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A kind of environmental protection regenerated activated carbon production process

A technology for activated carbon production and activated carbon, which is applied in the fields of carbon compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of unfavorable environment sustainable development, reduced adsorption capacity of activated carbon, complicated preparation process, etc., and achieves short cycle and reduced metal content. , the effect of restoring the pore structure

Active Publication Date: 2021-06-25
JIANGSU PURESTAR EP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, activated carbon is basically made of wood, coal or petroleum semi-finished products. The cost consumption is high and the preparation process is complicated, which is not conducive to the sustainable development of the environment. As the consumption of activated carbon increases, the waste activated carbon produced is also increasing. It is very necessary to recycle a large amount of waste coal-based activated carbon through regeneration to restore the adsorption capacity of coal-based activated carbon.
However, in addition to their own disadvantages, the traditional activated carbon regeneration methods also have some common defects, such as large loss of activated carbon during the regeneration process, obvious reduction in the adsorption capacity of activated carbon after regeneration, etc. Comprehensive utilization efficiency is of great significance

Method used

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Examples

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Effect test

preparation example Construction

[0065] Preferably, the preparation method of described modified filler comprises the following steps:

[0066] S1, modified bryophyte fiber

[0067] Wash the moss several times with clear water to remove surface soil impurities, dry the cleaned moss until the water content is less than 10%, weigh 1 part by weight of the dried moss, add 100 parts by weight of deionized water, add 1 part by weight 1 weight part of glacial acetic acid and 1 weight part of sodium sulfite, heated in a water bath at 75°C for 1 h under stirring, then added 1 weight part of glacial acetic acid and 1 weight part of sodium sulfite, continued stirring and heating for 1 h, and then added 1 weight part of glacial acetic acid and 1 weight part of sodium sulfite and stirring, filter out the precipitate, rinse with acetic acid solution, soak the precipitate in the mixed aqueous solution of hydrogen peroxide and acetic acid according to the liquid-to-solid ratio of 50ml / g, soak for 20-30min, and then transfer ...

Embodiment 1

[0076] A production process for environmentally friendly regenerated activated carbon, comprising the following steps:

[0077] S1, pre-processing

[0078] Clean the waste activated carbon recovered after impurity removal, dry with hot air and micro-oxidize the surface at the same time. The temperature of the hot air is 150°C, and the heat treatment time is 30-50min. The particle size is 200-300 mesh, put the recycled activated carbon obtained by grinding into a pressure-resistant container, pump air to the absolute pressure in the container to 300-500Pa, keep the pressure for 1-3h, take it out, and then add it to 1mol / L Soak in hydrochloric acid solution and 4mol / L sodium hydroxide solution to remove excess impurities, rinse with water, and dry multiple times with drying equipment to obtain recycled materials;

[0079] S2, multiple hole processing

[0080] Heat the reclaimed material to 180°C, keep warm until the temperature of the reclaimed material is stable, quickly imme...

Embodiment 2

[0098] A production process for environmentally friendly regenerated activated carbon, comprising the following steps:

[0099] S1, pre-processing

[0100] Clean the waste activated carbon recovered after impurity removal, dry with hot air and micro-oxidize the surface at the same time. The temperature of the hot air is 150°C, and the heat treatment time is 30-50min. The particle size is 200-300 mesh, put the recycled activated carbon obtained by grinding into a pressure-resistant container, pump air to the absolute pressure in the container to 300-500Pa, keep the pressure for 1-3h, take it out, and then add it to 1mol / L Soak in hydrochloric acid solution and 4mol / L sodium hydroxide solution to remove excess impurities, rinse with water, and dry multiple times with drying equipment to obtain recycled materials;

[0101] S2, multiple hole treatment

[0102] Heat the recycled material to 180°C, keep warm until the temperature of the recycled material is stable, quickly immerse...

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Abstract

The invention provides a production process of environmentally friendly regenerated activated carbon, which belongs to the technical field of activated carbon recovery, and comprises the following steps: hot air surface is micro-oxidized, then ground, vacuum extracted, and then sequentially soaked with acid and alkali solution to obtain recycled materials, and the The reclaimed material is quickly immersed in low-temperature liquid nitrogen after being heated, then loaded with potassium ferrate and activated at high temperature, then mixed with weakly viscous coal powder and pressed into shape, and the activated carbon is obtained after secondary activation; the present invention refines through grinding, vacuum Extraction is used to separate and desorb adsorbates on activated carbon, and low-temperature liquid nitrogen and pore-loaded potassium ferrate decompose to restore the pore structure of activated carbon and realize the reuse of waste activated carbon, which is of great significance to the comprehensive utilization efficiency of resources.

Description

technical field [0001] The invention relates to the technical field of activated carbon regeneration, in particular to an environmentally friendly production process for regenerated activated carbon. Background technique [0002] Activated carbon is one of the most important industrial adsorbents. Because of its hydrophobicity and developed pore structure and specific surface area, it is widely used in many fields such as chemical industry, petroleum, light industry, food, environmental protection, and national defense. The performance of activated carbon is mainly determined by its pore structure and surface chemical properties. It is generally believed that activated carbon rich in micropores has a strong advantage in adsorbing small and medium molecules of gas and liquid. However, with the manufacturing technology of activated carbon and As the performance continues to improve, the demand for activated carbon continues to increase. In the fields of upper and lower water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/36C01B32/354
CPCC01B32/354C01B32/36C01B32/382
Inventor 刘斌杨金杯裴亮
Owner JIANGSU PURESTAR EP TECH CO LTD
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