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Preparation method of ultralow ash content activated carbon

An activated carbon and ash content technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of large corrosion area, large contact area between activator and container, and pollution of activated carbon finished products, and achieve simple preparation process and high ash content Low content, resource saving effect

Inactive Publication Date: 2019-03-15
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing techniques such as patent CN108190889A, patent CN108373155A, etc. are to mix the carbonized material with the activator and put them in the living container, which makes the contact area between the activator and the container large, and the corrosion area is also large, causing pollution to the finished activated carbon.

Method used

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  • Preparation method of ultralow ash content activated carbon

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preparation example Construction

[0029] like figure 1 As shown, a preparation method of ultra-low ash activated carbon, the steps of the preparation process include:

[0030] 1) The biomass raw materials are cleaned, carbonized at high temperature (500 ° C ~ 700 ° C), crushed, and screened; wherein, the biomass raw materials used are agricultural by-products, preferably corn cob, corn stalk, rice husk, rice straw, and wheat stalk. one or a combination of these;

[0031] 2) Add a certain amount of synthetic resin to the carbon compound obtained in step 1), wherein the amount of synthetic resin added is 5%-50% of the total amount of carbon compound and synthetic resin obtained after screening; the synthetic resin is a thermosetting resin or thermoplastic resin; further, the thermosetting resin is one or more mixtures of phenolic resin, urea-formaldehyde resin, melamine-formaldehyde resin, epoxy resin; thermoplastic resin is polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP)) one...

Embodiment 1

[0036] Using corncob as raw material, clean the corncob, put it into a corundum crucible, use calcined petroleum coke as a covering material, fill the corundum crucible around it, put it into a high temperature resistant container, and put it in a high temperature furnace at a temperature of 550 ℃ under carbonization. After cooling, crush and sieve, select 100-200 mesh size, add 5% phenolic resin, and mix evenly. Mix the above mixture with potassium hydroxide (mass ratio 1:3) and mix evenly, and make a cylindrical block with a Φ10mm large hole in the middle by molding, put it into a nickel crucible, close the lid, and use calcined pitch coke as The coating material is filled around the nickel crucible, placed in a high temperature-resistant container, and activated in a heating furnace at a temperature of 800°C. The activated product is washed, purified, dried, crushed and screened to obtain activated carbon material with an ash content of 0.58%.

Embodiment 2

[0038] Using corn stalks as raw materials, clean the corn stalks and put them into a corundum crucible, use calcined petroleum coke as a covering material, fill the corundum crucible around it, and put it into a high-temperature-resistant container. Carbonized. After cooling, crush and sieve, select 100-200 mesh size, add 20% polyethylene, and mix evenly. Mix the above mixture with potassium hydroxide (mass ratio 1:3) and mix evenly, make a cylindrical block with a Φ25mm large hole in the middle by lamination method, put it into a nickel crucible, close the lid tightly, and use calcined pitch coke. The periphery of the nickel crucible was filled up for the covering material, placed in a high-temperature-resistant container, and activated at a temperature of 850°C in a high-temperature furnace. The activated product is washed, purified, dried, crushed and screened to obtain activated carbon material with an ash content of 0.33%.

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Abstract

The invention discloses a preparation method of ultralow ash content activated carbon. The preparation method comprises the following steps: carrying out washing, high temperature carbonization, crushing and screening on biomass raw materials; adding synthetic resin into a carbide obtained by screening; uniformly mixing the obtained carbide containing the synthetic resin with an activator; carrying out compression molding on the obtained mixture, putting the molded mixture into a container, putting the container into a heating furnace and activating under certain temperature conditions; and washing, purifying, drying, crushing and screening the obtained activator to obtain a finished product of activated carbon. The obtained activated carbon has the advantages of low ash content (smaller than 1 percent), good performance and capability of being used for environmental protection, energy storage, catalysis and other fields.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a preparation method of ultra-low ash activated carbon. Background technique [0002] Activated carbon is a porous carbonaceous material with a very developed pore structure and a huge specific surface area inside. The surface has surface functional groups with special functions such as oxygen and other elements. It is often used as catalyst, adsorption material and energy storage material. In food processing, chemical, pharmaceutical, military and other important fields. Activated carbon is easy to regenerate and reuse, and has received extensive attention in today's society. The sources of raw materials for the preparation of activated carbon are broadly divided into two categories: plants and minerals. Crop waste is mainly composed of hemicellulose, cellulose and lignin. It has loose texture, high carbon content, abundant resources and low price. It is a renewab...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324C01B32/318
CPCC01B32/318C01B32/324C01B32/348
Inventor 王芳平罗英涛张劲斌李晨阳杜娟
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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