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Surfactant with self-demulsification capability as well as preparation method and application of surfactant

A surfactant and capacity technology, applied in the field of surfactants with self-demulsification ability and its preparation, can solve the problems such as ineffective effects, and achieve the effects of reducing the viscosity of heavy oil, strong emulsifying ability, and wide source of raw materials

Active Publication Date: 2020-12-15
宁夏宇航油田工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of adding various demulsifiers is often used to realize the oil-water separation of emulsified heavy oil, but the effect is not obvious. It is still necessary to find a flexible and efficient method to realize the synergy between emulsification and demulsification of heavy oil

Method used

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  • Surfactant with self-demulsification capability as well as preparation method and application of surfactant
  • Surfactant with self-demulsification capability as well as preparation method and application of surfactant
  • Surfactant with self-demulsification capability as well as preparation method and application of surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add dodecylamine (18.5g, 0.1mol) and cyclobut-3-ene dicarboxylic anhydride (24.8g, 0.2mol) dropwise successively in a 250mL three-necked flask equipped with a reflux condenser, nitrogen gas 3 times, Then heated to 180° C. for 3 h, and TLC (Thin Layer Chromatography, thin layer chromatography) monitored the completion of the reaction. After the reaction was completed, it was cooled to room temperature, 50 mL of distilled water was added, extracted three times with 80 mL of ethyl acetate, dried over anhydrous magnesium sulfate, filtered, concentrated under reduced pressure to obtain a crude product, and finally separated by a column to obtain a colorless oily imide.

[0037] (2) Add imide and 40mL distilled water into a 250mL three-necked flask, place in an ice-salt bath and cool to 0°C, slowly add potassium permanganate KMnO 4 (20g, the addition time is 40min), after all the addition is completed, the temperature is slowly raised to 90°C for 12h. Add 80 mL of satura...

Embodiment 2

[0040] (1) Add dodecylamine (18.5g, 0.1mol) and cyclobut-3-ene dicarboxylic anhydride (24.8g, 0.2mol) dropwise successively in a 250mL three-necked flask equipped with a reflux condenser, nitrogen gas 3 times, Then heated to 150° C. for 2 h, and TLC (Thin Layer Chromatography, thin layer chromatography) monitored the completion of the reaction. After the reaction was completed, it was cooled to room temperature, 50 mL of distilled water was added, extracted three times with 80 mL of ethyl acetate, dried over anhydrous magnesium sulfate, filtered, concentrated under reduced pressure to obtain a crude product, and finally separated by a column to obtain a colorless oily imide.

[0041] (2) Add imide and 40mL distilled water into a 250mL three-necked flask, place in an ice-salt bath and cool to 0°C, slowly add potassium permanganate KMnO 4 (15.8g, the addition time is 40min), after all the addition is completed, the temperature is slowly raised to 100°C for 10h. Add 80 mL of sat...

Embodiment 3

[0044] (1) Add dodecylamine (18.5g, 0.1mol) and cyclobut-3-ene dicarboxylic anhydride (24.8g, 0.2mol) dropwise successively in a 250mL three-necked flask equipped with a reflux condenser, nitrogen gas 3 times, Then heated to 200° C. for 5 h, and TLC (Thin Layer Chromatography, thin layer chromatography) monitored the completion of the reaction. After the reaction was completed, it was cooled to room temperature, 50 mL of distilled water was added, extracted three times with 80 mL of ethyl acetate, dried over anhydrous magnesium sulfate, filtered, concentrated under reduced pressure to obtain a crude product, and finally separated by a column to obtain a colorless oily imide.

[0045] (2) Add imide and 40mL distilled water into a 250mL three-necked flask, place in an ice-salt bath and cool to 0°C, slowly add potassium permanganate KMnO 4 (25g, the addition time is 40min), after all the addition is completed, the temperature is slowly raised to 90°C for 12h. Add 80 mL of satura...

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Abstract

The invention discloses a surfactant with self-demulsification capability as well as a preparation method and application of the surfactant. The method comprises the following steps: 1) sequentially adding dodecylamine and cyclobutane-3-alkene dicarboxylic anhydride into a three-neck flask, introducing nitrogen, carrying out reaction at 150-200 DEG C for 2-5 hours, and carrying out nucleophilic addition elimination reaction to generate imide; and 2) diluting the reaction solution, slowly adding potassium permanganate at 0 DEG C, heating to carry out oxidation reaction to generate carboxyl, andreacting at 90-100 DEG C for 10-12 hours; and after the reaction is finished, adding sodium sulfite to remove excessive potassium permanganate, filtering by adopting a diatomite and extracting impurities by adopting ethyl acetate, collecting a water phase, regulating the pH value to 2-4 to separate out a product, filtering and drying to constant weight to obtain a final product. The surfactant with the self-demulsification capability is applied to thick oil emulsification, the viscosity of thick oil can be reduced, the pH value of emulsified thick oil is increased before the surfactant entersoil refining, and the surfactant can realize demulsification of the emulsified thick oil due to hydrolysis inactivation.

Description

technical field [0001] The invention belongs to the field of functional surfactants, in particular to a surfactant with self-demulsification ability, its preparation method and application. Background technique [0002] Heavy oil is an important part of oil and gas resources, and high-viscosity heavy heavy oil resources are widely distributed. However, its high viscosity restricts its fluidity during transportation to a certain extent, which brings great difficulties to the mining process. In order to reduce the viscosity of heavy oil in well bores and gathering pipelines, and at the same time solve the problem of blockage of heavy oil reservoirs and well bores, the technology of emulsifying heavy oil with surfactants to reduce its viscosity is often used in development and production to increase the fluidity of crude oil. In order to improve the efficiency of heavy oil production and ensure the smooth progress of heavy oil production. However, before crude oil refining, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D207/416B01F17/32C09K8/584F17D1/16C10G33/04C09K23/32
CPCC07D207/416C09K8/584F17D1/16C10G33/04C09K23/00
Inventor 王晨侯妍王海花杨晓武李刚辉张康
Owner 宁夏宇航油田工程有限公司
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