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Combined surfactant and its preparation method

A technology of surfactant and active agent, applied in the field of combined surfactant and its preparation, can solve the problems of poor temperature resistance, low interfacial activity, unable to reach the interfacial tension value, etc., achieve excellent temperature resistance, increase hydrophilicity, etc. the effect of reducing the critical micelle concentration

Active Publication Date: 2014-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] One of the technical problems to be solved by the present invention is that the surfactant as the main component of the oil displacement agent system in the prior art has poor temperature resistance and low interfacial activity, especially when the concentration is low, it cannot reach 10 -3 Problems with ultra-low interfacial tension values ​​in mN / m, providing a new combination of surfactants

Method used

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  • Combined surfactant and its preparation method
  • Combined surfactant and its preparation method
  • Combined surfactant and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0053] 1) Synthesis of nonylphenol polyoxypropylene polyoxyethylene ether betaine [a=8, b=2, R 2 =CH 3 , R 3 =CH 3 , R 4 =CH 2 CH(OH)CH 2 ,X - = SO 3 - ]

[0054] i. Add 463.2 g (0.6 mol) of nonylphenol polyoxypropylene polyoxyethylene ether (a=8, b=2) and thionyl chloride into a dry four-necked reaction flask equipped with stirring, condensation and tail gas absorption devices 107.1 grams (0.9 mole), heated to reflux, kept reflux reaction for 6 hours, after the reaction was completed, the distillation device was changed to distill off excess thionyl chloride to obtain chlorinated nonylphenol polyoxypropylene polyoxyethylene ether (a=8 , b=2) 467.2g, yield 98.5%.

[0055]ii. Add 237.2 g (0.3 mol) of chlorinated nonylphenol polyoxypropylene polyoxyethylene ether (a=8, b=2) synthesized in i into a four-necked flask equipped with a reflux condensing device, a thermometer and a stirrer , and add 61.4g (0.45 moles) of 33wt% dimethylamine aqueous solution, 30g of water an...

Embodiment 2

[0061] 1) Synthesis of dodecylphenol polyoxypropylene polyoxyethylene ether betaine [a=6,b=2,R 2= CH 2 CH 2 OH,R 3 =CH 2 CH 2 OH,R 4 =CH 2 CH 2 ,X - = SO 3 - ]

[0062] i. Add 418.8 grams (0.6 moles) of dodecylphenol polyoxypropylene polyoxyethylene ether (a=6, b=2) into a dry four-necked reaction flask equipped with stirring, condensation and tail gas absorption devices, chlorinated 121.4 grams (1.02 moles) of sulfoxide, heated to reflux, kept reflux reaction for 7 hours, after the reaction was finished, treated with [Example 1] to obtain chlorinated dodecylphenol polyoxypropylene polyoxyethylene ether (a=6 , b=2) 418.7g, yield 97.4%.

[0063] ii. Add 215.0 g (0.3 mol) of chlorinated dodecylphenol polyoxypropylene polyoxyethylene ether (a=6, b=2) synthesized in i into a four-port port equipped with a reflux condensing device, a thermometer and a stirrer Add 34.7g (0.33 moles) of diethanolamine, 20g of water and 60g of ethanol to the flask, mix them, heat to 75°C...

Embodiment 3

[0068] 1) Synthesis of tetradecyl polyoxypropylene polyoxyethylene ether betaine [a=4, b=8, R 2= CH 3 , R 3 = CH 3 , R 4 =CH 2 CH 2 ,X - = SO 3 - ]

[0069] i. Add tetradecyl polyoxypropylene polyoxyethylene ether (a=4, b=8) 478.8 g (0.6 moles), chlorinated chlorinated ethylene oxide into a dry four-necked reaction flask equipped with stirring, condensation and tail gas absorption devices. 85.7 grams of sulfone (0.72 mole), heated to reflux, kept reflux reaction for 8 hours, after the reaction was finished, it was treated with [Example 1] to obtain chlorinated tetradecyl polyoxypropylene polyoxyethylene ether (a=4, b =8) 478.6g, yield 97.7%.

[0070] ii. Add 245.0 g (0.3 mol) of chlorinated tetradecyl polyoxypropylene polyoxyethylene ether (a=4, b=8) synthesized in i into a four-necked flask equipped with a reflux condensing device, a thermometer and a stirrer Add 73.6g (0.54 moles) of 33wt% dimethylamine aqueous solution, 30g water and 90g n-propanol to mix, heat ...

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Abstract

The invention relates to a combined surfactant and its preparation method, and mainly solves the problems of bad temperature resistance, low interface activity, and failing at reaching 10<-3>mN / m ultralow interface tension force especially at low concentration existing in surfactants used as the main composition of oil displacement agent systems in the prior art. The combined surfactant comprises, by mass, 1 part of a zwitterionic surfactant, 0.01-50 parts of an anionic-nonionic surfactant and 0.1-90 parts of water. The combined surfactant can well solve the problems, and can be used in the tertiary oil recovery production of oilfields. The molecular formula of each of the above surfactants is shown in the specification.

Description

technical field [0001] The invention relates to a combined surfactant and a preparation method thereof. Background technique [0002] With the increase of the world's energy demand, the rational development and utilization of oil has attracted great attention. In today's increasingly tense energy sources, enhanced oil recovery has become a major topic in oil exploration research. After water flooding, about 2 / 3 The oil stays in the capillary pores with thinner or narrower throat diameter, and is in a highly dispersed state. Because the interfacial tension between oil and water is about 30mN / m, it is very difficult to displace this part of oil only by increasing the pressure difference. Because the pressure difference required for driving is 9806.7Kpa, the pressure difference during water injection is only 196.1-392.3Kpa, which is much smaller than the driving pressure difference. [0003] Chemical flooding is the main method of tertiary oil recovery, and surfactant flooding...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 沈之芹张慧陈安猛李斌
Owner CHINA PETROLEUM & CHEM CORP
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