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Super active carbon preparation method

A kind of activated carbon and super technology, which is applied in the field of chemical production, can solve the problems of long process time and poor adsorption performance of activated carbon, and achieve the effect of high bulk density, compact internal structure and easy control of process conditions

Inactive Publication Date: 2007-09-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process also has the disadvantages of long process time and poor adsorption performance of activated carbon

Method used

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  • Super active carbon preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Crush coconut shells and walnut shells to 2-3 mm, and carbonize them at a microwave power of 700W and a carbonization temperature of 600°C for 10 minutes to obtain coconut shell carbonized materials. Grind the prepared carbonized materials to 71 μm and mix them with KOH solids as carbonized materials / potassium hydroxide After the mass ratio is 1:3 and fully mixed, place it in a microwave oven and activate it for 25 minutes at a microwave power of 700W and an activation temperature of 700°C. Rinse with distilled water until the pH value reaches 6.0, and dry at 120°C for 2 hours to obtain the finished activated carbon.

[0024] The test conditions and test results are shown in Table 1:

[0025] Test conditions

Embodiment 2

[0027] Crush the coconut shell to 3-5mm, and carbonize it for 10 minutes at a microwave power of 700W and a carbonization temperature of 600°C to obtain a coconut shell carbonized material. Grind the prepared carbonized material to 120 μm and mix it with KOH solid according to the carbonized material / potassium hydroxide mass ratio of 1 : 6 is fully mixed and placed in a microwave oven, at 1400W of microwave power, activated at 750°C of activation temperature for 15min, in the activation process nitrogen is passed on the surface of the material layer, and the concentration by weight is 3% hydrochloric acid pickling 5 times and then rinsed with distilled water to When the pH value reaches 5.5, dry at 120°C for 3 hours to obtain the finished activated carbon.

[0028] The test conditions and test results are shown in Table 2:

[0029] Test conditions

[0030] Example 3

[0031] Crush walnut shells to 2-3mm, carbonize at 700W microwave power, carbonization temperature ...

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Abstract

The invention relates to a preparation method for super active carbon. Wherein, carbonizing and breaking up the raw material of coco shell or walnut shell to predetermined particle size and mix evenly with solid potassium hydroxide; activating the mixture in microwave oven with nitrogen protection during the process to obtain activation material; clearing the material with muriatic acid and then distilled water for many times to neutrality and obtain the said product. The product with this method has strong adsorption property, high specific surface area and high adsorption value to iodine and methylene blue. The method is simple and convenient to control.

Description

1. Technical field [0001] The invention discloses a method for preparing super activated carbon, which belongs to the technical field of chemical production. 2. Background technology [0002] Activated carbon is a carbonaceous adsorption material with a highly developed pore structure and excellent adsorption performance. It has been widely used in many fields such as environmental protection, chemical industry, food processing, metallurgy, pharmaceutical refining, and military chemical protection. With the development of environmental and energy science and technology, the application of activated carbon continues to expand, such as electrodes for electric double layer capacitors, natural gas and hydrogen storage, catalyst carriers, gas separation and other fields. However, the adsorption capacity of ordinary activated carbon can no longer meet the above needs, so it is urgent to research and develop new activated carbon materials with high adsorption capacity or super adso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 彭金辉马祥元张利波朱艳丽张世敏郭胜惠夏洪应涂建华
Owner KUNMING UNIV OF SCI & TECH
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