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Method for preparing activated char from bamboo material

A technology for preparing activated carbon and raw materials, which is applied in the field of activated carbon, can solve problems such as uninvolved and undisclosed chemical methods, and achieve the effect of low impurity content

Inactive Publication Date: 2003-11-19
尤匡银
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although above-mentioned two kinds of methods relate to preparing activated carbon with bamboo, all do not disclose to use chemical method, especially do not relate to the method that handles with hydrogen peroxide

Method used

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  • Method for preparing activated char from bamboo material
  • Method for preparing activated char from bamboo material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Select 10 tons of bamboo product residues, cut them into 0.5cm×10cm, screen out the debris, and obtain 9.5 tons of 0.5cm×10cm materials. Put the screened materials into the vertical carbonization furnace, feed 500kg each time, discharge once every hour, and feed while discharging.

[0045] (2) Carry out low-temperature dry distillation carbonization of bamboo raw materials in a carbonization furnace, and the dry distillation carbonization temperature is 450 ° C; after carbonization, it took about 20 hours to obtain 2.80 tons of carbonized materials, and measured technical parameters: volatile matter 23.80%, ash content 1.80 %, moisture 2.60%, fixed carbon 71.80%.

[0046] (3) In the presence of trace oxygen, put the carbonized carbonized material into the activation furnace, and activate it with superheated steam at high temperature. The activation temperature is 765°C; the activation time is 7 hours, and 2.8 tons of carbonized material are used together. 14 hours ...

Embodiment 2

[0051]Bamboo chips are screened and dried until the water content is less than 30%. 1 ton of the treated bamboo chips is obtained, impregnated with a mixed solution of zinc chloride and hydrogen peroxide, added with 15 kg of hydrogen peroxide and 95 kg of zinc chloride, and soaked for 10 hours.

[0052] Put the impregnated bamboo chips into a flat furnace, the temperature is controlled at 320°C, carbonized for 60 minutes, then heated up to 460°C, and activated for 150 minutes. After the activation is completed, the material is discharged, and then the activated material is put into the recovery tank, and the residual zinc chloride in the activated material is dissolved by adding water to recover the zinc chloride until the activated material in the pool does not contain zinc chloride.

[0053] Move the recovered activated material into the rinsing tank, rinse it with hot water for six times, then dry it and grind it. Get bamboo powdery activated carbon 295kg, obtain following ...

Embodiment 3

[0055] Bamboo chips are screened and dried until the water content is less than 30%. 1 ton of the treated bamboo chips is obtained, impregnated with a mixture of phosphoric acid and hydrogen peroxide, and soaked for 12 hours by adding 20 kg of hydrogen peroxide and 80 kg of phosphoric acid.

[0056] Put the impregnated bamboo shavings into a flat furnace, control the temperature at 320°C, carbonize for 60 minutes, then raise the temperature to 460°C, and activate for 210 minutes. After the activation is completed, the material is discharged, and then the activated material is put into the recovery tank, and the residual phosphoric acid in the activated material is heated to dissolve, so as to recover the phosphoric acid until the activated material in the pool does not contain phosphoric acid.

[0057] Move the recovered activated material into the rinsing tank, rinse it with hot water for six times, then dry it and grind it. Get bamboo powdery gac 210kg, get following technic...

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Abstract

The method for preparing active carbon from bamboo raw material includes the following steps: (1). mao bamboo and waste produced by making bamboo wares are used as raw material, through cutting and screening, and screening bamboo scraps or screening bamboo scraps and making them form; (2). low temp. pyrogenic distillation carbonization of bamboo raw material in carbonization furnace, its pyrogenic distrillation carbonization temp. is 200-600 deg.C; (3). in the presence of micro oxygen placing the carbonized bamboo raw material into activating furnace and making activation by using superheated steam at high-temp., activating temp. is 400-850 deg.c; and (4) breaking or water washing activated active carbon, drying, sorting and sieving to obtain the invented product. Before carbonization the bamboo raw material can be soaked in mixed solution formed from zinc chloride and hydrogen peroxide or mixed solution formed from phosphoric acid and hydrogen peroxide. Its product not only possesses the advantages of all the wooden active carbons, but also its methylthionine chloride decolouring power can be raised by 20%.

Description

technical field [0001] The invention belongs to the field of activated carbon, in particular to a method for preparing activated carbon from bamboo raw materials. Background technique [0002] Activated carbon has stable chemical properties and can regenerate many chemical agents. It is widely used in petroleum, medicine, chemical industry, food, national defense industry, environmental protection and other fields. According to statistics, the annual output of activated carbon in the country is about 120,000 tons. There are various raw materials for manufacturing activated carbon, such as wood, coal, and fruit shells. Compared with it, it has four unique advantages: large total pore volume, large specific surface area, high reactivity, and less impurities. However, the production of activated carbon at the expense of forest resources cannot meet the needs of social development. [0003] With the improvement of the whole society's awareness of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08C01B31/12C01B32/336
Inventor 王树东丁兴萃郑兴福尤匡银朱爱贞
Owner 尤匡银
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