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Method for preparing activated carbon from pomelo peels, hemp stems and walnut shells

A technology for preparing activated carbon and grapefruit peel, applied in chemical instruments and methods, inorganic chemistry, other chemical processes, etc., can solve problems such as rational utilization of unfavorable agricultural and forestry wastes, single, uneven performance of activated carbon, etc., to achieve enhanced utilization efficiency, The effect of reducing manufacturing costs and improving performance

Active Publication Date: 2014-05-14
LIYANG TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing process is usually relatively simple in the selection of agricultural and forestry waste raw materials, so the performance of the prepared activated carbon is relatively uneven, which is not conducive to the rational utilization of agricultural and forestry waste.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Select grapefruit peel, hemp stems, and walnut shells and mix them in a weight ratio of 1:2:1, and dry them at 115 degrees Celsius for 18 hours.

[0017] (2) The mixture dried in step 1 is crushed to a particle size of about 1.8 mm to obtain raw material particles.

[0018] (3) The raw material particles in step 2 are uniformly mixed in a weight ratio of 1:2:1 with potassium hydroxide and potassium carbonate to obtain a mixture, and 50 degrees Celsius water equal to the weight of the mixture is added and immersed for 18 hours.

[0019] (4) Put the immersed material in step 3 into a microwave oven, and carbonize and activate it under 400W microwave irradiation power for 7 minutes.

[0020] (5) The activated material in step 4 is boiled at 85 degrees Celsius for 40 minutes with 1.5 moles of hydrochloric acid per liter, then rinsed in pure water for neutrality, and then dried at 130 degrees Celsius for 10 hours.

[0021] (6) Grind the dried raw materials in step 6, and use 160 m...

Embodiment 2

[0024] (1) Select grapefruit peel, hemp stems, and walnut shells and mix them in a weight ratio of 1:2:2, and dry them at 115 degrees Celsius for 18 hours.

[0025] (2) The mixture dried in step 1 is crushed to a particle size of about 1.6 mm to obtain raw material particles.

[0026] (3) The raw material particles in step 2 are uniformly mixed in a ratio of 1:2:2 by weight to potassium hydroxide and potassium carbonate to obtain a mixture, and 50 degrees Celsius water equal to the weight of the mixture is added, and immersed for 18 hours.

[0027] (4) Put the immersed material in step 3 into a microwave oven, and carbonize and activate it under the microwave irradiation power of 450W for 7 minutes.

[0028] (5) The activated material in step 4 is boiled at 85 degrees Celsius for 40 minutes with 1.5 moles of hydrochloric acid per liter, then rinsed in pure water for neutrality, and then dried at 130 degrees Celsius for 10 hours.

[0029] (6) Grind the dried raw materials in step 6, and ...

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Abstract

The invention provides a method for preparing activated carbon from pomelo peels, hemp stems and walnut shells. The method comprises the steps of selecting and mixing the pomelo peels, the hemp stems and the walnut shells in proportion, grinding the dried mixture to obtain the raw materials, mixing the granules of the raw materials with an activating agent uniformly to obtain a mixed material, adding water to soak the mixed material, putting the soaked material into a microwave oven to undergo carbonization activation, washing the material with acid and water and drying the material in sequence, grinding the dried raw material, sieving the powder by adopting sieves with different mesh numbers to obtain the activated carbon with three-level fineness, and mixing the activated carbon in proportion to form a final product. The activated carbon prepared by the method has good adsorption property and long service life.

Description

Technical field [0001] This application relates to a preparation method of activated carbon, in particular to a method of preparing activated carbon by using grapefruit peel, hemp stem and walnut shell. Background technique [0002] Because of its developed internal pore structure, activated carbon has become an extremely important adsorbent and is widely used in many fields such as water treatment, environmental protection, and agriculture. There are many raw materials for preparing activated carbon, including wood, chaff, crop straw and other plant materials, as well as coal, petroleum coke, rubber and so on. In today's energy crisis and increasingly serious environmental problems, the preparation of activated carbon from low-priced and abundant agricultural and forestry wastes has attracted more and more attention. However, the existing processes are usually relatively simple when selecting agricultural and forestry waste materials, so the performance of the prepared activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C01B31/08C01B32/324
Inventor 梅欣
Owner LIYANG TECH DEV CENT
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