Green fluorine-containing magnetic demulsifier preparation method

A demulsifier and magnetic technology, which is applied in the field of preparation of green fluorine-containing magnetic demulsifiers, can solve the problems of waste of demulsifiers, inability to recycle, failure to meet the requirements of green development, etc.

Inactive Publication Date: 2022-01-11
BINZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in this kind of demulsifiers, that is, they cannot be recycled, so the demulsifiers will be wasted, and at the same time, they cannot meet the country's green development requirements.

Method used

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  • Green fluorine-containing magnetic demulsifier preparation method
  • Green fluorine-containing magnetic demulsifier preparation method
  • Green fluorine-containing magnetic demulsifier preparation method

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preparation example Construction

[0033] see figure 1 - Figure 11 , a preparation method of a green fluorine-containing magnetic demulsifier, comprising the following steps:

[0034] (1) Prepare a solvothermal reaction kettle, add iron acetylacetonate, oleic acid, hyperbranched fluorine-containing polyether into the reaction kettle, add the solvent dibenzyl ether, then stir the materials in the reaction kettle evenly, disperse them ultrasonically, and seal the reaction kettle , Purging the reactor with nitrogen to ensure that there is no air in the reactor.

[0035] (2) Heat the reactor to 200-260°C, and keep it warm for 3-8 hours. After the reaction, open the reactor after the temperature in the reactor drops to room temperature, and take out the products in the reactor after the reaction.

[0036] (3) Use a magnet to separate the product, configure a mixed solution of ethanol and n-hexane with a volume ratio of 1:1, clean the separated magnetic demulsifier, and then use a magnet to collect the demulsifier...

Embodiment 1

[0049] Put 0.2g iron acetylacetonate, 0.6g oleic acid, 0.6g hyperbranched fluorine-containing polyether in the reaction kettle, add 30ml dibenzyl ether, ultrasonically disperse the material for 60min, and then use nitrogen to deoxygenate for 60min to ensure that there is no air in the kettle Enter, seal the kettle, put the reaction kettle at 230 ° C for 5 hours, and use a magnet to separate the magnetic product, prepare a mixed solution of ethanol and n-hexane with a volume ratio of 1:1, and clean the separated product , and then use a magnet to separate the product, repeat the above steps 3 times, and dry the product in a vacuum oven at 60°C for 12 hours to obtain Magnetic Demulsifier A1.

[0050] The demulsifier that embodiment is made has measured its infrared spectrum characterization, as image 3 As shown, among them, 3413.56cm-1 is the stretching vibration peak of -NH- on fluoropolyether, 3239.98cm-1 is the stretching vibration peak of hydroxyl, and 1255.49cm-1 proves th...

Embodiment 2

[0055] Compared with Example 1, the mass ratio of iron acetylacetonate to oleic acid was adjusted to 1:5, the mass ratio of iron acetylacetonate to hyperbranched fluorine-containing polyether was 1:5, and the reaction temperature was 260°C for 3 hours. With the same steps, the magnetic demulsifier A2 was prepared.

[0056] Under the condition of the experimental temperature of 65°C, the demulsification experiment was carried out on the prepared demulsifier sample, and the oil removal rate was calculated after 120 minutes of demulsification. Among them, at a concentration of 1000ppm, the demulsification rate can reach 82.4%. The demulsification results are as follows: Figure 7 shown.

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Abstract

The invention discloses a green fluorine-containing magnetic demulsifier preparation method, which comprises: adding ferric acetylacetonate, oleic acid, dibenzyl ether and hyperbranched fluorine-containing polyether into a solvothermal reaction kettle, carrying out ultrasonic dispersion on the material, carrying out nitrogen deoxygenation, carrying out a solvothermal reaction to obtain a product, repeatedly cleaning with a prepared mixed solution of absolute ethyl alcohol and normal hexane in a volume ratio of 1: 1, and finally drying in a vacuum drying oven to obtain the magnetic demulsifier. According to the invention, the magnetic demulsifier is synthesized by grafting hyperbranched fluorine-containing polyether on the surfaces of magnetic Fe3O4 nanoparticles, a surfactant is mainly adsorbed on the surface of ferroferric oxide in forms of static electricity, covalent bonds and the like, the Fe3O4 nanoparticles have demulsification capability and magnetism, and area demulsifying agent with great development potential, and due to the agglomeration phenomenon is easily caused due to the self structure of the Fe3O4 nanoparticles, the novel magnetic demulsifier is prepared by combining the Fe3O4 nanoparticles with fluorine-containing polyether, so that great development potential is achieved.

Description

technical field [0001] The invention relates to the technical field of oilfield production fluid treatment, in particular to a preparation method of a green fluorine-containing magnetic demulsifier. Background technique [0002] With the gradual application of tertiary oil recovery in oilfields, the application of demulsifiers has also been greatly developed. As the oil-water emulsion becomes more stable due to ASP flooding, the requirements for demulsifiers are gradually increasing. In recent years, research on fluorine-containing polyether demulsifiers has become a hot spot. As the strongest bond in nature, the fluorine-carbon bond has better performance than ordinary demulsifiers, including high thermal stability and good compatibility. In addition, because fluorine atoms are difficult to be polarized, the polarity of fluorocarbon chains is lower than that of hydrocarbon chains, and the hydrophobic effect is stronger. It is precisely because of the advantages of fluorine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 贾新磊耿孝恒郭海莹
Owner BINZHOU UNIV
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