Gemini surfactant, preparation method and application thereof, oil displacement agent and oil deposit oil displacement method as well as oil pollution cleaning agent and oil pollution cleaning method

A Gemini surface and active agent technology, which is applied in the field of oil stain cleaning agent and oil stain cleaning, can solve the problems of complex synthesis process, low industrial application value, and low product yield, and achieve simple preparation process, suitable for large-scale application, Improve the effect of oil-water interface

Active Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although researchers also try to use gemini surfactants for EOR, the synthesis process of gemini surfactants that can be used for EOR is usually relatively complicated, the product yield is low, and the industrial application value is not high

Method used

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  • Gemini surfactant, preparation method and application thereof, oil displacement agent and oil deposit oil displacement method as well as oil pollution cleaning agent and oil pollution cleaning method
  • Gemini surfactant, preparation method and application thereof, oil displacement agent and oil deposit oil displacement method as well as oil pollution cleaning agent and oil pollution cleaning method
  • Gemini surfactant, preparation method and application thereof, oil displacement agent and oil deposit oil displacement method as well as oil pollution cleaning agent and oil pollution cleaning method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0062] The invention provides a kind of preparation method of gemini surfactant, this method comprises the following steps:

[0063] (1) under phenolic reaction conditions, the dinonylphenol with the structure shown in formula IV is contacted with formaldehyde, obtains the mixture containing phenolic condensate, and described phenolic condensate has the structure shown in formula V,

[0064]

[0065] (2) In the presence of at least one alkali, the phenolic condensate is contacted with ethylene oxide, and the molar ratio of the phenolic hydroxyl group in the phenolic condensate to the phenolic condensate is more than 1;

[0066] (3) The mixture obtained by contacting step (2) is processed in one or a combination of the following ways:

[0067] Mode 1, under neutralization reaction conditions, the mixture obtained by contacting step (2) is contacted with an acid;

[0068] Method 2. Under the substitution reaction conditions, contact the mixture obtained in step (2) with at l...

Embodiment 1

[0142] (1) Distill 1 kg of the mixture containing nonylphenol and dinonylphenol (from nonylphenol production equipment) under reduced pressure at a vacuum of 0.3kPa, and collect the fraction at 120-140°C (for nonylphenol After phenol), obtain 620g residual material, after testing, determine that this residual material is the dinonylphenol shown in formula IV, wherein, the boiling point of this residual material is about 455 ℃ under 1 standard atmospheric pressure (using atmospheric distillation method method Determination); figure 1 Be the proton nuclear magnetic resonance spectrogram of this remaining material, and the peak that chemical shift is 0.5-2.0ppm corresponds to C 9 h 19 The hydrogen in the chemical shift of 6.7-7.2ppm corresponds to the hydrogen on the benzene ring.

[0143]

[0144] (2) Put 231g of dinonylphenol represented by formula IV prepared in step (1), 10g of paraformaldehyde and 3g of sodium hydroxide in a reaction kettle, then add 300mL of xylene and...

Embodiment 2

[0149] (1) 231g of dinonylphenol shown in formula IV, 27g of formaldehyde solution (concentration is 37% by weight) and 3g of potassium hydroxide prepared by the same method as in Example 1 step (1) are placed in the reactor, Then add 500mL xylene and mix well. The temperature of the reaction kettle was raised to 90° C., and the reaction was kept at this temperature for 2 hours. The obtained mixture is distilled until no water comes out, wherein the conditions of distillation are: azeotropic distillation under normal pressure, and the azeotropic point is in the range of 92-105°C. After testing, it was confirmed that the phenolic condensate represented by formula V had been synthesized.

[0150] (2) After adding 2g of potassium hydroxide to the reactor, replace the atmosphere in the reactor with nitrogen, then raise the temperature of the reactor to 90°C, slowly feed 907g of ethylene oxide, and then react The temperature of the kettle was raised to 140° C., and the reaction w...

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Abstract

The invention discloses a gemini surfactant as well as a preparation method and application thereof, wherein the gemini surfactant has a structure shown in a formula I. The invention also discloses an oil displacement agent containing the gemini surfactant and an oil cleaning agent which contain the gemini surfactant. The invention further discloses an oil deposit oil displacement method and an oil pollution cleaning method which adopt the gemini surfactant. The gemini surfactant according to the invention has good effect of improving an oil-water interface, also can obviously reduce tension of the oil-water interface even at extremely low usage amount, is applicable to being taken as an oil displacement agent used for tertiary oil recovery and is also applicable to being taken as an oil pollution cleaning agent. The gemini surfactant according to the invention is simple in preparation technology and is especially applicable to large-scale application. (The formula I is described in the specification.).

Description

technical field [0001] The present invention relates to a gemini surfactant and its preparation method and application. The present invention also relates to an oil displacement agent containing the gemini surfactant and a method for flooding an oil reservoir using the oil displacement agent. The present invention further relates to a An oil stain cleaning agent containing the gemini surfactant and an oil stain cleaning method using the oil stain cleaning agent. Background technique [0002] In the process of oil exploitation, in order to enhance the recovery rate of oil fields, tertiary oil recovery technology has been widely used. Chemical flooding is the main method of tertiary oil recovery, and surfactant flooding occupies a very important position in chemical flooding. Therefore, the research and development of surfactants for tertiary oil recovery has also attracted widespread attention of scientific researchers. [0003] Gemini surfactant is a new type of surfactant....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/205C07C41/03C07C69/708C07C67/31C07C305/10C07C303/24C07C309/10C07C303/32C09K8/584C11D1/72C11D1/29C08G65/28
CPCC07C43/2055C07C69/708C07C305/10C07C309/10C08G65/2612C09K8/584C11D1/29C11D1/72C11D1/721
Inventor 侯研博余伟发高敏李财富
Owner CHINA PETROLEUM & CHEM CORP
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