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Dodecyl amine modified carbon nanotube demulsifier as well as preparation method and application thereof

A technology of carbon nanotubes and dodecylamine, applied in chemical instruments and methods, chemical dehydration/demulsification, carbon compounds, etc., can solve the problems of complex preparation process of demulsifier and poor demulsification effect of demulsifier, etc. Achieve the effect of low cost, cost saving and explosion reduction

Pending Publication Date: 2020-11-13
YANGTZE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome above-mentioned technical deficiency, the purpose of the first aspect of the present invention is to propose a kind of preparation method of dodecylamine modified carbon nanotube demulsifier, this preparation method is simple, green and pollution-free and with low cost, solves The problem that the preparation process of the existing demulsifier is more complicated; the purpose of the second aspect of the present invention is to propose a dodecylamine-modified carbon nanotube demulsifier prepared by the above preparation method, which can realize stable The rapid demulsification of the crude oil emulsion, good demulsification performance, can solve the problem of poor demulsification effect of existing demulsifiers; the purpose of the third aspect of the present invention is to provide a kind of carbon nanotube demulsifier modified by dodecylamine application

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  • Dodecyl amine modified carbon nanotube demulsifier as well as preparation method and application thereof
  • Dodecyl amine modified carbon nanotube demulsifier as well as preparation method and application thereof
  • Dodecyl amine modified carbon nanotube demulsifier as well as preparation method and application thereof

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preparation example Construction

[0019] figure 1 Prepare the process flow sheet of the carbon nanotube demulsifier modified by dodecylamine for the present invention, as figure 1 Shown, the embodiment of the present invention provides a kind of preparation method of the carbon nanotube demulsifier modified by dodecylamine, and this preparation method comprises the steps:

[0020] (1) sulfuric acid solution of ammonium persulfate oxidizes carbon nanotubes to obtain oxidized carbon nanotubes with carboxyl groups on the surface;

[0021] (2) Grafting dodecylamine onto the surface of oxidized carbon nanotubes to obtain a dodecylamine-modified carbon nanotube demulsifier.

[0022] The present invention firstly prepares oxidized carbon nanotubes with carboxyl groups on the surface, then grafts dodecylamine onto the surface of oxidized carbon nanotubes, and reacts alkylamines with long hydrophobic chains with carboxyl groups on oxidized carbon nanotubes to obtain broken The emulsion can be distributed faster at th...

Embodiment 1

[0045] Embodiment 1 of the present invention provides a carbon nanotube demulsifier modified by dodecylamine, and the carbon nanotube demulsifier modified by dodecylamine is prepared by the following method:

[0046] (1) Dissolve ammonium persulfate in 1mol / L H 2 SO 4 In the solution, the concentration of ammonium persulfate is 2 mol / L to obtain a mixed solution I; 1 weight part of carbon nanotubes is added to 20 parts by weight of the above mixed solution I, and reacted at 70° C. for 10 h under stirring. After the reaction is completed, the oxidized carbon nanotubes are obtained by centrifugal separation, washing with distilled water and vacuum drying;

[0047] (2) Mix the above-mentioned oxidized carbon nanotubes, dodecylamine and dicyclohexylcarbodiimide according to a weight ratio of 1:100:20 to obtain mixture II; transfer mixture II to an oil bath, and React at 120° C. for 10 h. After the reaction is completed, the reaction product is washed several times with ethanol, ...

Embodiment 2

[0050] Embodiment 2 of the present invention provides a carbon nanotube demulsifier modified by dodecylamine, and the carbon nanotube demulsifier modified by dodecylamine is prepared by the following method:

[0051] (1) Dissolve ammonium persulfate in 1mol / L H 2 SO 4 In the solution, the concentration of ammonium persulfate is 1 mol / L to obtain a mixed solution I; 1 weight part of carbon nanotubes is added to 20 parts by weight of the above mixed solution I, and reacted at 70° C. for 8 hours under stirring, After the reaction is completed, the oxidized carbon nanotubes are obtained by centrifugal separation, washing with distilled water and vacuum drying;

[0052] (2) Mix the above-mentioned oxidized carbon nanotubes, dodecylamine and dicyclohexylcarbodiimide according to a weight ratio of 1:100:20 to obtain mixture II; transfer mixture II to an oil bath, and React at 120° C. for 10 h. After the reaction is completed, the reaction product is washed several times with ethano...

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Abstract

The invention discloses a preparation method of a dodecyl amine modified carbon nanotube demulsifier. The preparation method comprises the following steps: (1) oxidizing a carbon nanotube with a sulfuric acid solution of ammonium persulfate to obtain an oxidized carbon nanotube with carboxyl on the surface; and (2) grafting dodecyl amine to the surface of the oxidized carbon nanotube to obtain thedodecyl amine modified carbon nanotube demulsifier. The preparation method comprises the following steps: firstly, preparing an oxidized carbon nanotube with carboxyl on the surface; grafting dodecylamine to the surface of the oxidized carbon nanotube; and reacting alkyl amine with a hydrophobic long chain with carboxyl on the oxidized carbon nanotube. The obtained demulsifier can be distributedon an oil-water interface more quickly, the hydrophobic long chain of the demulsifier can enable the demulsifier to replace a natural surfactant more easily, rupture of an interfacial film is promoted to trigger demulsification, and the demulsifier can quickly demulsify stable crude oil emulsion and is excellent in demulsification performance. The invention also discloses the dodecyl amine modified carbon nanotube demulsifier prepared by the preparation method and application thereof.

Description

technical field [0001] The invention belongs to the technical field of petroleum additives, and in particular relates to a dodecylamine-modified carbon nanotube demulsifier and a preparation method and application thereof. Background technique [0002] The extraction process of crude oil is usually accompanied by a large amount of formation water, which finally exists in the form of emulsion. These emulsions are extremely unfavorable to oil industry production. Water is usually dispersed in crude oil in the form of liquid droplets, and most salts are dissolved in the water droplets. The natural active components of crude oil, such as asphaltene, colloid, crystalline wax and clay particles, etc., are adsorbed on the oil-water interface and form a firm viscoelastic interfacial film. The existence of the film inhibits or delays the coalescence of water droplets and makes It is difficult to separate the water from the emulsion. Due to the stability of the emulsion, it can exi...

Claims

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Application Information

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IPC IPC(8): C10G33/04C01B32/168C01B32/174
CPCC10G33/04C01B32/168C01B32/174
Inventor 米远祝叶泛申利伟罗霄罗跃颜学敏
Owner YANGTZE UNIVERSITY
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