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A process for mixing activated carbon with hemp stalks and roots

A technology of hemp stalk and activated carbon, which is applied in the field of activated carbon preparation, can solve the problems of unsatisfactory adsorption effect, low activated carbon adsorption rate, single activated carbon application technology, etc. Effect

Inactive Publication Date: 2019-01-04
BEIJING FORESTRY UNIVERSITY
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AI Technical Summary

Problems solved by technology

At present, there is a lack of activated carbon application technology for different adsorption objects, and the application technology of activated carbon with corresponding materials is relatively simple.
Basically, a single material is used to prepare activated carbon, resulting in low adsorption rate of activated carbon and unsatisfactory adsorption effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The weight ratio of the raw materials used is: the weight ratio of the used raw materials is: 40 parts of tree roots, 40 parts of hemp stalks, and 15 parts of sodium polyphosphate. After peeling the hemp stalks and roots, saw them into small pieces with a radius of 2cm and a length of about 4cm, wash them with distilled water, and dry them at 105°C until the quality is constant; put them in a grinder and grind them until they can pass through 100 mesh Sieve to get powder. The powder is soaked in phosphoric acid with a concentration of 50% at a mass ratio of 2:1 for 16 hours; the soaked powder is added into a mixer, stirred and mixed evenly to prepare a mixture. Put the mixed material into a wood carbonization device, heat it to a temperature of 500° C. and keep it warm for 60 minutes, carry out dry distillation and carbonization, and then cool to room temperature to obtain the mixed material charcoal. Put the mixed material charcoal into a ball mill for b...

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Abstract

The invention aims to provide a preparation method for mixed active carbon. The mixed active carbon is prepared from China hemp stems and tree roots through activation, kneading and extrusion by using a one-step phosphoric acid activation method. Selection of active carbon made of corresponding materials according different adsorption objects has not been reported in current single active carbon application technology. Normally, active carbon is prepared from a single material in the prior art, which leads to low adsorption rate and poor adsorption effect of the active carbon. The active carbon prepared in the invention has a high specific surface area, a good dirt adsorption function and the advantages of firm shaping, usage of the waste, low pollution treatment cost, low carbon, energy conservation and good treatment effect.

Description

technical field [0001] The invention belongs to a preparation method of activated carbon. Background technique [0002] Activated carbon has become an extremely versatile adsorbent in industrial applications due to its huge specific surface area and rich pore structure, and is widely used in various domestic applications. By absorbing harmful substances from liquids and gases, activated carbon can remove odors in the air, impurities in drinking water, heavy metal ions, etc., and play a role in purification. Traditional activated carbon is made from coal, coke and wood products, but now these resources are in short supply and are mainly used in national pillar industries. Since the 21st century, the problem of resource scarcity has become increasingly prominent, making how to use environmentally friendly and renewable materials to prepare activated carbon has become a research hotspot. [0003] According to survey statistics, in 2010, the theoretical amount of straw resourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/342C01B32/324B09B3/00
Inventor 陈瑶高建民赵阳张骥
Owner BEIJING FORESTRY UNIVERSITY
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