Sulfonate trimeric surfactant and preparation method thereof

A technology of surfactant and sulfonate type, which is applied in the field of sulfonate type trimerized surfactant for oil displacement and its preparation, can solve the problems of application requirements of complex formations, difficult to achieve by surfactants, etc. The method is simple, the operation is convenient, and the reaction conditions are mild.

Inactive Publication Date: 2012-03-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, most surfactants are difficult to meet the application requirements of complex formations, especially formations with high temperature, high salinity and high calcium and magnesium ions

Method used

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  • Sulfonate trimeric surfactant and preparation method thereof
  • Sulfonate trimeric surfactant and preparation method thereof
  • Sulfonate trimeric surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of Glycerol Triglycidyl Ether:

[0019] Dissolve 1 mol of glycerol in a mixed solution of 0.05 mol of tetrabutylammonium bisulfate and 6 mol of sodium hydroxide, and slowly drop the mixed solution into a reactor of 6 mol of epichlorohydrin under stirring, at room temperature After mixing evenly, heat up to 50°C, react for 5 hours, and after cooling, add 250ml of dichloromethane, filter, remove insoluble matter, and distill off the dichloromethane under reduced pressure to obtain a light yellow oily liquid glycerol triglycidyl ether ;

[0020] (2) Preparation of 1,2,3-tris(2-hydroxy-3-dodecyl ether-propanyl)glycerol ether:

[0021] Take 5 mol of dodecyl alcohol in a three-necked flask, slowly add 2 mol of metallic potassium at 60°C, and react until the potassium disappears, then add 1 mol of the glycerol triglycidyl ether prepared above, and react for 8 hours. After cooling, use dilute Hydrochloric acid solution to adjust the pH of the system to 7, then...

Embodiment 2

[0025] The structure of the final product TTSS-3-12 obtained in Example 1 was characterized by infrared spectroscopy, see the accompanying drawings for the spectrum, and the analysis of the spectrum is as follows: 2933.25 cm -1 for -CH 3 The asymmetric stretching vibration of , 2851.15 cm -1 for CH 2 Symmetric stretching vibration peak; 1461.75 cm -1 for -CH 2 - Deformation vibration, 1212.90 cm -1 , C-O stretching vibration, 1034.56 cm -1 It is the S=O symmetrical stretching vibration peak, 719.35 cm -1 for long chain-CH 2 - Swing vibration peaks.

Embodiment 3

[0027] The critical micelle concentration (cmc) and surface tension of surfactants are important parameters for evaluating surfactants. The present invention adopts full-range rotating drop meter / interfacial tensiometer TX-500C surface tensiometer to measure the performance of product, and experimental data is listed in table 1:

[0028] Table 1 Surface properties of different anionic surfactants (50°C)

[0029] Surfactant CMC / mmol.l -1 gamma cmc / mN.m -1 TTSS-3-10 0.080 26.8 TTSS-3-12 0.033 26.2 TTSS-3-14 0.0040 24.8 TTSS-3-16 0.0018 23.3 SDS 9.7 34.1

[0030] It can be seen from the above table that the cmc of TTSS-3-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 sulfonate trimeric surfactant used for oil displacement of high-temperature and high-salinity oil reservoirs, and a preparation method thereof. The surfactant is characterized in high temperature resistance and high salt resistance. The invention adopts the technical scheme as follows: the surfactant is 1,2,3-tri (2-sodium oxopropane sulfonate-3-alkyl ether-propyl) glycerol ether (TTSS-3-n); the preparation method comprises the following steps of: dissolving glycerol in a mixed solution of phase-transfer agent and alkali, adding epoxy chloropropane, allowing reactions to occur at 50 DEG C for 5 to 10 hours, filtering and distilling to obtain glycerol-tri(propylene oxide) ether, reacting the glycerol-tri(propylene oxide) ether with a reaction product of alkyl alcohols and potassium for 8 hours, drying and distilling to obtain a light yellow solid, dissolving the solid in tetrahydrofuran, mixing with 1,3-propanesultone, adding sodium hydride, and allowing reactions to occur for 12 hours to obtain the compound TTSS-3-n. the surfactant has a novel structure and a simple preparation method; is advantageous in higher surface activity, lower critical micelle concentration and good temperature resistance and salt resistance; and can be applied to crude oil extraction in oil fields.

Description

technical field [0001] The invention relates to a sulfonate-type trimerized surfactant used for oil displacement in high-temperature and high-salt oil reservoirs and a preparation method thereof. Background technique [0002] In recent years, oligomeric surfactants are becoming a research hotspot. These surfactants are usually formed by connecting two or more traditional surfactant molecules through a linker, and the molecules contain multiple hydrophobic chains and multiple hydrophilic chains. Compared with traditional surfactants, they have unique physical and chemical properties, good surface activity, lower critical micelle concentration, lower Krafft point, good temperature and salt resistance, and have been proven to be able to Lowering the oil-water interfacial tension at low concentrations, these surfactants are becoming a new generation of workhorses in oilfield applications. [0003] Since the surface of the sandstone bottom layer of the oil reservoir is generall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/42B01F17/04C09K8/584C09K23/42C09K23/04
Inventor 周明莫衍志赵焰峰
Owner SOUTHWEST PETROLEUM UNIV
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