Improved process for preparing porous microsphere active carbon

A technology of porous microspheres and activated carbon, which is applied in the field of ultra-high-strength porous microsphere activated carbon, which can solve the problems of complex preparation process, low strength of spherical activated carbon, and difficulty in industrial production, and achieve high product strength, good fluidity and low impurity content Effect

Inactive Publication Date: 2007-06-27
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The method for preparing spherical activated carbon in the prior art is complicated in preparation process, and the strength of the prepared spherical activated carbon is low, so it is difficult to realize industrial production

Method used

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  • Improved process for preparing porous microsphere active carbon
  • Improved process for preparing porous microsphere active carbon
  • Improved process for preparing porous microsphere active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 300 g of thermosetting phenolic resin balls were oxidized at a temperature of 80° C. for 10 hours in an atmosphere with an oxygen content of 40% by volume. Subsequently, the product obtained above was raised to 800° C. at a rate of 1° C. / min in an inert atmosphere of nitrogen, and stayed at this temperature for 2 hours for carbonization treatment. Subsequently, at 800° C., an activation treatment was carried out in an activation atmosphere of water vapor for 0.5 hours, and the ultra-high-strength porous microsphere activated carbon was obtained. The strengths of the resulting activated carbons are listed in Table 1 below.

Embodiment 2

[0038]200 g of thermosetting acrylic resin balls were oxidized at a temperature of 150° C. for 4 hours in an atmosphere with an oxygen content of 30% by volume. The product obtained above was raised to 600° C. at a rate of 1° C. / min in an inert atmosphere of nitrogen, and stayed at this temperature for 3 hours for carbonization treatment. Subsequently, at 600° C., the activation treatment was carried out under the activation atmosphere of water vapor for 1 hour, and the ultra-high-strength porous microsphere activated carbon was obtained. The resulting activated carbon strengths are listed in Table 1 below.

Embodiment 3

[0040] 300 g of thermosetting methacrylic resin balls were oxidized with concentrated sulfuric acid at 80° C. for 10 hours. After drying at 120°C, the product obtained above was raised to 1000°C at a rate of 3°C / min in an inert atmosphere of nitrogen, and stayed at this temperature for 1 hour for carbonization. Subsequently, at 1000° C., an activation treatment is carried out under an activation atmosphere of water vapor for 0.5 hours to obtain ultra-high-strength porous microsphere activated carbon. The resulting activated carbon strengths are listed in Table 1 below.

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Abstract

The improved process for preparing high strength porous microsphere active carbon includes the following steps: oxidizing thermosetting resin ball at 60-400 deg.c in oxygen containing atmosphere or pre-treating thermosetting resin ball at 60-300 deg.c in oxidizing acid, SO2 or SO3; carbonizing at 600-1200 deg.c in helium, nitrogen or their mixture atmosphere; and activating at 600-1200 deg.c in activating water vapor atmosphere to obtain high strength porous microsphere active carbon with grain size of 10 micron to 2 mm, BET specific surface area of 500-4000 sq m/g, and grain strength of 50-200 MPa. The process is simple, low in cost and high in yield, and the prepared microsphere active carbon has high strength and high purity and is one excellent medical active adsorption material.

Description

technical field [0001] The invention relates to a high-strength porous microsphere activated carbon, in particular to an ultra-high-strength porous microsphere activated carbon prepared by an improved method. Background technique [0002] Activated carbon is an excellent adsorption material. According to different shapes, it can be divided into powder activated carbon, granular activated carbon, fibrous activated carbon and spherical activated carbon. Activated carbon fibers are mainly micropores and the micropores are directly opened on the surface of the fibers, so the adsorption and desorption speed is fast and the adsorption capacity is large. The pore structure of granular activated carbon and powdered activated carbon is relatively dispersed, and the adsorption performance is not as good as activated carbon fiber, but its cost is low. Spherical activated carbon has the advantages of smooth surface, regular shape, high mechanical strength, controllable particle size, g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 梁晓怿凌立成王琴
Owner EAST CHINA UNIV OF SCI & TECH
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