Preparation method and equipment of graphene oxide or graphite oxide

A technology of graphene and graphite, which is applied in the field of graphene, can solve the problems of preparation efficiency research, long purification time, and no solution to the preparation time, so as to avoid the effect of clogging equipment

Pending Publication Date: 2021-04-13
南通第六元素材料科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Existing patents often aim at the feasibility of preparation, but do not study the preparation efficiency, nor do they propose to solve the problems of long preparation time, low purification efficiency and high content of metal elements in the actual production process
In conventional preparation, the graphene oxide or graphite oxide containing metal impurities after the reaction is directly put into the purification section of washing, which requires a large amount of washing liquid and a long purification time to remove the metal impurities in the product. The lotion needs to be treated, and the treatment of waste water and waste liquid requires high costs and long purification time.

Method used

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  • Preparation method and equipment of graphene oxide or graphite oxide
  • Preparation method and equipment of graphene oxide or graphite oxide
  • Preparation method and equipment of graphene oxide or graphite oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] see image 3 , this example shows a preferred embodiment of the apparatus for producing graphene oxide or graphite oxide according to the present invention. The equipment comprises a reactor 1, a first transfer device 10, a purifier 2, a second transfer device 20, a first purifier 11, a third transfer device 30, a first collector 12 and a fourth transfer device 40,

[0068] Wherein, the first transfer device 10 is arranged between the reactor 1 and the purifier 2, and is connected with the reactor and the purifier, and is used to send all the products discharged from the reactor into the purifier; the second transfer device 20 is arranged at Between the purifier 2 and the first purifier 11, and connected with the purifier 2 and the first purifier 11, for separating graphene oxide or graphite oxide slurry in the purifier 2 into the first purifier 11; The third transfer device 30 is arranged between the first purifier 11 and the first collector 12, and is used to send th...

Embodiment 2

[0074] see Figure 4 , this example shows a preferred embodiment of the apparatus for producing graphene oxide or graphite oxide according to the present invention. The structure of each device is the same, the difference lies in the combination of each device in the equipment. Such as Figure 4 As shown, the equipment shown in this embodiment includes: a reactor 1, a first transfer device 10, a purifier 2, a second transfer device 20, a first purifier 11, a third transfer device 30, a first collector 12, a second transfer device Four transfer device 40, second purifier 13, fifth transfer device 50, second collector 14, sixth transfer device 60, third purifier 15, seventh transfer device 70, third collector 16, eighth transfer device 80 and the fourth purifier 17.

[0075] Wherein, the first transfer device 10 is arranged between the reactor 1 and the purifier 2, and is connected with the reactor and the purifier, and is used to send all the products discharged from the rea...

Embodiment 3

[0077] A kind of preparation method of graphene oxide or graphite, adopt the equipment shown in embodiment 1, be specially:

[0078] First add 98wt% concentrated sulfuric acid in the reactor, graphite and potassium permanganate are added to reactor 1 in turn, graphite, potassium permanganate: 98wt% concentrated sulfuric acid is prepared according to 1g:4g:30mL;

[0079] After adding concentrated sulfuric acid, graphite and potassium permanganate, the temperature of reactor 1 was raised to 40°C, and the reaction was continued for 5 hours;

[0080] After the reaction time is up, adjust the reaction temperature to 85°C by adding water, and continue the reaction for 5h;

[0081] The reacted material passes through image 3 equipment, in configuration 5 for 5 washes.

[0082] Specifically, the method for preparing graphene oxide includes: using the equipment described in Example 1 to produce according to the following process:

[0083] 1) Put concentrated sulfuric acid, graphite...

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Abstract

The invention discloses a preparation method of graphene oxide or graphite oxide. The method comprises the following steps: S1, sequentially adding concentrated sulfuric acid, graphite, potassium permanganate and water into a reaction kettle, and controlling the reaction temperature and reaction time under the stirring condition to obtain graphene oxide or graphite oxide slurry, wherein salt in the graphene oxide or graphite oxide slurry forms a supersaturated state; S2, purifying the graphene oxide or graphite oxide slurry obtained in the step S1, and separating to remove salt particles; S3, purifying the material obtained in the step S2 to obtain a cake material, a dry material or a slurry-state material with high solid content; S4, mixing and dispersing the cake material, the dry material or the slurry-state material obtained in the step S3 with water to form slurry or a solution-state material with low solid content; S5, purifying the slurry or solution-state material obtained in the step S4 again to obtain a cake material, a dry material or a slurry- state material with high solid content again; and S6, repeatedly executing the step S4 and the step S5 for multiple times.

Description

technical field [0001] The invention belongs to the field of graphene, and relates to a preparation method and equipment for improving the production efficiency of graphene oxide or graphite oxide. Background technique [0002] So far, there are three main methods for preparing graphene oxide: Brodie method, Staudenmaier method and Hummers method. Among the three methods, the Hummers method is more prominent in terms of timeliness, safety, and stability in the preparation of graphite oxide, and it is also the method adopted for industrialized large-scale preparation of graphite oxide. The preparation principle of the Hummers method: intercalate and oxidize graphite (powder or microflakes) through the strong oxide formed by concentrated sulfuric acid and potassium permanganate, and then oxidize and peel off the graphite oxide through hydration reaction, and then undergo several times After washing and purification, graphite oxide containing C and O functional groups such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198C01B32/23
CPCC01B32/198C01B32/23
Inventor 王炳霁殷松森张婧葛明唐润理瞿研
Owner 南通第六元素材料科技有限公司
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