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Method for preparing expanded graphite through chemical oxidation

A technology of expanded graphite and chemical oxidation, which is applied in the field of graphite, can solve the problems of high price and low output, and achieve the effects of large output, simple preparation method, and high expansion multiple

Inactive Publication Date: 2015-05-06
QINGDAO TAIHAODA CARBON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of graphite raw materials used in traditional expanded graphite is generally above 50 mesh, the output is low, and the price is high

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0013] The method for preparing expanded graphite by chemical oxidation in this embodiment includes the following steps: (1) Put the natural flake graphite into a container, then add sulfuric acid, and stir while adding sulfuric acid, and add potassium permanganate after stirring evenly, Continue to stir for 5 minutes, then react at a temperature of 60°C for 30 minutes, the concentration of the sulfuric acid is 98%, the diameter of the natural flake graphite is less than 2 μm, and the weight of the natural flake graphite, sulfuric acid, and potassium permanganate The ratio is 1:6:1.3; (2) The reacted product is washed to neutrality, then dehydrated and dried, and then expanded at a temperature of 900°C to obtain expanded graphite.

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Abstract

A disclosed method for preparing expanded graphite through chemical oxidation comprises: putting natural flake graphite into a container, adding sulfuric acid with stirring, adding potassium permanganate after the mixture is stirred uniformly, continuing to stir for 5-10 min, then reacting under the temperature condition of 60 DEG C for 30 min, wherein the diameter of natural flake graphite is less than 2 mu m, the mass ratio of natural flake graphite, sulfuric acid and potassium permanganate is 1:6:(1.2-1.5); and washing the reacted product with water to be neutral, then dewatering and airing, and expanding under the temperature condition of 850-950 DEG C, so as to prepare the expanded graphite. By taking natural graphite as the raw material and potassium permanganate as an oxidant for preparing expanded graphite, graphite flake is embedded with sulfuric acid and an interlaminar compound is formed, the expanded graphite prepared after expanding is high in expansion multiple, the preparation method is simple, and the output is high.

Description

[0001] technical field [0002] The invention belongs to the technical field of graphite, and in particular relates to a method for preparing expanded graphite by chemical oxidation. [0003] Background technique [0004] Expanded graphite is a graphite worm formed after natural graphite is oxidized and expanded. Because of its unique sheet structure, it has been widely concerned in materials, physics, and chemistry in recent years. The particle size of graphite raw materials used in traditional expanded graphite is generally above 50 mesh, and the output is low and the price is high. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems in the prior art, the object of the present invention is to provide a method for preparing expanded graphite by chemical oxidation, which is simple and has high yield. [0007] The method for preparing expanded graphite by chemical oxidation comprises the following steps: (1) putting nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 乔帅
Owner QINGDAO TAIHAODA CARBON MATERIAL
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