Method for preparing active carbon with high specific surface area from coal and waste and old plastics by microwave

A technology of waste plastic and high specific surface area, applied in the field of chemical industry activated carbon preparation, to achieve the effect of high specific surface area, shortening carbonization time and reducing production cost

Inactive Publication Date: 2010-06-16
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After investigation, there is no report of high specific surface area activated carbon prepared by microwave from coal and waste plastics at home and abroad.

Method used

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  • Method for preparing active carbon with high specific surface area from coal and waste and old plastics by microwave
  • Method for preparing active carbon with high specific surface area from coal and waste and old plastics by microwave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The silk charcoal component is manually stripped from the raw coal, and the stripped silk charcoal is crushed to about 0.05mm. Crush waste beverage bottles to about 0.5mm. Take 0.600g of silk charcoal powder, add 0.400g of waste beverage bottle powder and 3.000g of KOH activator, mix evenly, put it into a microwave oven (frequency 2450MHz), preheat it under the radiation of small microwave power (250W) for 1min, and then use Required power (450W) carbonization activation 5.5min. After the carbonized material is cooled, take it out, pour it into a container filled with dilute hydrochloric acid for washing, let it stand for 10 minutes, filter it, and wash it with distilled water until neutral. Activated carbon with high specific surface area can be obtained after drying and crushing. The prepared activated carbon has an iodine adsorption value of 1837 mg / g and a methylene blue adsorption value of 833.2 mg / g.

Embodiment 2

[0020] Crush the raw coal to about 0.05mm, put it in an oven, and oxidize it in air at 80-100°C for 5 days. Crush waste beverage bottles to about 0.5mm. Take 0.800g of oxidized coal powder, add 0.200g of waste beverage bottle powder and 3.000g of KOH activator, mix well, put it into a microwave oven (frequency 2450MHz), and carbonize and activate at power (450W) for 6.5min. After the carbonized material is cooled, take it out, pour it into a container filled with dilute hydrochloric acid for washing, let it stand for 10 minutes, filter it, and wash it with distilled water until neutral. Activated carbon with high specific surface area can be obtained after drying and crushing. The prepared activated carbon has an iodine adsorption value of 1664 mg / g and a methylene blue adsorption value of 814.9 mg / g.

Embodiment 3

[0022] Crush the raw coal to about 0.05mm, put it in an oven, and oxidize it in air at 80-100°C for 7 days. Crush waste beverage bottles to about 0.5mm. Take 0.600g of oxidized coal powder, add 0.400g of waste beverage bottle powder and 3.000g of KOH activator, mix well, put it into a microwave oven (frequency 2450MHz), and carbonize and activate at power (450W) for 6.5min. After the carbonized material is cooled, take it out, pour it into a container filled with dilute hydrochloric acid for washing, let it stand for 10 minutes, filter it, and wash it with distilled water until neutral. Activated carbon with high specific surface area can be obtained after drying and crushing. The prepared activated carbon has an iodine adsorption value of 1611 mg / g and a methylene blue adsorption value of 808.5 mg / g.

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Abstract

The invention relates to a novel method for preparing active carbon with high specific surface area from coal and waste and old plastics by microwave, which belongs to the technical field of preparation of active carbon. The method comprises the following steps of: separating different components in coal; carrying out pulverization and oxidization preprocessing on the obtained fusain and vitrinite component; mixing with different waste and old plastics in a certain proportion; adding certain amount of activating agent and uniformly mixing and then placing the mixture into a crucible; embedding the crucible into a ceramic container provided with a heat insulating material and placing the ceramic container into a microwave oven; preheating the ceramic container under the radiation of small microwave power and carrying out carbonized activation by needed power in certain time; cooling and washing by a proper amount of hydrochloric acid; drying and pulverizing to obtain the active carbon with high specific surface area. The preparation process is based on a microwave heating technology and is simple and quick; the active carbon prepared by the synergistic effect of the coal and the plastics has high adsorptive values of methylene blue and iodine and can be used for the treatment of wastewater; meanwhile, the white pollution is eliminated, and the application prospect is wide.

Description

technical field [0001] The invention is a new method for preparing high specific surface active carbon by microwave from coal and waste plastics, which belongs to the technical field of chemical industry active carbon preparation. Background technique [0002] Activated carbon is the most commonly used adsorbent at present. There are abundant sources of raw materials for preparing activated carbon. Petroleum, coal, wood, nut shells, resins, etc. can be used to prepare activated carbon powder. The raw materials are different, and the production process is also slightly different. The raw materials and preparation process determine the physical and chemical properties of activated carbon. Coal has become the preferred raw material for the preparation of activated carbon due to its abundant resources, low price, high carbon content, and developed pore structure. The activated carbon produced with coal as raw material has exceeded 2 / 3 of the total amount of activated carbon. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 杨志远
Owner XIAN UNIV OF SCI & TECH
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