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Production of activated carbon from dregs from longoze saponin production

A technology for preparing activated carbon and turmeric saponin, which is applied in the field of preparing activated carbon, can solve the problems of affecting product yield and quality, large amount of medicine required for impregnation, poor solution wettability, etc., and achieves strong ability to remove or separate certain substances, Effect of improving activation performance and improving surface chemical properties

Inactive Publication Date: 2006-11-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0006] 1. The main components of turmeric saponin production residue are cellulose and lignin, which are loose in volume, low in density and strong in water absorption; and the residue has been extracted with an organic solvent, and its wettability with the solution is also poor. Therefore, If impregnated with chemicals in the pretreatment, the amount of chemicals required is relatively large;
[0007] 2. The pyrolysis temperature of turmeric saponin production residue is low (about 300°C by thermogravimetric analysis). When the temperature is high and the carbonization time is long, the raw material is easy to ash, which affects the yield and quality of the product

Method used

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  • Production of activated carbon from dregs from longoze saponin production

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Embodiment Construction

[0023] The present invention uses turmeric saponin production residue to prepare the step of the method for gac comprising:

[0024] (1) Place the turmeric saponin production residue in a carbonization furnace, and carbonize at a temperature of 250-350°C for 0.5-1 hour;

[0025] (2) putting the product obtained in step (1) into ZnCl with a weight concentration of 20% to 60% 2 Soaked in the solution of 12~24 hours, the weight solid-liquid ratio of step (1) gained product and solution is 1: 1.5~3;

[0026] (3) Place it in an activation furnace, and activate it for 1-2 hours at a temperature of 500-600°C;

[0027] (4) Boil with about 20% sodium hydroxide for 20 minutes, then wash with water until the pH value is 7-8;

[0028] (5) Dried in a drying oven at 100-150°C to obtain a finished product.

[0029] The specific embodiments 1-5 of the method of the present invention are shown in Table 1.

[0030] Contrast process scheme 1,2 in table 1 is the disclosed method of Chinese pa...

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Abstract

A production of active carbon from longoza saponin residual is disclosed. It is carried out by: 1) putting longoza saponin residual into carbonizing furnace at temperature 250-350deg.C for 0.5-1 hr; 2) immersing in ZnCl2 solution with weight concentration 20%-60% for 12-24 hrs, and feed liquid ratio 1:1.5-3; 3) putting into activating furnace at temperature 500-600deg.C for 1-2 hrs; 4) alkali washing and water poaching; 5) drying and finishing. It achieves low cost and good activating performance.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon from plant residues produced in production activities. Background technique [0002] Activated carbon is a kind of porous carbonaceous material, and it is an adsorbent with a wide range of applications. It is acid-resistant, alkali-resistant, and can withstand water immersion, high temperature and high pressure, and can be regenerated after use. Its properties mainly depend on the raw material manufacturing process and post-processing method. [0003] The traditional industrial preparation is mainly based on hydrocarbons with high carbon content as raw materials, which are produced by high-temperature carbonization and activation. At present, the activated carbon raw materials for industrial production mainly come from wood charcoal, fruit shell charcoal, coal-based charcoal, petroleum-based charcoal, synthetic resin charcoal, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 张彩香王焰新鲍建国刘慧
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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