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Tetra-polysulfonate type surfactant and preparation method thereof

A technology of surfactant and tetrameric sulfonate, which is applied in the direction of sulfonate preparation, chemical instruments and methods, and drilling compositions, etc., can solve the problems that surfactants are difficult to achieve and the application requirements of complex formations, etc. Achieve the effects of convenient operation, simple preparation method and mild reaction conditions

Inactive Publication Date: 2012-10-03
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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  • Tetra-polysulfonate type surfactant and preparation method thereof
  • Tetra-polysulfonate type surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of pentaerythritol tetraglycidyl ether:

[0020] First, dissolve 1 mol of pentaerythritol in a mixed solution containing 150 ml of dimethyl sulfoxide and 6 mol of potassium hydroxide solution, and add 6 mol of epichlorohydrin dropwise to the reactor of the mixed solution under agitation. Then add dichloromethane to the reactor, filter to remove insoluble matter, remove dichloromethane by distillation under reduced pressure, then dissolve it with 100mL saturated saline and extract twice with 150mL ether, combine the organic phases and use anhydrous Magnesium sulfate is dried, and after decompression distillation, light yellow oily matter pentaerythritol tetraglycidyl ether is obtained;

[0021] (2) Preparation of 1,1,1,1-tetrakis(2-hydroxy-3-dodecyl ether-propanoxy)neopentane:

[0022] 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 pent...

Embodiment 2

[0027] The structure of the final product TTSS-4-12 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: 2 923 cm -1 and 2 854 cm -1 The asymmetric stretching vibration absorption peaks of methyl and methylene respectively; 1 377 cm -1 and 922 cm -1 It is the methyl bending vibration absorption peak; 1 443 cm -1 It is the methylene scissor vibration absorption peak; 732cm -1 It is the characteristic absorption peak linked by long-chain methylene; 1 193 cm -1 、621 cm -1 On the sulfonate group—SO 2 — The characteristic absorption peak of the functional group; 1 062 cm -1 and 1 110 cm -1 It is the characteristic absorption peak of ether bond. The characteristic absorption peaks in the figure correspond to the functional groups in the target product one by one, which proves that the synthesized product is the target product.

Embodiment 3

[0029] The critical micelle concentration (cmc) and surface tension of surfactants are important parameters for evaluating surfactants. The present invention adopts full-range rotary drop meter / interfacial tensiometer TX-500C surface tensiometer to measure the performance of the product, and the experimental data are listed in Table 1.

[0030]Table 1 Surface properties of different tetrameric sulfonate surfactants (50°C)

[0031] Surfactant cmc / mmol.l -1 gamma cmc / mN.m -1 TTSS-4-8 0.308 28.5 TTSS-4-10 0.072 26.5 TTSS-4-12 0.051 26.0 TTSS-4-14 0.0040 24.5 TTSS-4-16 0.0016 23.6 SDS 9.7 34.1

[0032] It can be seen from the above table that the cmc of TTSS-4-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 tetra-polysulfonate type surfactant which is used for tertiary oil recovery and heavy oil viscosity reduction and capable of enhancing surface activity and reducing critical micelle concentration, and a preparation method of the surfactant. The technical scheme is as follows: the surfactant is 1, 1, 1, 1-tetra (2-oxytrimethylene sodium sulfonate-3-alkylether-porpanoxy) neopentane with a code name of TTSS-4-n; the preparation method comprises steps of adding pentaerythritol, dimethyl sulfoxide and NaOH firstly, and then dropping epoxy chloropropane, reacting for 5-10h, so as to obtain pentaerythritol tetra-epoxy-propane ether; dropping the product in a reaction product of fatty alcohol and potassium or sodium hydride, reacting for 8-10h at 80 DEG C, reducing and distilling to obtain yellowish liquid; and adding the product in propane suhone dissolved into tetrahydrofuran, reacting for 12h, so as to obtain TTSS-4-n. The surfactant has the advantages of novel structure, simple manufacturing process, high surface activity, low critical micelle concentration and good temperature and salt resistance, and is used for oilfield oil extraction.

Description

technical field [0001] The invention relates to a tetrameric sulfonate 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 linking two or more traditional surfactant molecules with 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 These surfactants are becoming new products for oilfield applications by reducing the oil-water interfacial tension at low concentrations. [0003] Since the surface of the sandstone bottom layer of the oil reservoir is generally negatively charged, the ...

Claims

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Application Information

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IPC IPC(8): C09K8/584C07C309/09C07C303/32
Inventor 周明赵金洲王煦赵焰峰
Owner SOUTHWEST PETROLEUM UNIV
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