Environment-friendly magnetic expanded graphite and preparation method thereof

A technology of expanded graphite and magnetism, applied in the field of adsorption of magnetic expanded graphite and its preparation, can solve the problems of expanding the pollution area and the like

Inactive Publication Date: 2013-10-30
夏华松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery capacity of these methods varies greatly with changes in sea conditions and meteorological conditions. When the working conditions are bad, due to the movement of ocean currents and the turbulence of waves, the oil on the surface of the water body tends to drift with the waves and expand the polluted area.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: adopt citric acid gel sol method to prepare magnetically expanded graphite, its step is as follows: 1, make ferrite with citric acid complex ferric nitrate, barium nitrate: by molar ratio Ba(NO 3 ) 2 : Fe(NO 3 ) 3 : citric acid=1: 12: 19 Weigh raw materials, add distilled water to dissolve, drip ammonia water to adjust the pH value of the solution to 7, and obtain the required ferrite;

[0015] 2. Add expanded graphite to the ferrite obtained in step (1), and control the mass ratio of expanded graphite and ferrite to be 1:5;

[0016] 3. Put the solution obtained in step (2) in a 90-degree water bath and stir for 4-5 hours until the liquid is viscous and colloidal;

[0017] 4. Place the sol obtained in step (3) in an oven at 120°C for 4 hours to obtain a dry gel.

[0018] 5. Put the gel obtained in step (4) into a muffle furnace and heat it to 850° C. at a heating rate of 60° C. / h, keep it warm for 2 hours, and then cool it down naturally to obtain the ...

Embodiment 2

[0019] Embodiment 2: Adopt co-precipitation method to prepare magnetically expanded graphite, and its steps are as follows:

[0020] 1. Prepare FeCl separately 3 6H 2 O. Fecl 2 NaOH solution

[0021] 2. Fecl prepared in step (1) 3 6H 2 O. fecl 2 Pour the O solution into the NaoH solution, add expanded graphite, the ratio of expanded graphite to ferrite is 1:3, and stir at a temperature of about 80°C until the reaction is completed;

[0022] 3. The stirred solution obtained in step (2) is neutralized with HCI, Fe 3 o 4 Precipitation is wrapped on the surface of expanded graphite;

[0023] 4. Wash the product obtained in step (3) with water, separate it in a centrifuge, and dry it in vacuum to obtain the desired expanded graphite.

Embodiment 3

[0024] Embodiment 3: adopt adhesive process method to prepare magnetically expanded graphite, its steps are as follows:

[0025] 1. Weigh (measure) expanded graphite, ferrite powder and styrene-acrylic acid emulsion according to the ratio (mass ratio) of 1:1:0.1;

[0026] 2. Stir the ferrite powder obtained in step (1) and the styrene-acrylic acid emulsion evenly to obtain a mixture:

[0027] 3. Coagulate and harden the mixture in step (2), and pulverize it in a ball mill to obtain the desired magnetically expanded graphite.

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PUM

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Abstract

The invention belongs to the technical field of control and treatment of water area oil pollution, and particularly relates to absorbing magnetic expanded graphite for the water area oil pollution and a preparation method thereof. The magnetic expanded graphite is prepared through a chemical or physical method on a superficial deposit ferrite layer by adopting expanded black lead as a carrier; the magnetic expanded graphite is scattered to the surfaces of the water area oil pollutant to form a magnetic expanded graphite-oil pollutant mixed system; and the formed magnetic expanded graphite-oil pollutant mixed system generates a controllable motion under the action of a magnetic field so as to realize concentrated recovery and further achieve the purposes of the control and treatment of the water area oil pollution. The magnetic expanded graphite comprises the main chemical component of carbon without causing secondary pollution on the environment. The magnetic expanded graphite disclosed by the invention is unchanged in magnetic property after being adsorbed and collected, can still be used again after being appropriately treated and has popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of oil pollution control and treatment in water areas, and in particular relates to an adsorption magnetic expanded graphite used for oil pollution in water areas and a preparation method thereof. Background technique [0002] In modern society, petroleum plays an extremely important role as an energy source. However, in the process of oil extraction, processing, transportation and use, a considerable amount of oil leaks and is abandoned in rivers and ocean waters, posing a great threat to the environment. Controlling oil pollution in water areas has become a top priority. It is very difficult to remove oil pollution in water areas. At present, there are chemical methods and physical methods for oil pollution control in the world. [0003] Chemical method: According to the pollution situation, use emulsification dispersion, oil collection or oil coagulation method to control. For oil films with a thickne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 夏华松
Owner 夏华松
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