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Expanded graphite preparation method

A technology of expanded graphite and graphite, which is applied in the field of expanded graphite preparation, can solve the problems of small expansion multiple and low yield, and achieve the effect of simple process and low energy consumption

Inactive Publication Date: 2017-06-30
TIANJIN RUISAIKE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the past, one-step method was used to produce expanded graphite, which had the disadvantages of low yield and small expansion multiple.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A preparation method of expanded graphite, the steps are as follows:

[0014] Primary expansion: 3 parts of graphite, 3 parts of glacial acetic acid, 1 part of sulfuric acid, keep at 600°C for 0.5 hours, and dry at 200°C; (2) Secondary expansion: 1 part of the reactant obtained in step (1), 1 part of glacial acetic acid , 700°C, kept for 0.5 hours, the final reactant was washed with water, and dried at 200°C to obtain the final product.

Embodiment 2

[0016] A preparation method of expanded graphite, the steps are as follows:

[0017] (1) Primary expansion: 3 parts of graphite, 8 parts of glacial acetic acid, 3 parts of sulfuric acid, keep at 950°C for 3 hours, and dry at 200°C; (2) Secondary expansion: 1 part of the reactant obtained in step (1), ice 3 parts of acetic acid were kept at 950°C for 1 hour, and the final reactant was washed with water and dried at 200°C to obtain the final product.

Embodiment 3

[0019] A preparation method of expanded graphite, the steps are as follows:

[0020] The optimized technical solution of the present invention is a preparation method of expanded graphite, the steps are as follows: (1) Primary expansion: 3 parts of graphite, 3 parts of glacial acetic acid, 2 parts of sulfuric acid, keep at 950°C for 2 hours, and dry at 200°C; ( 2) Secondary expansion: 1 part of the reactant obtained in step (1), 3 parts of glacial acetic acid, kept at 800°C for 1 hour, washed the final reactant with water, and dried at 200°C to obtain the final product.

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PUM

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Abstract

The invention provides an expanded graphite preparation method. The steps are as follows: (1) primary expansion: 3 parts of graphite, 3 to 8 parts of glacial acetic acid and 1 to 3 parts of sulfuric acid are kept under 600 DEG C to 950 DEG C for 0.5 to 3 hours, and drying is carried out under 200 DEG C; (2) secondary expansion: 1 part of reaction product obtained in step (1) and 1 to 3 parts of glacial acetic acid are kept under 700 DEG C to 950 DEG C for 0.5 to 1 hour, and after a final reaction product is washed with water and dried under 200 DEG C, a final product is obtained. The expanded graphite preparation method provided by the invention, which adopts the secondary expansion technique, has the advantages of high yield, low reaction temperature, environment-friendliness, no pollution and the like.

Description

technical field [0001] The invention relates to a method for preparing expanded graphite. Background technique [0002] Due to its loose and porous structure, expanded graphite has great adsorption capacity for most organic compounds. 1 g of high-quality expanded graphite can absorb at least 80 g of petroleum. At present, expanded graphite is mostly used to absorb grease and oil. At the same time, expanded graphite, which is very easy to absorb oil, hydrophobic substances and organic molecules, is also used for water environmental protection treatment. [0003] Compared with other adsorbents, expanded graphite has obvious advantages: expanded graphite has a strong adsorption capacity for oils and fats, floats on the water surface after oil absorption, and is easy to recycle. Heating extraction, combustion and other methods, and no secondary pollution. [0004] In the past, one-step method was used to produce expanded graphite, which had the disadvantages of low yield and ...

Claims

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Application Information

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IPC IPC(8): C01B32/21
Inventor 宋振兴谢玉娟
Owner TIANJIN RUISAIKE NEW MATERIAL TECH CO LTD