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Spherical activated carbon loaded with metal iron, its preparation method and use

A technology of activated carbon adsorption and metal copper, applied in non-metallic elements, chemical instruments and methods, other chemical processes, etc., can solve the problems of insufficient adsorption capacity, limited application scope, high cost, etc., to reduce yield, application Wide range of effects with excellent adsorption properties

Active Publication Date: 2020-07-14
SHENZHEN GLOBAL GREENLAND NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to single performance, few derivative products, and complicated preparation process, its application range is limited, and its cost remains high.
[0005] Not only that, the adsorption performance of activated carbon prepared by the current process, especially the adsorption capacity for specific types of components, still needs to be improved, and because its surface contains a large number of unmodified groups, its adsorption capacity for certain types of substances Insufficient capacity, resulting in limited range of application

Method used

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  • Spherical activated carbon loaded with metal iron, its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] 1.1 Preparation of spherical polymer

[0076] Add 18 liters of water into a 50-liter polymerization kettle, heat it to 45°C, add 10g of magnesium carbonate, 20g of gelatin and 0.15g of methylene blue under stirring, and add 3kg of methylstyrene and 1kg of dipentamyl olefin and 20g of benzoyl peroxide mixed into the oil phase, then add 1.0kg of paraffin, close the polymerization kettle, feed clean compressed air into the polymerization kettle, and keep the gas phase pressure in the kettle at 0.02MPa. Then, turn on the stirring, adjust the liquid beads in the kettle to an appropriate particle size, raise the temperature to 80°C, keep the temperature for 12 hours, then raise the temperature to 100°C, keep the temperature for 20 hours, filter, wash, dry and sieve to obtain a particle size of 1.5mm~ 2.5mm spherical polymer 2.35kg.

[0077] 1.2 Sulfonation and carbonization

[0078] The spherical polymer obtained in step 1.1 with a mass ratio of 1:3 was mixed with concentra...

Embodiment 2

[0094] 1.1 The preparation of spherical polymer is the same as 1.1 in embodiment 1

[0095] 1.2 Sulfonation and carbonization

[0096] The spherical polymer obtained in step 1.1 with a mass ratio of 3:1 is mixed with concentrated sulfuric acid, and then the mixture is added to an acid-resistant rotary tube furnace. / min heating rate for the following sulfonation treatment:

[0097] Heat to 60°C and stay for 60 minutes;

[0098] Heat to 130°C and stay for 160 minutes;

[0099] Heat to 180°C and stay for 100 minutes;

[0100] The process can well realize the sulfonation treatment of spherical polymers;

[0101] Continue to heat up at a heating rate of 3°C / min, and carry out carbonization treatment in a mixed atmosphere with an oxygen volume percentage of 5%:

[0102] Heat to 550°C and stay for 360 minutes;

[0103] Heat to 850°C and hold for 240 minutes. Lower the temperature to obtain carbonized products.

[0104] 1.3 Lye treatment

[0105] Get 25g Potassium Hydroxide ...

Embodiment 3

[0112] 1.1 The preparation of spherical polymer is the same as 1.1 in embodiment 1

[0113] 1.2 Sulfonation and carbonization

[0114] The spherical polymer obtained in step 1.1 with a mass ratio of 1:1 is mixed with oleum, and then the mixture is added to an acid-resistant rotary tube furnace. ℃ / min heating rate for the following sulfonation treatment:

[0115] Heat to 60°C and stay for 60 minutes;

[0116] Heat to 140°C and stay for 160 minutes;

[0117] Heat to 160°C and stay for 100 minutes;

[0118] The process can well realize the sulfonation treatment of spherical polymers;

[0119] Continue to heat up at a heating rate of 5°C / min, and carry out carbonization treatment in a mixed atmosphere with an oxygen volume percentage of 5%:

[0120] Heat to 550°C and stay for 360 minutes;

[0121] Heat to 900°C and hold for 240 minutes. Lower the temperature to obtain carbonized products.

[0122] 1.3 Lye treatment

[0123] Get 25g Potassium Hydroxide and dissolve in dehy...

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Abstract

The invention provides spherical activated carbon loaded with a metal iron element as well as a preparation method and use thereof. The surface of the spherical activated carbon is loaded with the metal iron element, so that the spherical activated carbon has good adsorptive property and has excellent preferential adsorption properties to organic matters such as toluene as well as metal copper ions. By introducing a large amount of sulfonic acid groups or sulfuryl groups in a sulfonation step, the situation that the yield is decreased due to the collapse of a spherical polymer resulted from high temperature in a carbonation process can be prevented; and meanwhile, the spherical activated carbon can be completely or partially removed in a carbonation process, and the surface of the activated carbon can be modified, so that the content of acid groups on the surface of the activated carbon can be increased. The preparation method is simple and convenient, the raw material polymer can be pretreated by virtue of sulfuric acid before the carbonization step, or can be treated in situ in the carbonization process and is combined with alkaline liquid and an iron salt solution for use so asto realize the loading of the metal iron element, and the loading quantity can be adjusted and reaches up to 30wt%.

Description

technical field [0001] The invention relates to spherical activated carbon loaded with metal iron elements, its preparation method and application, and belongs to the technical field of activated carbon materials. Background technique [0002] Activated carbon is a hydrophobic adsorbent prepared by high-temperature carbonization and activation from carbon-containing substances as raw materials. Activated carbon contains a large number of pores and can have a large surface area, making it one of the most widely used adsorbents. At present, activated carbon is not only used to remove color and odor, but also to remove some organic pollutants and some inorganic substances in water, including some toxic heavy metals. [0003] Activated carbon is generally prepared by carbonization of suitable carbonaceous feedstocks followed by activation. The study found that the difference in raw materials may affect the properties of activated carbon products, such as their composition, por...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C02F1/28C01B32/318B01J20/30C02F101/20C02F101/32
CPCB01J20/06B01J20/20C01B32/318C02F1/283C02F2101/20C02F2101/322
Inventor 常明珠
Owner SHENZHEN GLOBAL GREENLAND NEW MATERIALS CO LTD