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Method for preparing active carbon material by using waste and old polyethylene glycol terephthalate

A polyethylene terephthalate, a technology for preparing activated carbon, applied in the direction of solid waste removal, etc., can solve the problems of use limitation, transparency and sanitation problems, low physical properties of recycled materials, etc.

Inactive Publication Date: 2011-02-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most extensive and reasonable treatment method for waste PET is direct recycling. However, due to the impact of impurities, thermal degradation, etc., the physical properties of recycled materials are low, and there are problems with transparency and sanitation, and the use is limited. Therefore, through chemical It is an effective way to realize its recycling by modification

Method used

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  • Method for preparing active carbon material by using waste and old polyethylene glycol terephthalate
  • Method for preparing active carbon material by using waste and old polyethylene glycol terephthalate
  • Method for preparing active carbon material by using waste and old polyethylene glycol terephthalate

Examples

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Embodiment 1

[0016] Rinse the waste PET with deionized water and put it in an oven at 40°C for 24 hours. The dried waste PET is crushed into 80 mesh powdered PET with a crusher. Take 1g waste PET powder and 4g K 2 CO 3 Grind and mix well in a mortar. Then put the uniformly mixed raw materials into a tubular heating furnace, under the protection of nitrogen at a flow rate of 100mL / min, heat to a carbonization temperature of 500℃ at a heating rate of 10℃ / min, and keep it for 120min; The heating rate is heated to the activation temperature of 800℃, and the activation time is 60min; after the activation is completed in N 2 Naturally cool to room temperature under protection. Finally, the sample after carbonization and activation is washed with 0.5mol / L hydrochloric acid solution for about 5 times, and then washed with deionized water for about 5 times. The washed product is placed in an oven at 120°C for 24 hours to obtain 0.246 g Dry activated carbon products.

[0017] According to the nation...

Embodiment 2

[0019] Rinse the waste PET with deionized water and put it in an oven at 40°C for 24 hours. The dried waste PET is crushed into 80 mesh powdered PET with a crusher. Weigh 4g of activator K 2 CO 3 Dissolve in 20ml of deionized water. After dissolving, add 1g of PET powder and mix thoroughly. After mixing, put it in an oven and bake at 90°C for 24 hours to obtain a solid mixture. Then put the uniformly mixed raw materials into a tubular heating furnace, under the protection of nitrogen at a flow rate of 100mL / min, heat to a carbonization temperature of 500℃ at a heating rate of 10℃ / min, and keep it for 120min; The heating rate is heated to the activation temperature of 800℃, and the activation time is 60min; after the activation is completed in N 2 Naturally cool to room temperature under protection. Finally, the carbonized and activated sample was washed with 0.5mol / L hydrochloric acid solution for about 5 times, and then washed with deionized water for about 5 times. The washe...

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Abstract

Polyethylene glycol terephthalate (PET) is plastic which is applied widely, the used waste PET is not rotted and difficult to degrade under the natural conditions and therefore causes serious environmental problems, however, the PET has environmental and economical dual benefit after being chemically modified and recycled. The process of preparing the active carbon from the waste PET is divided into carbonizing and activating two steps. The carbonizing process is mainly used for generating a carbon material by the raw material PET, and the activating process ensures that the carbon material is activated by an activating agent and that a duct structure is generated. In the carbonizing process, the temperature is 450 to 600 DEG C, the time is 90 to 150 minutes, and an alkali carbon ratio of 3-5: 1; and in the activating process, a chemical activation method is adopted, K2CO3 is used as the activating agent, the activating temperature is 750 to 850 DEG C, and the activating time is 45 to 75min. Through the treatment of the two processes, the active carbon with relatively high specific surface area and a relatively good aperture structure is prepared from the waste PET.

Description

technical field [0001] The invention relates to a method for preparing activated carbon materials by using PET waste plastics as raw materials, and belongs to the technical field of waste polymer recycling. Background technique [0002] Because of its excellent performance, it is widely used in the fields of beverage bottles, fibers, films, film substrates and electrical insulation materials. With the rapid development of the polyester industry, there is a sharp increase in polyester waste. If not Reasonable recycling will not only cause a huge waste of resources, but also cause serious environmental pollution. Due to the conventional landfilling, incineration, and direct thermal cracking of waste plastics, there are certain problems. [0003] At present, the most extensive and reasonable treatment method for waste PET is direct recycling. However, due to the impact of impurities, thermal degradation, etc., the physical properties of recycled materials are low, and there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C01B31/12
Inventor 陈晋阳阮如意李志张杰刘桂洋
Owner SHANGHAI UNIV
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