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Spherical formed active carbon and method for preparing same

A technology for forming activated carbon and activated carbon, which is used in the field of environmental purification and pollutant treatment to achieve the effects of high strength, good wear resistance and high compressive strength

Inactive Publication Date: 2009-09-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem: The present invention aims at the above-mentioned problems in the application of activated carbon and the preparation of shaped activated carbon, and provides a spherical shaped activated carbon and its preparation method to overcome the shortcomings of existing activated carbon products and provide activated carbon with better adsorption and desorption properties product

Method used

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  • Spherical formed active carbon and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Weigh 75% of powdered activated carbon, 10% of bentonite, and 15% of attapulgite according to mass percentage, and mix them evenly.

[0018] (2) Silica sol solution is prepared according to the fact that silica sol accounts for 5% of the total mass of the powdery material, and the mass concentration of silicon dioxide in the silica sol is 15%.

[0019] (3) Add the silica sol solution to the powdery material mixture, mix evenly to make a soft material, extrude it into a smooth and dense strip with a diameter of 6 mm in diameter, and then cut it into sections with a length of 4 mm. The material is placed in a spheronizer and rolled into balls, and the extrusion-spheronization process is used to make balls to obtain spherical particles with a diameter of φ5mm.

[0020] (4) The spherical particles are dried and calcined at 360° C. for 60 minutes to obtain spherical activated carbon.

Embodiment 2

[0022] (1) Weigh 30% of powdered activated carbon, 30% of bentonite and 40% of attapulgite according to mass percentage, and mix them evenly.

[0023] (2) Prepare a silica sol solution according to the silica sol accounting for 15% of the total mass of the powdery material, and the mass concentration of silicon dioxide in the silica sol is 25%.

[0024] (3) Add the silica sol solution to the powdery material mixture, mix evenly to make a soft material, extrude it into a smooth and dense strip with a diameter of φ12mm, and then cut it into sections according to the length of 8mm. The finished material is placed in a spheronizer and rolled into balls, and the extrusion-spheronization process is used to make balls to obtain spherical particles with a diameter of φ12mm.

[0025] (4) Drying the spherical particles and calcining them at 400° C. for 30 minutes to obtain spherical shaped activated carbon.

Embodiment 3

[0027] (1) Weigh 50% of powdered activated carbon, 10% of bentonite, and 40% of attapulgite according to mass percentage, and mix them evenly.

[0028] (2) Prepare a silica sol solution according to the silica sol accounting for 10% of the total mass of the powdery material, and the mass concentration of silicon dioxide in the silica sol is 40% to 50%.

[0029] (3) Add the silica sol solution into the powdery material mixture, mix evenly to make a soft material, extrude it into a smooth and dense strip with a diameter of φ9mm, and then cut it into sections according to the length of 6mm. The finished material is placed in a spheronizer and rolled into balls, and the extrusion-spheronization process is used to make balls to obtain spherical particles with a diameter of φ9mm.

[0030] (4) The spherical particles are dried and calcined at 320° C. for 150 minutes to obtain spherical activated carbon.

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Abstract

The invention relates to a spherical formed active carbon and a method for preparing the same. The formed active carbon consists of inorganic binder silica sol and powdered materials of active carbon, attapulgite and bentonite, and the powdered materials comprise the following components in percentage by mass: 30 to 80 percent of the active carbon, 10 to 60 percent of the bentonite and 10 to 60 percent of the attapulgite; and the inorganic binder silica sol accounts for 4 to 15 percent of the total mass of the powdered materials, and the mass concentration of silicon dioxide in the silica sol is between 15 and 50 percent. The spherical formed active carbon is prepared by adopting the inorganic binder, has the advantages of high compressive strength, good pressure resistance and abrasion resistance, and can prevent active carbon chippings and dust from falling off; the inorganic binder dose not have water-solubility any more after solidification and cannot be softened by water so as to still keep higher strength; and the active carbon has the advantages of spherical appearance, smooth surface, good abrasion resistance, high packing density, even particle distribution and pore space, and small fluid flow resistance, and is advantageous for controlling parameters of the fluid thereof, and the like.

Description

1. Technical field [0001] The invention relates to the fields of environmental purification and pollutant treatment, in particular to a spherical activated carbon and a preparation method thereof. 2. Background technology [0002] Activated carbon has a large specific surface area, strong adsorption capacity and good chemical stability, and is widely used in food, medicine, chemical industry, environmental protection and other fields. In environmental engineering, it can be applied in water purification and air purification. Powdered activated carbon is a kind of carbonaceous adsorbent commonly used in industry, but due to its large volume and small bulk density, its mass adsorption capacity is relatively large, but its volumetric adsorption capacity is small, and powdered activated carbon is difficult to purify water. Separation, easy loss, difficult recovery; when used for air purification, it is easy to generate dust, so its application is greatly limited. Making powder...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 董寅生吴玉玲郭超盛晓波储成林林萍华
Owner SOUTHEAST UNIV
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