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A kind of gemini polyoxyethylene ether succinate surfactant for oil displacement and preparation method thereof

A technology of polyoxyethylene ether succinate and alkylphenol polyoxyethylene sulfosuccinate is applied in the field of Gemini polyoxyethylene ether succinate surfactant for oil displacement and its preparation, which can solve the problem of surfactant It is impossible to simultaneously meet the problems of emulsification and viscosity reduction, low interfacial tension, poor solubility, etc., to ensure the use effect, improve the wetting performance, and achieve the effect of good effect.

Active Publication Date: 2021-08-27
SHANDONG DAMING FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used nonionic surfactants such as alkyl alcohol polyoxyethylene ethers are used as emulsifiers due to poor solubility and low cloud point. Usually, one surfactant cannot meet the increasing requirements of emulsification and viscosity reduction, wetting and oil washing, and low interfacial tension. Harsh technical indicators are generally improved by the use of surfactant compounding

Method used

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  • A kind of gemini polyoxyethylene ether succinate surfactant for oil displacement and preparation method thereof
  • A kind of gemini polyoxyethylene ether succinate surfactant for oil displacement and preparation method thereof
  • A kind of gemini polyoxyethylene ether succinate surfactant for oil displacement and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] A Gemini polyoxyethylene ether succinate surfactant for oil displacement, said surfactant is Gemini pentadecylphenol polyoxyethylene ether 9 sulfosuccinate;

[0027] Step 1. Synthesis of Gemini Pentadecylphenol Polyoxyethylene Ether 9: Feed Pentadecylphenol Polyoxyethylene Ether 9 on the basis of 0.5mol, add 0.25mol of paraformaldehyde into a 500ml three-necked bottle and mix, pump Vacuum to -0.07MPa, then fill with nitrogen to a pressure of 0.1MPa, and react at a set temperature of 120°C for 2h to obtain Gemini pentadecylphenol polyoxyethylene ether 9.

[0028] Step 2, Synthesis of Gemini pentadecylphenol polyoxyethylene ether 9 carboxylate: 0.2mol Gemini pentadecylphenol polyoxyethylene ether 9 and 0.42mol maleic anhydride are added to a three-necked flask, namely Gemini pentadecylphenol polyoxyethylene ether 9 and 0.42mol maleic anhydride Alkylphenol polyoxyethylene ether 9 and maleic anhydride are fed at a mass ratio of 1:2.1, the set temperature is 100°C, and stirr...

Embodiment 2

[0033] A kind of Gemini polyoxyethylene ether succinate surfactant for oil displacement, described surfactant is Gemini nonylphenol polyoxyethylene ether 4 sulfosuccinate;

[0034] Step 1. Synthesis of Gemini nonylphenol polyoxyethylene ether 4: Feed nonylphenol polyoxyethylene ether 4 on the basis of 0.5mol, add 0.25mol of paraformaldehyde into a 500ml three-necked bottle and mix, vacuumize to -0.07 After MPa, nitrogen gas was filled to a pressure of 0.1 MPa, and the reaction was carried out at a set temperature of 120°C for 2 hours to obtain Gemini nonylphenol polyoxyethylene ether 4.

[0035] Step 2. Synthesis of Gemini nonylphenol polyoxyethylene ether 4 carboxylate: Add 0.2mol Gemini nonylphenol polyoxyethylene ether 4 and 0.42mol maleic anhydride to a three-necked flask, namely Gemini nonylphenol polyoxyethylene Ether 4 and maleic anhydride were fed at a mass ratio of 1:2.1, set the temperature at 100°C, and stirred for 4 hours. Stop the reaction, take a sample and meas...

Embodiment 3

[0040] A Gemini polyoxyethylene ether succinate surfactant for oil displacement, said surfactant is Gemini isomerism decaphenol polyoxyethylene ether 10 sulfosuccinate;

[0041] Step 1. Synthesis of Gemini isomeric decanol phenol polyoxyethylene ether 10: Feed isomeric decanol phenol polyoxyethylene ether 10 on the basis of 0.5 mol, add 0.25 mol of paraformaldehyde into a 500ml three-necked bottle and mix, pump Vacuum to -0.07MPa, then fill with nitrogen to a pressure of 0.1MPa, and react at a set temperature of 120°C for 2h to obtain Gemini isomeric decanol phenol polyoxyethylene ether 10.

[0042] Step 2. Synthesis of Gemini isomeric decanol phenol polyoxyethylene ether 10 carboxylate: Add 0.2mol Gemini isomeric decanol phenol polyoxyethylene ether 10 and 0.42mol maleic anhydride to a three-necked flask, namely Gemini isomerization Decanol phenol polyoxyethylene ether 10 and maleic anhydride were fed at a mass ratio of 1:2.1, set the temperature at 100°C, and stirred for 4 h...

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Abstract

The invention relates to a Gemini polyoxyethylene ether succinate surfactant for oil displacement and a preparation method thereof, which is characterized in that the surfactant is Gemini alkylphenol polyoxyethylene sulfosuccinate. This application synthesizes Gemini alkylphenol polyoxyethylene ether sulfosuccinate to obtain salt-resistant and temperature-resistant Gemini alkylphenol polyoxyethylene ether sulfosuccinate with high wettability, which is especially suitable for High-temperature and high-salt oil reservoirs. The temperature-resistant and salt-resistant ultra-low interfacial tension surfactant of the Gemini alkylphenol polyoxyethylene ether sulfosuccinate type provided by the application has good prospects for popularization and application and good social and economic benefits.

Description

technical field [0001] The invention relates to a Gemini polyoxyethylene ether succinate surfactant for oil displacement and a preparation method thereof. Background technique [0002] Chemical flooding in tertiary oil recovery technology uses chemical substances to improve the performance of oil, gas, water and rocks. Generally, the recovery rate can be increased by about 20% on the basis of water flooding. At present, chemical flooding in various oilfields in my country is mainly binary or ASP flooding technology, especially surfactant flooding based on the mechanism of ultra-low interfacial tension. obvious advantage. However, surfactants suitable for composite flooding, such as petroleum sulfonate, heavy alkylbenzene sulfonate, natural carboxylate and petroleum carboxylate, will cause salting-out and hydrolysis problems, resulting in unsatisfactory temperature and salt resistance and interfacial activity. Requirements, while the temperature and salt resistance of alkoxy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C07C303/20C07C309/17C07C67/08C07C69/60C07C41/30C07C43/23
CPCC09K8/584C07C309/17C07C303/20C07C67/08C07C41/30C07C69/60C07C43/23
Inventor 李国利邓理刘平王志强刘超于孟露刘玉君
Owner SHANDONG DAMING FINE CHEM CO LTD
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