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Fluorocarbon gemini surfactant as well as preparation method and application thereof

A Gemini surfactant and active agent technology, which is applied in the field of fluorocarbon Gemini surfactant and its preparation, can solve the problems of high concentration of surfactants, poor compatibility of polymers, poor temperature and salt resistance of surfactants, etc., and achieve Ease of handling, small change in performance, effect of reducing surface tension

Active Publication Date: 2009-08-12
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the following problems occur in the application of surfactants: (1) The concentration of surfactants is too high; (2) The compatibility with polymers is poor, and the viscosity of polymer solutions loses a lot after adding surfactants (3) The temperature and salt resistance of the surfactant is poor
At present, the existing surfactants are difficult to overcome the above problems. Therefore, it is urgent to develop a new type of surfactant suitable for polymer-surfactant binary compound flooding and alkali-polymer-surfactant triple compound flooding.

Method used

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  • Fluorocarbon gemini surfactant as well as preparation method and application thereof
  • Fluorocarbon gemini surfactant as well as preparation method and application thereof
  • Fluorocarbon gemini surfactant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, preparation fluorocarbon gemini surfactant

[0034] 1) Dissolve 100.4g (0.2mol) perfluorooctanesulfonyl fluoride in ethyl acetate, mix with 5.92g (0.08mol) 1,3-propanediamine, heat to 70°C, then add 1.12g ( 0.02mol) Potassium hydroxide was reacted under stirring conditions for 8 hours; after drying, the dried product was mixed with an aqueous solution of sodium hydroxide with a concentration of 1.0% by mass, the organic matter was extracted, and the brown solid obtained after removing water was bis-perfluorooctyl Sulfonamide.

[0035] 2) Mix 103.8g (0.1mol) bis-perfluorooctane sulfonamide and 16.1g (0.2mol) 2-chloroethanol in ethanol solution, then add 0.56g (0.01mol) potassium hydroxide, and stir at 80°C Carrying out the reaction for 8 hours to obtain N-N-ethanol bis perfluorooctane sulfonamide;

[0036] 3) Mix 112.6g (0.1mol) of N-N-ethanol bisperfluorooctane sulfonamide with 6.8g (0.2mol) of hydrogen peroxide, then add 0.56g (0.01mol) of potassium hyd...

Embodiment 2

[0041] Embodiment 2, preparation fluorocarbon gemini surfactant

[0042] 1) Dissolve 125.5g (0.25mol) perfluorooctanesulfonyl fluoride in ethyl acetate, mix with 0.08mol ethylenediamine, heat to 80°C, then add 1.40g (0.025mol) potassium hydroxide and stir The reaction was carried out under the conditions for 8 hours; after drying, the dried product was mixed with an aqueous sodium hydroxide solution with a concentration of 1.0% by mass to extract organic matter, and after removing water, a tan solid was obtained as bis-perfluorooctane sulfonamide.

[0043] 2) Mix 103.8g (0.1mol) bis-perfluorooctane sulfonamide and 20.125g (0.25mol) 2-chloroethanol in ethanol solution, then add 1.40g (0.025mol) potassium hydroxide, and stir at 70°C The reaction was carried out for 6 hours to obtain N-N-ethanol bis-perfluorooctanesulfonamide;

[0044] 3) Mix 112.6g (0.1mol) of N-N-ethanol bisperfluorooctane sulfonamide with 8.5g (0.25mol) of hydrogen peroxide, then add 1.40g (0.025mol) of potassi...

Embodiment 3

[0046] Embodiment 3, preparation fluorocarbon gemini surfactant

[0047] 1) Dissolve 100.4g (0.2mol) of perfluorooctanesulfonyl fluoride in ethyl acetate, mix with 0.1mol of 1,4-butylene diamine, heat to 70°C, then add 0.56g (0.01mol) of hydroxide Potassium was reacted under stirring conditions for 6 hours; after drying, the dried product was mixed with an aqueous solution of sodium hydroxide with a concentration of 0.8% by mass to extract organic matter, and after removing water, a tan solid was obtained as bis-perfluorooctane sulfonamide.

[0048] 2) Mix 103.8g (0.1mol) bis-perfluorooctane sulfonamide and 16.1g (0.20mol) 2-chloroethanol in ethanol solution, then add 0.56g (0.01mol) potassium hydroxide, and stir at 80°C Carrying out the reaction for 8 hours to obtain N-N-ethanol bis perfluorooctane sulfonamide;

[0049] 3) Mix 112.6g (0.1mol) of N-N-ethanol bisperfluorooctane sulfonamide with 8.5g (0.25mol) of hydrogen peroxide, then add 1.40g (0.025mol) of potassium hydroxi...

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Abstract

The invention discloses a fluorine-carbon gemini surfactant for oil extraction and a preparation method thereof. The preparation method of the surfactant is as follows: 1) perfluorooctsulfunyl fluoride is dissolved in ethyl acetate, is firstly mixed with polyethylene polyamines and then reacts with potassium hydroxide after being heated to obtain diperfluoro octyl sulfamide; 2) diperfluoro octyl sulfamide is mixed with 2-chlorethanol in an organic solvent and reacts with potassium hydroxide to obtain N-N-alcohol diperfluoro octyl sulfamide; 3) N-N-alcohol diperfluoro octyl sulfamide is mixed with hydrogen peroxide and reacts with potassium hydroxide to obtain the target product. The fluorine-carbon gemini surfactant for oil extraction provided by the invention has comparatively low using concentration, can obviously reduce the surface tension of aqueous phase system, is excellent in temperature and salt resistance, can be used as a surfactant component in polymer-surfactant binary compound flooding and alkali-polymer-surfactant ternary compound flooding systems and can also be directly applied in surfactant flooding.

Description

technical field [0001] The invention relates to the field of surfactants, in particular to a fluorocarbon gemini surfactant and its preparation method and application. Background technique [0002] The use of surfactants for oil displacement is based on the theory proposed by J.J. Taber et al.: reduce interfacial tension and increase capillary number, thereby significantly reducing residual oil saturation. Surfactants used in oil and gas development are mainly used in surfactant flooding, polymer-surfactant binary compound flooding, and alkali-polymer-surfactant ASP flooding. At present, polymer-surfactant binary compound flooding and alkali-polymer-surfactant triple compound flooding are mostly carried out. The types of surfactants used are mainly petroleum sulfonates, synthetic alkylbenzene sulfonates, petroleum carboxylates, lignosulfonates and their modified products, biosurfactants, and gemini surfactants. At present, the following problems occur in the application of...

Claims

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Application Information

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IPC IPC(8): B01F17/00C09K8/584C09K23/00
Inventor 吕鑫张健
Owner CHINA NAT OFFSHORE OIL CORP
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