Dialkyl ether disulfonate surfactant and preparation method thereof

The technology of surfactant and bissulfonate is applied in the directions of sulfonate preparation, chemical instrument and method, drilling composition, etc., and can solve the problems of not being able to resist high salt and high calcium and magnesium ions, etc. To achieve the effect of convenient operation, simple preparation method and mild reaction conditions

Inactive Publication Date: 2012-06-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for high-salt and high-calcium-magnesium ion reservoirs, conventional sulfonate

Method used

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  • Dialkyl ether disulfonate surfactant and preparation method thereof
  • Dialkyl ether disulfonate surfactant and preparation method thereof
  • Dialkyl ether disulfonate surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Etherification reaction In a three-necked flask, first add 0.5 mol of ethylene glycol, then add a phase transfer catalyst of boron trifluoride ether 0.007 mol, and then slowly add 1.8 mol of epichlorohydrin, the addition is complete, and the reaction lasts for 8 h After the reaction, the system was cooled to room temperature, and then 50ml of 0.1mol / L sodium hydroxide ethanol solution was slowly added dropwise. After the dropwise addition, the reaction was continued at 25°C for 6 h. After the reaction was completed, the sodium chloride solid produced in the system was removed by suction filtration, and the ethanol and excess epichlorohydrin were distilled off by a rotary evaporator under reduced pressure. The distilled product was dissolved in saturated saline, extracted with petroleum ether, and the combined oil phase, distill off the solvent to obtain viscous transparent liquid ethylene glycol dioxypropylene ether;

[0027] (2) Ring-opening reaction Heat up the mi...

Embodiment 2

[0030] The critical micelle concentration (cmc) and surface tension of surfactants are important parameters for evaluating the performance of surfactants. The present invention adopts full-range rotary drop meter / interfacial tensiometer TX-500C to measure the performance of product, and experimental data is listed in table 1:

[0031] Table 1 Surface properties of different sulfonate surfactants (40°C)

[0032] Surfactant CMC / mmol.L -1 gamma cmc / mN m -1 TTSS-2-12 0.050 27.7 TTSS-2-14 0.0064 26.2 TTSS-2-16 0.0021 24.8 SDS 9.7 34.1

[0033] It can be seen from the above table that the cmc of TTSS-2-n series surfactants is 1-3 orders of magnitude lower than that of the same type of surfactants, such as sodium dodecylsulfonate (SDS), and the surface tension is also higher than that of SDS Smaller, with higher surface activity.

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Abstract

The invention relates to a dialkyl ether disulfonate surfactant used for tertiary oil recovery and heavy oil viscosity reduction and a preparation method thereof. The dialkyl ether disulfonate surfactant can improve the surface activity and reduce the critical micelle concentration. According to the technical scheme, the ialkyl ether disulfonate surfactant is 1,2-bis(2-oxygen propane sodium sulfonate-3-alkyl ether-propyl) glycol ether with the code of TTSS-2-n. The preparation method of the dialkyl ether disulfonate surfactant comprises the following steps: adding ethylene glycol, boron trifluoride ethyl ether and epichlorohydrin for reaction of 6-12h, and adding ethanol solution of NaOH for reaction of 6-9h to obtain ethylene glycol bisepoxypropyl ether; adding the product of reaction and fatty alcohol into potassium or sodium hydride for reaction at 80 DEG C, neutralizing, and reducing pressure to distill to obtain light yellow liquid; and adding and dissolving the product of reaction into the tetrahydrofuran propane sultone for reaction of 2-8h to finally obtain the 1,2-bis(2-oxygen propane sodium sulfonate-3-alkyl ether-propyl) glycol ether with the code of TTSS-2-n.The dialkyl ether disulfonate surfactant has a novel structure, high surface activity, low critical micelle concentration and good temperature and salt resistance and can be used for the exploitation of crude oil in the oil filed.

Description

technical field [0001] The invention relates to a dialkyl ether disulfonate surfactant used for tertiary oil recovery, crude oil viscosity reduction and emulsification in the petroleum industry and a preparation method thereof. Background technique [0002] Gemini surfactants have become a research hotspot in recent years. Gemini surfactants are a class of compounds with two hydrophobic chains, two ionic groups and a bridging group, similar to two common surfactants linked together by a bridge. In gemini surfactants, the two head groups are linked together by a linking group through a chemical bond, which promotes a fairly tight connection between the two surfactant monomers, making it easier to generate a stronger bond between the two hydrophobic chains. Interaction, which strengthens the hydrophobic binding force between the hydrophobic chains; secondly, the repulsion tendency between the head groups is greatly weakened by the chemical bond force, which is the fundamental...

Claims

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Application Information

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IPC IPC(8): C07C309/10C07C303/32C09K8/584
Inventor 周明叶仲斌赖南君
Owner SOUTHWEST PETROLEUM UNIV
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