiency; surfactants and alkalis reduce the oil / water interfacial tension, increase the capillary number, and promote Crude oil is desorbed and effectively dispersed from ...

Claims

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Application Information

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IPC IPC(8): C07C309/42C07C303/32C08G65/28C08G65/326C09K8/594C09K8/584
Inventor 何秀娟张卫东沙鸥张慧
Owner CHINA PETROLEUM & CHEM CORP
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