Preparation method of granular activated carbon by chemical activation

A granular activated carbon, chemical activation technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effects of low cost, promotion of development, and simple preparation method

Inactive Publication Date: 2012-06-20
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The husks of camellia oleifera after drying and deseeding are mainly used as fuel or to produce xylose, furfural, etc., and there are still few ways to develop and utilize them.

Method used

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  • Preparation method of granular activated carbon by chemical activation
  • Preparation method of granular activated carbon by chemical activation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dry the camellia oleifera shell at 100°C, mix it with 50%wt phosphoric acid solution at a weight ratio of 1.5:1 and let it stand for 20 hours, then place the mixture in an oven for 2 hours at 110°C, and then recover Dry and harden the excess phosphoric acid solution in an oven at 230°C for 6 hours, and finally put it into an activation furnace for activation at 450°C for 45 minutes. Put it into an oven and bake it at 150°C until it reaches a constant weight, so that high-performance unshaped granular activated carbon can be produced. After testing: the iodine adsorption value reaches 1053 mg / g, the methylene blue adsorption value reaches 202 (13.5ml) mg / g, the granular carbon strength is greater than 90%, and the yield rate is 40%.

Embodiment 2

[0029] Dry the camellia oleifera shell at 100°C, mix the camellia oleifera shell with 70% phosphoric acid solution in a weight ratio of 2:1 and place it in an oven for 6 hours at 70°C, then recover the excess phosphoric acid solution and dry it in an oven at 230°C Dry and harden at ℃ for 6 hours, and finally put it into the activation furnace and activate it at 450℃ for 45min. Constant weight, high-performance unshaped granular activated carbon can be prepared. After testing: the iodine adsorption value reaches 970 mg / g, the methylene blue adsorption value reaches 187.5 (12.5ml) mg / g, the granular carbon strength is greater than 85%, and the yield rate is 37%.

Embodiment 3

[0031] Dry the camellia oleifera shell at 100°C, mix the camellia oleifera shell with 50% phosphoric acid solution in a weight ratio of 3:1 and place it in an oven for 10 hours at 70°C, then recover the excess phosphoric acid solution and dry it in an oven at 230 Dry and harden at ℃ for 6 hours, and finally put it into the activation furnace and activate it at 450℃ for 45min. Constant weight, high-performance unshaped granular activated carbon can be prepared. After testing: the iodine adsorption value reaches 940 mg / g, the methylene blue adsorption value reaches 225 (15ml) mg / g, the strength of granular carbon is greater than 90%, and the yield rate is 37%. Example 4 :

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Abstract

The invention discloses a preparation method of granular activated carbon by chemical activation, which uses Camellia oieifera shells as a raw material and adopts a phosphoric acid activation method. The preparation method comprises the following steps: mixing Camellia oieifera shells and a phosphoric acid solution, soaking at 60-90DEG C to allow sufficient swelling of Camellia oieifera shells and sufficient hydrolytic saccharification, drying, curing, activating, washing, and drying to obtain finished product, i.e. irregular granular activated carbon. The finished product has good properties which are embodied in more than or equal to 900mg / g of iodine sorption value, more than or equal to 187mg / g of methylene blue sorption value and more than 85% of granular carbon strength. The activated carbon can be widely used in the field of liquid-phase decolorization, gas-phase pollutant recovery, etc.

Description

technical field [0001] The invention relates to a method for preparing amorphous granular activated carbon, in particular to a method for preparing granular activated carbon by using camellia oleifera shell as raw material and adopting a chemical activation method. [0002] Background technique [0003] Activated carbon is a kind of material with developed pore structure, huge specific surface area and strong adsorption capacity prepared from carbonaceous materials such as wood, fruit shell and coal. It is widely used in environmental protection, national defense, chemical industry, food, medicine, textile and other fields. Applications are increasingly widespread. In recent years, the shortage of coal and sawdust resources has become increasingly serious. Therefore, it is an important task for the development of my country's and the world's activated carbon industry to continuously develop raw materials for activated carbon production, explore new process conditions, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12B09B3/00C01B32/342
Inventor 邓先伦刘晓敏朱光真王国栋
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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