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Demulsifying agent, carbon nanotube/hyperbranched polymer, preparation method of polymer and application of demulsifying agent

A technology of hyperbranched polymers and carbon nanotubes, applied in the fields of carbon nanotubes/hyperbranched polymers and their preparation, and demulsifiers, can solve the problems that cannot be used to deal with the difficulty of demulsification, such as water-in-oil, and reduce the oil-water interface tension effect

Active Publication Date: 2021-03-02
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned patented technology can be applied to emulsion breaking, it can only be applied to oil-in-water emulsions, including diesel oil emulsions and oily wastewater, and cannot be used to deal with water-in-oil (W / O) emulsions that are more difficult to break.
[0005] Therefore, it is still a big challenge to seek the preparation method of the demulsifier which is easy to apply to the water-in-oil (W / O) emulsion and the new demulsifier with excellent performance.

Method used

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  • Demulsifying agent, carbon nanotube/hyperbranched polymer, preparation method of polymer and application of demulsifying agent
  • Demulsifying agent, carbon nanotube/hyperbranched polymer, preparation method of polymer and application of demulsifying agent
  • Demulsifying agent, carbon nanotube/hyperbranched polymer, preparation method of polymer and application of demulsifying agent

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preparation example Construction

[0024]A preparation method of carbon nanotube / hyperbranched polymer includes the following steps:

[0025]According to parts by weight, mix 5-15 parts of carbon nanotubes, 15-30 parts of sodium nitrite and 15-30 parts of ethylenediamine, and then add 20-25 parts of sulfuric acid with a concentration of 70% or more under stirring. React at 40-80°C for 1-5 hours to obtain amine-modified carbon nanotubes, then wash with organic solvent to obtain amine-modified carbon nanotubes, until the filtrate is colorless, and disperse the washed amine-modified carbon nanotubes in water. Then it is dried by centrifugation and washing with distilled water until pH=7; wherein, the carbon nanotubes are multi-walled carbon nanotubes, with a purity of >95%, a diameter of 8-15 nm, and a length of 30-50 μm; The solvent is preferably N,N-dimethylformamide;

[0026]Mix the amine-modified carbon nanotubes, ethylenediamine and methyl acrylate according to the mass ratio (10-30): (1-3): (1-7), and then mix them in a...

Embodiment 1

[0033]This embodiment provides a carbon nanotube / hyperbranched polymer demulsifier for W / O emulsion, and the demulsifier is obtained by the following steps:

[0034]Calculated in parts by weight, 10 parts by weight of carbon nanotubes, 23 parts by weight of sodium nitrite and 22.5 parts by weight of ethylenediamine are uniformly mixed to obtain solution I; 21 parts by weight of concentrated sulfuric acid with a concentration of 75% are added dropwise to the above solution I In the medium, the reaction was carried out at 60°C for 1 hour under stirring, and then the modified carbon nanotubes were washed with N,N-dimethylformamide until the filtrate was colorless. The modified carbon nanotubes are dispersed in water, then centrifuged and washed with distilled water until pH=7, and then dried to obtain the amine modified carbon nanotubes.

[0035]The amine-modified carbon nanotubes, ethylenediamine and methyl acrylate are mixed uniformly according to a mass ratio of 10:1:7 to obtain mixture I...

Embodiment 2

[0043]This embodiment provides a carbon nanotube / hyperbranched polymer demulsifier for W / O emulsion, and the demulsifier is obtained by the following steps:

[0044]Calculated in parts by weight, 15 parts by weight of carbon nanotubes, 30 parts by weight of sodium nitrite and 30 parts by weight of ethylenediamine are uniformly mixed to obtain solution I; 25 parts by weight of concentrated sulfuric acid with a concentration of 75% are added dropwise to the above solution I In the medium, the reaction was carried out at 50°C for 5 hours under stirring, and then the modified carbon nanotubes were washed with N,N-dimethylformamide until the filtrate was colorless. The modified carbon nanotubes are dispersed in water, then centrifuged and washed with distilled water until pH=7, and then dried to obtain the amine modified carbon nanotubes.

[0045]The amine-modified carbon nanotubes, ethylenediamine, and methyl acrylate were mixed uniformly according to a mass ratio of 15:2:5 to obtain mixture ...

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Abstract

The invention relates to a demulsifier, a carbon nanotube / hyperbranched polymer, a preparation method of the polymer and application of the demulsifying agent. The method comprises the following steps: mixing amine modified carbon nanotubes, ethylenediamine and methyl acrylate, conducting reacting at 30-50 DEG C, gradually conducting heating, and carrying out reduced pressure distillation to obtain the carbon nanotube / hyperbranched polymer. The invention also provides the carbon nanotube / hyperbranched polymer prepared by the preparation method. In addition, the invention also provides the demulsifier which comprises the carbon nanotube / hyperbranched polymer. The invention also provides application of the demulsifier in separation of water-in-oil emulsion. The carbon nanotube / hyperbranchedpolymer can significantly reduce the oil-water interfacial tension and promote the occurrence of a demulsification process, and the demulsification efficiency of a water-in-oil emulsion is as high as93.1%.

Description

Technical field[0001]The invention relates to the field of organic-inorganic composite functional materials, in particular to a demulsifier, a carbon nanotube / hyperbranched polymer, and a preparation method and application thereof.Background technique[0002]Although water and crude oil are two immiscible phases, due to the presence of interfacial active substances, fine solid particles and shearing effects, a large amount of highly stable water-in-oil (W / O) will be produced during the production of crude oil. Lotion. Crude oil extracted in the form of emulsion will cause a series of problems in subsequent transportation and refining, so it is very important to demulsify the extracted crude oil emulsion.[0003]Demulsification technology mainly includes chemical demulsification, biological demulsification and physical demulsification. Chemical demulsification is a technology that increases the efficiency of demulsification and reduces the stability of emulsions by adding demulsifiers. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01D17/05
CPCC08G83/001B01D17/04
Inventor 米远祝叶泛谢芳琴颜学敏罗跃
Owner YANGTZE UNIVERSITY
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