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Method for preparing activated carbon from tree leaves

A technology for preparing activated carbon and leaves, which is applied in the field of preparation, can solve the problems of wood charcoal source shrinkage, activated carbon raw material limitation, etc., and achieve the effect of rich micropores, low cost and simple preparation method

Active Publication Date: 2013-12-18
苏州克拉克森活性炭有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Traditional activated carbon preparation mostly uses wood, coconut shells, fruit cores, etc. severely restricted

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0013] A kind of method utilizing leaf to prepare gac, comprises the following steps:

[0014] (1) Dried the discarded leaves at 110°C to remove water, then crushed to a particle size of 1-2mm, soaked in the soaking solution at a ratio of 1:3 by weight, heated to 90°C in a water bath, and kneaded at a high speed of 3000rpm 20min, suction filtration;

[0015] (2) Add 3% barium nitrate and 2% magnesium nitrate after dehydrating the leaf particles after the above activation treatment, and stir evenly; place in a carbonization furnace and heat up to 480°C at a heating rate of 15°C / min for carbonization. The time is 1h;

[0016] (3) Add the carbonized material into the nitric acid solution with a concentration of 15% in a weight ratio of 1-4, heat it in a water bath to 60°C, stir for 4 hours, filter it with suction, wash it, and then add it in a weight ratio of 1-3 In a sodium hydroxide solution with a concentration of 18%, heat to 70°C in a water bath, stir for...

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Abstract

The invention discloses a method for preparing activated carbon from tree leaves. The method comprises the following steps: after abandoned tree leaves are dried and crushed, fully impregnating the crushed tree leaves in impregnation liquid, and carrying out suction filtration; after tree leaf particles subjected to activating treatment are dehydrated, adding a right amount of barium nitrate and magnesium nitrate into the tree leaf particles, and uniformly mixing to obtain a mixture; placing the obtained mixture in a carbonizing furnace so as to carbonize the mixture through heating; carrying out treatment on the obtained carbonized material by sequentially using a salpeter solution and a sodium hydroxide solution, and then washing the carbonized material by using distilled water until the pH value of the carbonized material is 6.8-7.2; and after the washed carbonized material is boiled by using distilled water, washing the carbonized material, then drying the obtained product until the carbonized material is at a constant weight, carrying out microwave irradiation treatment on the obtained product under the protection of high-purity nitrogen, and cooling the obtained product to room temperature, thereby obtaining a finished product. The preparation method disclosed by the invention is simple, and low in cost, and belongs to the utilization of wastes; According to the method, the tree leaves are used for replacing timbers to prepare the activated carbon, therefore, the method has an important practical significance to the resource utilization of abandoned tree leaves and the protection of forests; the prepared activated carbon is rich in micropores, large in specific surface area, and high in adsorption capacity.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon from leaves. Background technique [0002] Traditional activated carbon preparation mostly uses wood, coconut shells, fruit stones, etc. as raw materials. Due to the country's ban on natural forest logging, the source of wood charcoal has shrunk, and the raw materials for preparing activated carbon are greatly limited. The waste leaves have a wide range of sources and are cheap, so they can be used instead of wood to prepare activated carbon and reduce the amount of wood used. Contents of the invention [0003] The object of the present invention is to provide a method for preparing activated carbon by using waste leaves with wide sources and low price, which is simple and easy to implement and low in cost. [0004] The technical scheme that the present invention adopts is as follows: [0005] A kind of method utilizing leaf t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B32/324C01B32/342C01B32/348
Inventor 李金洪
Owner 苏州克拉克森活性炭有限公司
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