Fluorocarbon gemini betaine surfactant, preparation method and application thereof

A technology of surfactant and fluorocarbon betaine, which is applied in the preparation of sulfonamides, chemical instruments and methods, organic chemistry, etc., can solve the problem of insufficient surface activity and achieve the effect of avoiding environmental hazards

Active Publication Date: 2020-06-26
西安弘富源新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention obviously solves the problem that the surface activity is not high enough due to the short fluorocarbon chain segment. The diisocyanate cross-linked fluorocarbon gemtaine surfactant is used as a chemical oil displacement agent to improve the recovery of crude oil in tertiary oil recovery.

Method used

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  • Fluorocarbon gemini betaine surfactant, preparation method and application thereof
  • Fluorocarbon gemini betaine surfactant, preparation method and application thereof
  • Fluorocarbon gemini betaine surfactant, preparation method and application thereof

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preparation example Construction

[0031] Concrete, the preparation method of fluorocarbon gemtaine betaine surfactant and be used for ultra-low interfacial tension oil displacement agent, comprise the following steps:

[0032] (1) Dissolve N,N-dimethyl-1,3-propylenediamine in isopropyl ether, add it into a three-necked flask, and place it in an ice-water bath (temperature below 10°C). Dissolve perfluorobutylsulfonyl fluoride in isopropyl ether, add it to the dropping funnel, and slowly drop it into the three-necked flask, the temperature is always below 10°C. Wherein the molar ratio of perfluorobutylsulfonyl fluoride to N,N-dimethyl-1,3-propylenediamine is 1:(1-1.2). After dropping, raise the temperature to 55-70° C., react for 5-7 hours, then filter with absolute ethanol, and then heat and dry to remove the absolute ethanol to obtain an intermediate.

[0033] (2) The intermediate and 3-chloro-2 hydroxypropanesulfonate obtained in step 1 are added to a flask having a mixed solvent of water and isopropanol, wh...

Embodiment 1

[0039] Dissolve N,N-dimethyl-1,3-propanediamine in isopropyl ether and add it into a three-necked flask. Dissolve perfluorobutylsulfonyl fluoride in isopropyl ether, add it to the dropping funnel, and slowly drop it into the three-necked flask, the temperature is always 9°C. The molar ratio of perfluorobutylsulfonyl fluoride to N,N-dimethyl-1,3 propanediamine is 1:1.05. After dropping, the temperature was raised to 60° C., and reacted for 6 hours, then suction-filtered with absolute ethanol, and then heated and dried to remove absolute ethanol to obtain an intermediate. Take the intermediate and 3-chloro-2-hydroxypropanesulfonate in a molar ratio of 1:1.05, add a mixed solvent with a mass ratio of water and isopropanol of 10:2, react at 85°C for 2 hours, and cool the reactant to 50 After ℃, a certain amount of anhydrous sodium carbonate was added, and the reaction was continued at 85 ℃ for 6 hours to obtain a crude product. The crude product was dried in vacuo and extracted ...

Embodiment 2

[0042] Dissolve N,N-dimethyl-1,3-propanediamine in isopropyl ether and add it into a three-necked flask. Dissolve perfluorobutylsulfonyl fluoride in isopropyl ether, add it into the dropping funnel, and slowly drop it into the three-neck flask, the temperature is always 8°C. The molar ratio of perfluorobutylsulfonyl fluoride to N,N-dimethyl-1,3 propanediamine is 1:1.1. After dropping, raise the temperature to 70°C, react for 6 hours, then filter with absolute ethanol, then heat and dry to remove absolute ethanol to obtain an intermediate. Take the intermediate and 3-chloro-2-hydroxypropanesulfonate in a molar ratio of 1:1.05, add a mixed solvent with a mass ratio of water and isopropanol of 10:2, react at 85°C for 2 hours, and cool the reactant to After 50°C, a certain amount of anhydrous sodium carbonate was added, and the reaction was continued at 85°C for 6 hours to obtain a crude product. The crude product was dried in vacuo and extracted with acetone to give fluorocarbo...

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Abstract

The invention discloses a fluorocarbon gemini betaine surfactant, a preparation method and application thereof. The method comprises the following steps: 1) dissolving N, N-dimethyl-1, 3-propane diamine into a first solvent, dissolving perfluorobutyl sulfonyl fluoride into the first solvent, adding the mixture into a dropping funnel, slowly dropping the product into a three-neck flask, carrying out heating reaction, then carrying out suction filtration by anhydrous ethanol, and then performing heating and drying to remove the anhydrous ethanol so as to obtain an intermediate; 2) adding a sulfonate and a second solvent into the intermediate, adding anhydrous sodium carbonate, and further carrying out reaction to obtain a crude product; drying the crude product in vacuum, and then performingextraction with acetone to obtain fluorocarbon betaine (product I); 3) adding a catalyst and a third solvent into the product I, adding diisocyanate dropwise, and performing vacuum drying to obtain fluorocarbon gemini betaine (product II); and 4) preparing a surfactant aqueous solution from the fluorocarbon gemini betaine (product II). The surfactant solves the problem that the surface activity is not high enough due to short fluorocarbon fragments, and the surfactant is used as a chemical oil displacement agent to improve the recovery ratio of crude oil in tertiary oil recovery.

Description

technical field [0001] The invention relates to the synthesis of gemtaine and its application, in particular to a fluorocarbon gemtaine surfactant and its preparation method and application. Background technique [0002] Fluorocarbon surfactants have high surface activity, high thermal stability and high chemical stability due to the fluorocarbon chain in the molecule, and they are both water-repellent and oil-repellent, and have excellent wettability, oil repellency and low friction , antistatic, permeability and antifouling properties, and less dosage, excellent performance. Therefore, fluorocarbon surfactants have great application potential in the field of tertiary oil recovery, have broad application prospects and market value, and are currently the research topic of many domestic scientific research institutes and oilfield chemists. Fluorocarbon surfactants can increase and improve the wettability, permeability, diffusivity and fluidity of crude oil in formation rocks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C311/05C07C303/38C07C303/40C09K8/584C09K8/60
CPCC07C303/38C07C303/40C07C311/05C09K8/584C09K8/602C07C2601/14
Inventor 王晨田咪咪杨晓武李培枝
Owner 西安弘富源新能源科技有限公司
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