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Preparation method for magnetic carbon nanotube demulsifier and application of magnetic carbon nanotube demulsifier

A magnetic carbon nanotube and carbon nanotube technology, applied in separation methods, magnetic field/electric field water/sewage treatment, grease/oily substance/suspton removal devices, etc., can solve the problem of limiting the application of nanotubes, not easy to separate and recycle and other problems, to achieve good demulsification effect, easy to implement, super paramagnetic effect

Active Publication Date: 2019-08-30
新疆澄润环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the unique physical and chemical properties of carbon nanotubes (CNTs), it is not easy to separate and recover after demulsification, which limits the application of carbon nanotubes (CNTs).

Method used

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  • Preparation method for magnetic carbon nanotube demulsifier and application of magnetic carbon nanotube demulsifier
  • Preparation method for magnetic carbon nanotube demulsifier and application of magnetic carbon nanotube demulsifier
  • Preparation method for magnetic carbon nanotube demulsifier and application of magnetic carbon nanotube demulsifier

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preparation example Construction

[0021] Embodiments of the present invention provide a method for preparing a magnetic carbon nanotube demulsifier, comprising the steps of:

[0022] (1) The carbon nanotubes are refluxed with the mixed acid to obtain oxidatively modified carbon nanotubes;

[0023] (2) Preparation of Fe 3 o 4 Precursor solution;

[0024] (3) The oxidatively modified carbon nanotubes and Fe 3 o 4 The precursor solution is uniformly mixed and reacted at 180-220° C. to prepare the magnetic carbon nanotube demulsifier.

[0025] As a preferred embodiment, the preparation of oxidatively modified carbon nanotubes in step (1) specifically adopts the following method: disperse the carbon nanotubes in mixed acid, and ultrasonicate for 0.5 to 1.5 hours to form a black suspension. The liquid is subjected to reflux reaction, and the obtained product is diluted and suction-filtered, and the filtrate is washed to 6.5-7.5, and then vacuum-dried at 55-65° C. to obtain oxidatively modified carbon nanotubes....

Embodiment 1

[0044] Embodiment 1 of the present invention provides a nano-demulsifier for magnetic carbon nanotube composite material, which is prepared by the following steps:

[0045] (1) Oxidative modification of carbon nanotubes: get 0.5g carbon nanotubes and disperse them in a mixed solution of 150mL nitric acid (65wt%) and 50mL concentrated sulfuric acid (98wt%), ultrasonically disperse for 30 minutes to form a black suspension, Heat the black suspension and reflux at 80°C for 10 hours. After cooling to room temperature, dilute the suspension to 2L with distilled water, cool to room temperature and filter it with a 0.45 μm microporous polytetrafluoroethylene filter membrane. Repeatedly washing with water until the pH value of the filtered solution is 7, and then vacuum-drying at 60°C to obtain oxidatively modified carbon nanotubes;

[0046] (2) Fe 3 o 4 Preparation of precursor solution: Take 0.25g Fe(acac) 3 Ultrasonic dispersion in 20g ethylene glycol for 0.5 hours to obtain ora...

Embodiment 2

[0054] Embodiment 2 of the present invention provides a nano-demulsifier for magnetic carbon nanotube composite material, which is prepared by the following steps:

[0055] (1) Oxidative modification of carbon nanotubes: get 1.0g carbon nanotubes and disperse them in a mixed solution of 150mL nitric acid (65wt%) and 50mL concentrated sulfuric acid (96wt%), ultrasonically disperse for 30 minutes to form a black suspension, Heat the black suspension and reflux at 80°C for 12 hours. After cooling to room temperature, dilute the suspension to 2L with distilled water, cool to room temperature and filter with a 0.45 μm microporous polytetrafluoroethylene filter membrane. Repeatedly washing with water until the pH value of the filtered solution is 7, and then vacuum-drying at 60°C to obtain oxidatively modified carbon nanotubes;

[0056] (2) Fe 3 o 4 Preparation of precursor solution: take 0.3g Fe(acac) 3 Ultrasonic dispersion in 28g ethylene glycol for 0.5 hours to obtain orange-...

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Abstract

The invention discloses a preparation method for a magnetic carbon nanotube demulsifier. The preparation method comprises the following steps: (1) subjecting carbon nanotubes and mixed acid to a refluxing reaction, so as to obtain oxidation modified carbon nanotubes; (2) preparing a Fe3O4 precursor solution; and (3) uniformly mixing the oxidation modified carbon nanotubes with the Fe3O4 precursorsolution, and carrying out a reaction at a temperature of 180 DEG C to 220 DEG C, thereby preparing the magnetic carbon nanotube demulsifier. According to the preparation method provided by the invention, firstly, the carbon nanotubes are subjected to oxidation modification through the mixed acid to introduce a large number of carboxyl groups and hydroxyl groups to defects and edges of the carbonnanotubes, and then, Fe3O4 nanoparticles are prepared in situ by utilizing a hydrothermal method to modify the oxidation modified carbon nanotubes; the preparation method is simple and is easy to implement; and the prepared magnetic carbon nanotube demulsifier can be used for rapidly achieving oil-water separation of oily wastewater and is relatively good in demulsification effect. A technical scheme of the invention further provides an application of the magnetic carbon nanotube demulsifier in the oily wastewater.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemicals, and in particular relates to a preparation method and application of a magnetic carbon nanotube demulsifier. Background technique [0002] With the increasing demand for petroleum energy, the petroleum industry produces a large amount of O / W oily wastewater. The petroleum hydrocarbons discharged from oily wastewater will not only cause serious ecological and environmental problems, but also threaten human health. On the one hand, the particle size of emulsified oil droplets is small, generally ranging from tens of nanometers to several microns, which makes it difficult to handle; on the other hand, natural surfactants are adsorbed on the surface of droplets to form a stable interface protective film, which is stable Strong. It is difficult to achieve efficient oil-water separation of oily wastewater by traditional methods such as gravity separation, centrifugation, flotation, and adso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/48C02F103/10
CPCC02F1/40C02F1/48C02F2103/10
Inventor 米远祝黄志明匡家哲叶泛杨欢蒋祝阳江夏张泽俊
Owner 新疆澄润环保科技有限公司
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