Method for preparing activated carbon by taking coconut shells as raw materials

A technology for preparing activated carbon and coconut shells, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as insufficient activated carbon performance, and achieve the effect of good adsorption performance and high specific surface area

Inactive Publication Date: 2019-01-22
JINGZHOU HUARONG ACTIVATED CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of existing activated carbon is not good enough

Method used

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  • Method for preparing activated carbon by taking coconut shells as raw materials

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Embodiment 1

[0039] In the present embodiment, the method for preparing gac from coconut shell comprises the steps:

[0040] S1, the mixing of raw materials: choose coconut shell, pulverize, obtain coconut shell powder; Dry described coconut shell powder to water content rate 18%; Select concentration to be the thermal food grade phosphoric acid of 64%-, according to coconut shell powder: Thermal food-grade phosphoric acid = 1:1.5 for mixing, kneading and stirring evenly, and static soaking for 40 minutes to obtain a mixed material;

[0041] S2. High-temperature carbonization: take the mixed material obtained in step S1 and place it in a muffle furnace for carbonization treatment to obtain a carbonized material; wherein, the carbonization temperature is 270° C., and the carbonization time is 40 minutes;

[0042] S3. Activation: take the carbonized material obtained in step S2, and activate it to obtain the activated material; wherein, the activation temperature is 510° C., and the activati...

Embodiment 2

[0050] In the present embodiment, the method for preparing gac from coconut shell comprises the steps:

[0051]S1, the mixing of raw materials: select coconut shell, pulverize, obtain coconut shell powder; Dry described coconut shell powder to moisture content 24%; Select the thermal method food-grade phosphoric acid that concentration is 78% for use, according to coconut shell powder: heat French food-grade phosphoric acid = 1:1.9 ratio for mixing, kneading and stirring evenly and static soaking for 55min to obtain the mixed material;

[0052] S2. High-temperature carbonization: take the mixed material obtained in step S1 and place it in a muffle furnace for carbonization treatment to obtain a carbonized material; wherein, the carbonization temperature is 335° C., and the carbonization time is 55 minutes;

[0053] S3. Activation: take the carbonized material obtained in step S2, and activate it to obtain the activated material; wherein, the activation temperature is 560° C., ...

Embodiment 3

[0061] In the present embodiment, the method for preparing gac from coconut shell comprises the steps:

[0062] S1, the mixing of raw materials: select coconut shell, pulverize, obtain coconut shell powder; Dry described coconut shell powder to water content rate 21%; Select the thermal method food grade phosphoric acid that concentration is 70% for use, according to coconut shell powder: heat French food-grade phosphoric acid = 1:1.7 ratio for mixing, kneading and stirring evenly and static soaking for 48min to obtain the mixed material;

[0063] S2. High-temperature carbonization: the mixed material obtained in step S1 is placed in a muffle furnace for carbonization treatment to obtain a carbonized material; wherein, the carbonization temperature is 300° C., and the carbonization time is 50 minutes;

[0064] S3. Activation: take the carbonized material obtained in step S2, and activate it to obtain the activated material; wherein, the activation temperature is 530° C., and t...

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Abstract

The invention discloses a method for preparing activated carbon by taking coconut shells as raw materials. The method comprises the following steps: S1, mixing of the raw materials; S2, high-temperature carbonization; S3, activation; S4, rinsing and airing: rinsing the activated materials obtained in S3, and drying the rinsed materials to obtain dried materials; S5, pulverizing; S6, mixing: mixingthe pulverized materials obtained in S5 with bentonite and water according to the following parts by weight: 100-125 parts of pulverized materials, 24-36 parts of bentonite and 18-24 parts of water,thereby obtaining mixture; S7, granulating: S8, secondary physical activation: putting the dried granules obtained in S7 into an external combustion type converter, raising the temperature until the production temperature in a hearth is 620-650 DEG C, and introducing high-temperature water vapor for secondary activation to obtain materials after secondary activation; and S9, cooling and sieving. The activated carbon prepared by the method disclosed by the invention is higher in specific surface area and better in adsorption performance.

Description

technical field [0001] The invention relates to the technical field of activated carbon processing, in particular to a method for preparing activated carbon from coconut shells. Background technique [0002] Activated carbon is black powder or block, granular, honeycomb amorphous carbon, and there are also regularly arranged crystalline carbon. In addition to carbon elements, activated carbon also contains two types of admixtures: one is chemically combined elements, mainly oxygen and hydrogen, these elements are left in the carbon due to incomplete carbonization, or in the activation process, foreign Non-carbon elements are chemically combined with the surface of activated carbon; another type of admixture is ash, which is the inorganic part of activated carbon, and ash in activated carbon is easy to cause secondary pollution. Activated carbon is a hydrophobic adsorbent prepared by high-temperature carbonization and activation from carbon-containing substances as raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/336C01B32/342
CPCC01B32/324C01B32/336C01B32/342
Inventor 聂伟袁志雄聂秋菊晏才文
Owner JINGZHOU HUARONG ACTIVATED CARBON CO LTD
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