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Method for preparing active carbon with high specific surface area by utilizing activated abandoned bakelite

A high specific surface area, activated carbon technology, applied in the field of resource recycling, can solve the problems of increasing the number of bakelite, secondary pollution, resource consumption, etc., and achieve the effects of reducing production costs, saving time, and saving consumption

Inactive Publication Date: 2015-06-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the amount of discarded bakelite is increasing day by day. If it cannot be recycled, it will not only pollute the environment, but also be a great waste of resources.
The traditional methods of recycling bakelite waste are landfill and incineration, which not only consume resources, but also cause secondary pollution

Method used

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  • Method for preparing active carbon with high specific surface area by utilizing activated abandoned bakelite
  • Method for preparing active carbon with high specific surface area by utilizing activated abandoned bakelite
  • Method for preparing active carbon with high specific surface area by utilizing activated abandoned bakelite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Firstly, the waste bakelite was crushed to a particle size of 500 meshes, and then KOH and waste bakelite were mixed in a solid state at a mass ratio of 2.0:1 and evenly loaded into a ceramic crucible and placed in a microwave high-temperature reaction furnace. Blow nitrogen into the furnace for 1.0 min to evacuate the air in the furnace, heat for 24 min under the condition of microwave power 5kW, and when the heating reaches 18 min, quickly inject water vapor for 3.0 min through the tube connected to the bottom of the ceramic crucible, and open it at the same time 100W ultrasonic generator, turn off the microwave device and ultrasonic generator after heating, remove the material to obtain the activated material and quickly transfer the activated material to a container with tap water, first wash with water, and recover the residual KOH activator; then use hydrochloric acid Pickling was carried out, and then the sample after pickling was rinsed with tap water to keep the...

Embodiment 2

[0032] Firstly, the waste bakelite was crushed to a particle size of 800 meshes, and then KOH and waste bakelite were mixed in a solid state at a mass ratio of 1.5:1 and evenly loaded into a ceramic crucible and placed in a microwave high-temperature reaction furnace; blown into the furnace for 1.5 min Nitrogen is used to evacuate the air in the furnace, and it is heated for 27 minutes under the condition of microwave power 8kW. Turn off the microwave device and the ultrasonic generator, remove the material to obtain the activated material and quickly transfer the activated material to a container with tap water, first wash it with water, and recover the residual KOH activator. Pickling was carried out with hydrochloric acid, and then the sample after pickling was rinsed with tap water to keep the pH value of the solution at 7, and dried at 105° C. for 2 hours to obtain activated carbon with a high specific surface area.

[0033] The iodine adsorption value of the high specific ...

Embodiment 3

[0035] Firstly, the waste bakelite was crushed to a particle size of 600 meshes, and then KOH and waste bakelite were mixed in a solid state at a mass ratio of 1.0:1 and evenly loaded into a ceramic crucible and placed in a microwave high-temperature reaction furnace. Blow nitrogen into the furnace for 2.0 minutes to evacuate the air in the furnace, heat for 30 minutes under the condition of microwave power of 10kW, and when the heating reaches 20 minutes, quickly pass in water vapor for 4.0 minutes through the tube connected to the bottom of the ceramic crucible, and open at the same time 300W ultrasonic generator, turn off the microwave device and ultrasonic generator after heating, remove the material to obtain the activated material and quickly transfer the activated material to a container filled with tap water, first wash with water, and recover the residual KOH activator. Then use hydrochloric acid to pickle, then rinse the sample after pickling with tap water, keep the ...

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Abstract

The invention discloses a method for preparing active carbon with high specific surface area by utilizing activated abandoned bakelite, and belongs to the field of recycling utilization of resources. The method comprises the following steps: crushing KOH and abandoned bakelite; uniformly mixing and putting into a microwave high-temperature reaction furnace; introducing nitrogen into the furnace and emptying air in the furnace; heating for a certain time by means of microwave; quickly blowing into water vapor from the bottom; opening an ultrasonic generator at the same time and heating to obtain an activated material; washing; recovering a residual KOH activating agent; performing acid washing by using hydrochloric acid and rinsing by using water; drying to obtain the active carbon with high specific surface area. According to the method, the production cost of the active carbon is reduced, the environmental pollution is reduced, and the wastes are turned into the treasures, so that comprehensive utilization of natural sources is realized; the method has good environment, energy source and social benefits; the active carbon with high specific surface area, high activation rate and high microporosity can be used as a precious metal catalyst and a catalyst carrier (palladium, ruthenium, rhodium and platinum) and is used for recycling the precious heavy metals.

Description

technical field [0001] The invention relates to a method for preparing activated carbon with a high specific surface area by activating waste bakelite, and belongs to the field of resource recycling. Background technique [0002] As a porous material with excellent performance, activated carbon is widely used in many industrial fields, such as gas / liquid phase separation / purification, wastewater treatment, catalyst carrier, supercapacitor, energy storage, etc. With the development of human society, activated carbon not only has a wider range of applications, but also an increasing demand. In addition, the market has higher and higher requirements for the quality of activated carbon itself. [0003] Bakelite, the scientific name of phenolic resin, was originally a colorless or yellowish-brown transparent substance, which is often colored in red, yellow, black, green, brown, blue and other colors in the market, and is in the form of particles and powders. Resistant to weak ac...

Claims

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Application Information

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IPC IPC(8): C01B31/12B09B3/00
Inventor 夏洪应程松张利波彭金辉王仕兴刘秉国许磊张声洲周朝金
Owner KUNMING UNIV OF SCI & TECH
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