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Process for preparing super activated carbon from nut shell carbon and waste liquid activation treatment method of process

A technology of activated carbon and nut shell carbon, applied in chemical instruments and methods, bicarbonate preparation, silicon oxide and other directions, can solve the problems of alkaline waste liquid pollution, complex process and high product cost

Active Publication Date: 2017-05-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, although the super activated carbon prepared by the existing chemical activation method has a high specific surface area, the process is complicated, the yield is low, and a large amount of expensive strong alkaline KOH is used as a raw material, resulting in a very high product cost. At the same time, the problem of alkaline waste liquid pollution during production and subsequent cleaning is also very serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Crushing 1 kg of coconut shell carbon to 20-100 meshes, followed by a pre-cleaning process, followed by a heat treatment process A at 550°C, and kept the activated carbon obtained for 30 minutes. After cooling, immerse 150 grams of concentration in the vacuum reactor and be 2% hydrogen peroxide aqueous solution;

[0035] (2) Heat the shell charcoal immersed in hydrogen peroxide to 600°C and keep it for 30 minutes, cool the product obtained by heat treatment B to 150°C, and immerse 1.5 kg of hydrated sodium hydroxide (NaOH·H 2 O) as an alkaline activator;

[0036] (3) heating the shell charcoal obtained in the process of (2) to 660° C. in a nitrogen atmosphere, and keeping the reaction for 80 minutes to obtain the shell charcoal activated by heat treatment C;

[0037] (4) adding 1200 grams of water to leach and separate the activated product obtained in step (3) at a temperature of 100° C. to obtain activated mother liquor A mainly containing sodium hydroxide;

[0...

Embodiment 2

[0044] (1) Crushing 1 kg of apricot shell carbon to 40-60 meshes, followed by a pre-cleaning process, followed by a heat treatment process A at 500°C, and kept the activated carbon obtained for 30 minutes. After cooling, immerse 100 gram concentrations in the vacuum reactor and be 1% potassium persulfate aqueous solution;

[0045] (2) Heat the apricot shell charcoal immersed in potassium persulfate to 600°C and keep it for 30 minutes, cool the product obtained by heat treatment B to 150°C, and immerse 2 kg of hydrated sodium hydroxide (NaOH·H 2 O) as an alkaline activator;

[0046] (3) Heating the apricot shell charcoal obtained in the process of (2) to 660°C in an argon atmosphere, and keeping the reaction for 80min to obtain the apricot shell charcoal activated by heat treatment C;

[0047] (4) adding 1200 grams of water to leach and separate the activated product obtained in step (3) at a temperature of 105° C. to obtain activated mother liquor A mainly containing sodium h...

Embodiment 3

[0054] (1) Break 2 kg of peach shell charcoal to 40-60 meshes, and then carry out the pre-cleaning process, then conduct the heat treatment A process at 500 ° C, and keep the activated carbon obtained for 40 minutes. After cooling, it is 1% nitric acid aqueous solution that immerses 100 gram concentration in vacuum reactor;

[0055] (2) Heat the peach shell charcoal immersed in dilute nitric acid to 650°C and keep it for 20 minutes, cool the product obtained by heat treatment B to 150°C, and immerse 4.5 kg of hydrated sodium hydroxide (NaOH 2H 2 O) as an alkaline activator;

[0056] (3) heating the peach shell charcoal obtained in (2) process to 600° C. in a nitrogen atmosphere, and keeping the reaction for 90 minutes to obtain the peach shell charcoal activated by heat treatment C;

[0057] (4) adding 1200 grams of water to leach and separate the activated product obtained in step (3) at a temperature of 105° C. to obtain activated mother liquor A mainly containing sodium hy...

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Abstract

The invention discloses a process for preparing super activated carbon from nut shell carbon and a waste liquid activation treatment method of the process, belonging to the field of biochemical engineering and energy materials. The process comprises the following steps: soaking nut shell carbon which is subjected to pre-washing and thermal treatment A into an oxidization substance in a vacuum reaction kettle; performing thermal treatment B on the nut shell carbon soaked into the oxidization substance, and soaking into an alkali aquo-complex activating agent in the vacuum reaction kettle; in inert gas or reductive atmosphere, heating the nut shell carbon to perform thermal treatment C so as to obtain activated nut shell carbon; adding water to leach and separate the activated nut shell carbon so as to obtain alkali activated mother liquor A and a solid; adding water into the solid for leaching again so as to obtain carbonate mother liquor B and activated carbon slurry; performing multi-stage washing and acidization treatment on the activated carbon slurry, washing with water, and separating so as to obtain a crude activated carbon product; and performing thermal treatment D of different stages on the crude activated carbon product, thereby obtaining an activated carbon product. The super activated carbon with high yield and good properties can be prepared, and meanwhile useful byproducts such as bicarbonate and hydrated silica can be prepared.

Description

technical field [0001] The invention provides a method for preparing super activated carbon from fruit shell charcoal, which belongs to the fields of biochemical industry and energy materials. Background technique [0002] Nutshell charcoal has a wide range of sources. As a by-product of bioprocessing, it is rich in raw materials, with a carbon content as high as 85-95%, high porosity, and low ash content. It is an ideal raw material for preparing super activated carbon. In addition, carrying out the finishing process of shell charcoal to supercapacitor materials can greatly increase the added value of agricultural and sideline products and improve the per capita income of local residents. Fruit shell carbon can be widely used in domestic water purification, catalyst carrier and harmful gas adsorption, among which the most interesting is the application of super activated carbon prepared from fruit shell carbon as an advanced energy storage material in supercapacitors and le...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324C01D7/10C01B33/12
CPCC01B33/12C01D7/10C01P2006/12
Inventor 潘军青程杰杨裕生
Owner BEIJING UNIV OF CHEM TECH
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