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Environment-friendly regenerated activated carbon production process

A kind of activated carbon production, activated carbon technology, applied in the direction of inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of large loss of activated carbon, high cost consumption, reduced adsorption capacity of activated carbon, etc., to achieve low energy consumption, clean and environmentally friendly process, cycle time short effect

Active Publication Date: 2021-03-09
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 processing

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

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Abstract

The invention provides an environment-friendly regenerated activated carbon production process, and belongs to the technical field of activated carbon recovery. The production process comprises the following steps: carrying out micro-oxidation on the surface of hot air, grinding, carrying out vacuum extraction, sequentially carrying out immersion cleaning with an acid-base solution to obtain a recovered material, heating the recovered material, quickly immersing in low-temperature liquid nitrogen, loading potassium ferrate, carrying out high-temperature activation, then mixing with weakly viscous pulverized coal, pressing, molding, and carrying out secondary activation to obtain activated carbon. According to the method, adsorbate on the activated carbon is separated and desorbed through grinding refining and vacuum extraction, low-temperature liquid nitrogen and pore channel loaded potassium ferrate are decomposed to recover a pore structure of the activated carbon, recycling of the waste activated carbon is achieved, and the process has important significance on 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 Applications(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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