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Method for preparing active carbon from licorice waste residue

A technology for preparing activated carbon and waste residues, which is used in the removal of solid wastes to reduce environmental pollution and broaden the source of raw materials.

Inactive Publication Date: 2015-02-04
NINGXIA MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, it has not been found to use licorice waste residue as raw material to prepare activated carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Preparation of activated carbon by activation of potassium hydroxide.

[0013] (1) Weigh 10g of crushed licorice waste residue raw material, add 100ml of saturated potassium hydroxide solution, stir well, and soak at room temperature for 24h;

[0014] (2) Put the impregnated material liquid into the muffle furnace, raise the temperature from room temperature to the activation temperature of 700 °C at a heating rate of 10 °C / min, and then activate at constant temperature for 60 min;

[0015] (3) Take the activated sample out of the muffle furnace, after cooling, pickle it with 0.1mol / L HCl solution, soak it for 30min, then wash it repeatedly with double distilled water until the pH value is in the neutral range;

[0016] (4) Put the washed sample into an electric blast drying oven at 110°C, dry for 12 hours, and weigh the product after cooling in the desiccator; keep it for later use.

Embodiment 2

[0017] Example 2: Preparation of activated carbon by phosphoric acid activation.

[0018] (1) Weigh 10g of crushed licorice waste residue raw material, add 120mL of 70% phosphoric acid solution, stir well, and soak in a water bath at 90°C for 24h;

[0019] (2) Put the impregnated material liquid into the muffle furnace, raise the temperature from room temperature to the activation temperature of 500 °C at a heating rate of 10 °C / min, and then activate at constant temperature for 90 min;

[0020] (3) Take the activated sample out of the muffle furnace, after cooling, wash it repeatedly with double distilled water to remove excess phosphoric acid until the pH value is in the neutral range;

[0021] (4) Put the washed sample into an electric blast drying oven at 110°C, dry for 12 hours, and weigh the product after cooling in the desiccator; keep it for later use.

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PUM

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Abstract

The invention discloses a method for preparing active carbon from licorice waste residue, belonging to the field of preparation of active carbon. According to the method, the licorice waste residue is used as a raw material, and the active carbon is prepared by adopting a chemical activation method under an appropriate process condition, wherein the appropriate process condition for preparing the active carbon is determined by controlling the influence of factors including the category and concentration of an active agent, a solid-liquid ratio, the activation time, the activation temperature and the like on the yield and adsorption performance of the active carbon. The method comprises the procedures of treating the licorice waste residue and activating with potassium hydroxide or phosphoric acid to obtain a finished product. The active carbon is prepared by adopting a potassium hydroxide or phosphoric acid activation method, so that Chinese medicinal residue can be transformed from low additional value to high additional value, environmental pollution is reduced, the raw material source for producing the active carbon is widened, and a new path is developed for recycling Chinese medicinal residue.

Description

technical field [0001] The invention belongs to the field of activated carbon preparation, in particular to a method for preparing activated carbon by utilizing licorice waste residue. Background technique [0002] Activated carbon is made of carbonaceous substances with black appearance, developed pore structure and huge specific surface area (generally 500 ~ 1500m 2 / g) is a kind of porous adsorption material containing graphite microcrystalline structure. This kind of adsorbent has strong adsorption capacity and high mechanical strength, stable chemical properties, acid resistance, alkali resistance, heat resistance, and water and organic The solvents are immiscible and easily regenerated. The development of traditional activated carbon is limited by factors such as raw material source and cost. In recent years, many researchers are trying to find a wide range of sources, economical and cheap raw materials to prepare activated carbon. It is more common to use agricultu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12B09B3/00
Inventor 冯宁川马春芳
Owner NINGXIA MEDICAL UNIV
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