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Surface active ionic liquid bactericide and application thereof in sterilization of oilfield injection water

A technology of ionic liquid and surface activity, applied in application, biocide, disinfectant, etc., to achieve strong bactericidal and drug resistance, high surface activity, and mild conditions

Inactive Publication Date: 2013-09-04
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the application of this kind of compound as a fungicide in oil fields

Method used

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  • Surface active ionic liquid bactericide and application thereof in sterilization of oilfield injection water
  • Surface active ionic liquid bactericide and application thereof in sterilization of oilfield injection water
  • Surface active ionic liquid bactericide and application thereof in sterilization of oilfield injection water

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] The preparation of example 1N-alkyl imidazoles

[0016] In a 100mL three-necked flask, add imidazole and potassium hydroxide, the molar ratio of the two is 1:1~1.2, and dimethyl sulfoxide (10~20mL) is used as a solvent, and the frequency is 30kHz, the power is 100w, and under the protection of nitrogen, In an ultrasonic reactor with a reaction temperature of 20-25°C, ultrasonication for 1 to 2 hours, cooling down to 0°C, and at this temperature, use a constant pressure dropping funnel to slowly drop bromoalkane ( 1-bromobutane, bromopentane, bromohexane), then heated up to 20-25°C, ultrasonically reacted for 3-4 hours, after the reaction, added 20-30mL distilled water to the reaction, extracted with 20-30mL chloroform , and then washed the chloroform layer with distilled water (4 × 20 ~ 30mL), the chloroform layer with anhydrous MgSO 4 After drying for 8-10 hours, the desiccant was removed by suction filtration, and the chloroform was distilled off from the filtrate un...

example 2

[0017] The preparation of example 2N-butyl-3-octyl (decyl, dodecyl, tetradecyl) imidazole surface-active ionic liquid

[0018] In a 100mL three-necked bottle with a drying device, add N-butylimidazole and bromooctane (bromodecane, bromododecane, bromotetradecane) respectively, and the molar ratio of the two is 1:1 ~2, nitrogen protection, start the ultrasonic reactor (ultrasonic frequency 40kHz, power 100w) for 25~35min, stop the ultrasonic for 5~10min intermittently, keep the water temperature at 60~70℃, react for 5~6h, and track the reaction by TLC. After the reaction was completed, it was washed with a mixed solvent of ethyl acetate and n-hexane (4×15-25 mL), and the remaining mixed solvent was evaporated to obtain a yellow viscous N-butyl-3-octyl (decyl, dodecyl , tetradecyl) imidazole surface-active ionic liquid.

[0019] N-butyl-3-octylimidazole surface active ionic liquid product 1 H-NMR (400MH Z , CDCl 3 , δ / ppmrelativetoTMS) verified as follows: 10.19 (1H, s, im...

example 3

[0023] Preparation of Example 3N-pentyl-3-octyl (decyl, dodecyl, tetradecyl) imidazole surface-active ionic liquid

[0024] In a 100mL three-neck flask with a drying device, add N-pentylimidazole and bromooctane (bromodecane, bromododecane, bromotetradecane) respectively, and the molar ratio of the two is 1:1 ~2, Nitrogen protection, start ultrasound (ultrasonic frequency 40kHz, power 100w) for 25-35min, stop intermittent ultrasound for 5-10min, keep the water temperature at 60-70℃, react for 5-6h, TLC tracking. After the reaction was completed, it was washed with a mixed solvent of ethyl acetate and n-hexane (4×15-25 mL), and the residual mixed solvent was evaporated to obtain a yellow viscous N-pentyl-3-octyl (decyl, dodecyl , tetradecyl) imidazole surface-active ionic liquid.

[0025] N-pentyl-3-octylimidazole surface active ionic liquid product 1 H-NMR (400MH Z , CDCl 3 , δ / ppmrelativetoTMS) verified as follows: 10.26 (1H, s, imidazole ring), 7.35 (2H, d, imidazole ri...

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Abstract

The invention discloses a surface active ionic liquid bactericide and an application thereof in sterilization of oilfield injection water. Surface active ionic liquid is obtained by firstly enabling imidazole to be reacted with bromoalkane to get N-alkyl imidazole, then enabling the N-alkyl imidazole to be reacted with long carbon chain bromoalkane and further getting the surface active ionic liquid under ultrasonic auxiliary conditions. The surface tension of the product is determined, thereby indicating that the series of compounds have higher surface activity. The compound obtained according to the invention can be used as the bactericide for the oilfield reinjection water so as to inhibit sulfate-reducing bacteria, iron bacteria and metatrophic bacteria, and the effective sterilization concentration is 30-60mg / L. The bactericide has the advantages of high efficiency, low toxicity, environmental friendliness and strong drug resistance, and a new applicable substance is provided for development of the bactericide for the oilfield reinjection water.

Description

technical field [0001] The invention relates to the application of a surface-active ionic liquid bactericide in the sterilization of oil field injection water. Background technique [0002] Surface-active ionic liquids are a class of environmentally friendly solvents. They are widely used in electrochemistry, organic synthesis, chemical separation, Materials preparation, biochemistry and petrochemicals, etc. In recent years, there are not many studies on surface-active ionic liquids. However, theoretically, a variety of surface-active ionic liquids can be designed and synthesized by changing the combination of different cations / anions. Studying the preparation and properties of surface-active ionic liquids can not only supplement new varieties of surfactants, expand the application fields of surfactants, but also expand new ways of applying ionic liquids. [0003] Most domestic oilfields are onshore oilfields. Oilfield water injection systems are mainly carried out under ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/58A01N43/50A01P1/00C09K8/54
Inventor 王丽艳徐群郑永杰马文辉赵冰于婷婷
Owner QIQIHAR UNIVERSITY
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