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Micro-granularity coal-based activated carbon and preparation method thereof

A coal-based activated carbon and particle technology, which is applied in the field of medical materials, can solve the problems of poor penetration of the intestinal wall, difficulty reaching the pathogenic area, and difficulty in crushing activated carbon to a suitable particle size.

Inactive Publication Date: 2017-12-01
贺守印
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In clinical rescue work, the application of activated carbon is difficult to carry out, the main reason is that the activated carbon obtained in the prior art is not easily crushed to a suitable particle size
Usually, the fineness of activated carbon is 325 mesh (about 45 μm), the particles are large, and the intestinal wall penetration is poor, so it is difficult to reach the pathogenic area

Method used

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  • Micro-granularity coal-based activated carbon and preparation method thereof
  • Micro-granularity coal-based activated carbon and preparation method thereof

Examples

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preparation example Construction

[0021] The invention provides a kind of preparation method of coal-based activated carbon with fine particle size, comprising the following steps:

[0022] (1) Mixing the first coal type and the second coal type to obtain a mixed coal type; the ash content of the first coal type is <4wt.%, the volatile content is 31-36wt.%, and the caking index is 0.5-2.0; the ash content of the second coal type is <3wt.%, the volatile matter content is 28-30wt.%, and the caking index is 0.5-1.0;

[0023] (2) Carrying out briquetting, oxidation, carbonization and activation of the mixed coal in sequence to obtain an activation material;

[0024] (3) After the activated material is washed, it is graded and pulverized to obtain fine-sized coal-based activated carbon.

[0025] The present invention mixes the first coal type and the second coal type to obtain a mixed coal type; the ash content of the first coal type is <3wt.%, the volatile matter content is 31-36wt.%, and the caking index is 0.5 ...

Embodiment 1

[0061] (1) The first coal type (ash content is 3.3wt.%, volatile matter content is 35.1wt.%, caking index is 1.6) and the second coal type (ash content is 2.4wt.%, volatile matter content is 29.3wt.%, cohesion index is 0.8) is dried to moisture content 6wt.% respectively, the first coal type 90kg after described drying is mixed with the second coal type 10kg, obtains mixed coal type; m, long 12m in the converter, the pressure of the drying is 98kPa, the temperature is 350 ℃;

[0062] (2) Grinding the mixed coal type to obtain a powder material with a particle size of ≤45 μm, and then pressing the powder material into a block-shaped briquetting material, the pressure used for the briquetting is 28MPa, and the rotating speed is 35Hz. The strength of the block is 98%;

[0063] (3) Oxidize the briquette obtained in step (2) in flowing hot air with a temperature of 260° C. and a pressure of 0.058 MPa, and the oxidation time is 6.5 hours to obtain an oxidized briquette;

[0064] (...

Embodiment 2

[0077] (1) The first coal type (ash content is 3.5wt.%, volatile matter content is 33.9wt.%, caking index is 1.3) and the second coal type (ash content is 2.7wt.%, volatile matter content is 27.8wt.%, cohesive index is 0.7) dry to water content less than 6wt.% respectively, the first coal type 80kg after described drying and the second coal type 20kg are mixed, obtain mixed coal type; 1.0m, 12m long converter, the drying pressure is 97kPa, the temperature is 360 ℃;

[0078] (2) Grinding the mixed coal type to obtain a powder material with a particle size of ≤45 μm, and then pressing the powder material into a block-shaped briquetting material, the pressure used for the briquetting is 28MPa, and the rotating speed is 35Hz. The strength of the block is 97.8%;

[0079] (3) Oxidize the briquette obtained in step (2) in flowing hot air with a temperature of 260° C. and a pressure of 0.055 MPa, and the oxidation time is 6 hours to obtain an oxidized briquette;

[0080] (4) The oxi...

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Abstract

The invention provides a preparation method of micro-granularity coal-based activated carbon. The preparation method comprises the following steps: mixing a first type of coal with a second type of coal to obtain a mixed type of coal, wherein ash content of the first type of coal is less than 4wt.%, volatile content is 31-36wt.%, and viscosity index is 0.5-2.0; ash content of the second type of coal is less than 3wt.%, volatile content is 28-30wt.%, and viscosity index is 0.2-1.0; sequentially carrying out briquetting, oxidizing, carbonizing and activating on the mixed type of coal to obtain an activated material; and washing the activated material, and then carrying out hierarchical powder grinding, so that the micro-granularity coal-based activated carbon is obtained. The preparation method provided by the invention has the advantages that the particle size of the obtained coal-based activated carbon is less than 6.5 mu m, the average particle size is 3.75-5.5 mu m, and the specific surface area of the obtained coal-based activated carbon is 1043-1176m<2> / g; and meanwhile, the provided method is simple, easy to operate and applicable to industrial production.

Description

technical field [0001] The invention relates to the technical field of medical materials, in particular to a fine-sized coal-based activated carbon and a preparation method thereof. Background technique [0002] In recent years, coloring agents such as ink and melanin have been used to mark lymph nodes in tumor regions. The tropism and adhesion of ink are better than melanin, but the ink has larger particles and poor purity, so its clinical application is limited. . The use of activated carbon particles as a tumor area or lymph node staining marker has been widely used in gastric cancer, breast cancer, colon cancer and other cases. In addition, in the emergency rescue treatment of patients with severe acute oral poisoning, gastric lavage is an important rescue measure, and the rescue effect of gastric lavage with activated carbon suspension is better than that of simple water gastric lavage. Absorption of poisons, increase the clearance rate of poisons. [0003] In clinic...

Claims

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Application Information

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IPC IPC(8): C01B32/33C01B32/336A61K49/00
CPCA61K49/006A61K49/0091C01P2004/61C01P2006/12
Inventor 贺守印
Owner 贺守印
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