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Viscoelastic solution containing trimeric anionic surfactant component and preparation method thereof

A surfactant and polyanion technology, which is applied in the preparation of organic compounds, oxygen-containing compounds, chemical instruments and methods, etc., can solve the problems of high surfactant concentration and difficult post-processing, and achieve the effect of reducing the cost of use

Active Publication Date: 2015-07-29
濮阳市东浦科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that a large amount of salt needs to be added to the solution in the prior art, and the concentration of the surfactant is relatively high, and the post-treatment is difficult, the present invention provides a viscoelastic surface obtained by compounding anionic and cationic surfactants. Preparation method of active agent solution

Method used

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  • Viscoelastic solution containing trimeric anionic surfactant component and preparation method thereof
  • Viscoelastic solution containing trimeric anionic surfactant component and preparation method thereof
  • Viscoelastic solution containing trimeric anionic surfactant component and preparation method thereof

Examples

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Embodiment 1

[0015] Embodiment 1: the synthesis of α-bromotetradecanoic acid methyl ester. Add tetradecanoic acid (150g, 0.6568mol) into a 500ml three-necked flask, melt at 65°C, slowly add thionyl chloride (106.6g, 0.821mol) dropwise under stirring, raise the temperature to 90°C after the dropwise addition, add A little elemental iodine was used as an initiator, and liquid bromine (131.2g, 0.821mol) dried by concentrated sulfuric acid was slowly added dropwise, stirred and refluxed for 12 hours, and the temperature was lowered to 65°C, and anhydrous methanol (52.6g, 1.64mol) was added dropwise with stirring. mol), reflux for 2-4 hours after the addition. After cooling, wash with water 3-4 times, then wash the organic layer with 50 ml of saturated sodium sulfite solution until neutral, and finally wash with water 3-4 times. The organic layer was dried overnight by adding anhydrous magnesium sulfate. After filtration, the crude product was distilled under reduced pressure to obtain α-brom...

Embodiment 2

[0016] Embodiment 2: the synthesis of anionic trimeric surfactant. Add phloroglucinol (2g, 0.016mol)\activated molecular sieve-treated N,N-dimethylformamide (30ml) into a 250ml three-necked flask, and nitrogen atmosphere prevents phenol oxidation. Add anhydrous potassium carbonate (18g, 0.13mol) and N,N-dimethylformamide (20ml), heat up to 60°C, add α-bromotetradecanoic acid methyl ester (17.8g, 0.056) in one go (dissolved In N,N-dimethylformamide), after 4h, the temperature was raised to 85°C, and the reaction was carried out for 24 hours. After cooling, a yellow filtrate was obtained by suction filtration, and N,N-dimethylformamide in the filtrate was removed under reduced pressure. Transfer the filtrate to a separatory funnel, first add 30ml of petroleum ether, and then add 50ml of ice water each time to extract the organic layer for 3-4 times. Add anhydrous magnesium sulfate to dry, remove petroleum ether under reduced pressure after filtration, and separate by column ch...

Embodiment 3

[0017] Embodiment 3: the preparation of viscoelastic surfactant solution. Prepare 3ml of trimeric surfactant solution of 50mmol / L, add appropriate amount of cationic surfactant solid to it respectively, make the molar ratio of anionic surfactant and cationic surfactant reach 1:0.1, 1:0.2 and 1 respectively :0.3, a series of viscoelastic surfactant solutions are obtained after dissolving.

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Abstract

The invention relates to a preparation method of a viscoelastic surfactant solution which contains a trimeric anionic surfactant component and is obtained by compounding of anionic and cationic surfactants. The structural of the main component, an anionic surfactant, is as shown in the specification. The cationic surfactant can be any one of dodecyltrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB) or cetyltrimethylammonium bromide (CTAB). The longer the hydrophobic chain length of the cationic surfactant is, the more excellent the effect of the viscoelastic solution formed by the cationic surfactant and the trimeric anionic surfactant is. Preparation of the surfactant solution comprises two main processes, namely synthesis and compounding of trimeric surfactants. The compounded surfactant solution at low concentration shows the main characteristic of elasticity. The solution can be gel-like and can be applied in the formula of an oilfield fracturing fluid, a drag reducer and a daily cleaning agent.

Description

technical field [0001] The invention relates to a viscoelastic surfactant solution obtained by compounding anion and cation, in particular to a viscoelastic solution containing a trimeric anion surfactant component and a preparation method thereof, belonging to the field of surfactant science. Background technique [0002] Surfactant viscoelastic solutions are widely used in daily life and industrial production, such as fracturing fluid for oil recovery in oil fields, drag reducer and daily cleaning agent formulations, etc. A common surfactant viscoelastic solution can be obtained by adding a large amount of inorganic or organic salts to a single-headed, single-tailed surfactant solution. This kind of system usually requires a high concentration of surfactant, which increases the cost on the one hand, and causes unnecessary pollution to the system on the other hand, increasing the difficulty of post-processing. [0003] The viscoelasticity of the surfactant solution is rela...

Claims

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Application Information

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IPC IPC(8): B01F17/44B01F17/18C07C27/02C07C59/68C09K23/44C09K23/18
Inventor 宋冰蕾周萍萍裴晓梅翟兆兰余小娜
Owner 濮阳市东浦科技发展有限公司
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