Method for preparing large-scale graphene in industrial large-scale reaction vessel

A reaction kettle, graphene technology, applied in graphene, nanotechnology, nanocarbon and other directions, can solve the problems of high impurity ion content, long production cycle and high cost, and achieve low impurity ion content, low cost and large output. Effect

Inactive Publication Date: 2012-10-24
泰州巨纳新能源有限公司
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Problems solved by technology

[0004] In order to solve the problems of low output, long production cycle, high cost, and high content of impurity ions in the existing method for preparing graphene, the invention provides a method for preparing large-scale graphene in an industrial large-scale reactor, which can improve the production capacity of graphene. Yield, reduce production cost, shorten production cycle, reduce impurity ion content

Method used

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  • Method for preparing large-scale graphene in industrial large-scale reaction vessel

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Effect test

Embodiment 1

[0040] 1. Graphite mixed with concentrated sulfuric acid

[0041] First, 50.0g of commercial graphite powder (purity 98%) and 2L of 98% concentrated sulfuric acid are added to a 5L industrial large-scale reactor and stirred to make them evenly mixed, while using a circulating cooling device to keep the temperature in the reactor below 20 degrees Celsius;

[0042] 2. Add potassium permanganate

[0043] After mixing evenly, slowly (very slowly, the temperature will rise sharply during heating) add 250g potassium permanganate into the above reaction kettle, and at the same time stir the above solution with a mechanical stirrer at high speed, so that the potassium permanganate can fully mix with the above solution Contact; during the addition process, use external circulation cooling equipment to keep the temperature of the reaction solution in the kettle below 20 degrees Celsius; at this time, the solution turned from black to dark green; after the addition, the temperature of th...

Embodiment 2

[0054] 1. Graphite mixed with concentrated sulfuric acid

[0055] First, 100g of graphite powder recovered from waste batteries and 4L of 98% concentrated sulfuric acid are added to a 10L industrial large-scale reactor and stirred to make them evenly mixed. At the same time, a circulating cooling device is used to keep the temperature in the reactor below 20 degrees Celsius;

[0056] 2. Add potassium permanganate

[0057] After mixing evenly, slowly (very slowly, the temperature will rise sharply during heating) add 500g potassium permanganate into the above reaction kettle, and at the same time stir the above solution with a mechanical stirrer at high speed, so that the potassium permanganate can fully mix with the above solution Contact; during the addition process, use external circulation cooling equipment to keep the temperature of the reaction solution in the kettle below 20 degrees Celsius; at this time, the solution turned from black to dark green; after the addition, ...

Embodiment 3

[0067] 1. Graphite mixed with concentrated sulfuric acid

[0068] First, 500g of commercial graphite powder (purity 99.8%) and 20L of 98% concentrated sulfuric acid are added to a 50L industrial large-scale reactor and stirred to make them evenly mixed. At the same time, a circulating cooling device is used to keep the temperature in the reactor below 20 degrees Celsius;

[0069] 2. Add potassium permanganate

[0070] After mixing evenly, add 2500g potassium permanganate into the above reaction kettle slowly (very slowly, the temperature will rise sharply during the heating process), and at the same time stir the above solution with a mechanical stirrer at a high speed, so that the potassium permanganate can fully mix with the above solution. Contact; during the addition process, use external circulation cooling equipment to keep the temperature of the reaction solution in the kettle below 20 degrees Celsius; at this time, the solution turned from black to dark green; after th...

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Abstract

The invention relates to a method for preparing large-scale graphene in an industrial large-scale reaction vessel, wherein graphite powder is oxidized in an industrial large-scale reaction vessel to obtain graphene slurry; the graphene slurry is washed, dried, and reduced in a high-temperature sintering furnace to obtain graphene. The method for obtaining graphene has the characteristics of high output, low cost, short preparation period, high yield, low impurity ion content, and the like. In addition, waste and recovered graphite powder is used as a carbon source, which effectively improves the utilization rate of environment resources; and the method is especially suitable for industrial large-scale production, and can promote the application of graphene in fields such as energy storage devices and the like.

Description

Technical field [0001] The invention relates to the production technology of nano-material graphene, in particular to a method for preparing large-scale and low-cost graphene by using a large-scale industrial reaction kettle. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms arranged in a honeycomb hexagonal planar structure. Graphene has excellent electrical, optical, thermal and mechanical properties, and has extremely high stability, and has extremely wide applications in many fields such as microelectronic devices, optoelectronic devices, and energy storage devices. [0003] The large-scale preparation of graphene is the basis for its wide application in the future, and factors such as cost control, output amplification, shortened production cycle, and environmental protection in the large-scale production process are all difficult problems that need to be overcome. In the prior art, the preparation method that is most likely t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00C01B32/184
Inventor 丁荣郭喜涛倪振华
Owner 泰州巨纳新能源有限公司
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