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Mesopore spherical activated carbon and preparation method thereof

A technology of spherical activated carbon and small balls, which is applied in the field of mesoporous spherical activated carbon, can solve the problems of high cost, many production steps and complicated process of spherical activated carbon, and achieve the effects of high yield, easy operation and simple process

Inactive Publication Date: 2008-05-14
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method has many production steps, complex process, or high energy consumption and low yield, resulting in higher cost of spherical activated carbon prepared

Method used

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  • Mesopore spherical activated carbon and preparation method thereof

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Embodiment 1

[0020] Styrene-divinylbenzene copolymer pellets with a crosslinking degree of 20% were impregnated with a 10% by weight zinc chloride solution, and stirred at a constant temperature of 30° C. for 15 hours. After filtration, the spherical polymer was dried at 110°C for 8 hours, and then activated at 800°C for 2 hours under the protection of nitrogen. The prepared spherical activated carbon was sequentially used with 0.5mol L -1 dilute hydrochloric acid and distilled water until the effluent is neutral and no chloride ions are detected.

Embodiment 2

[0022] Styrene-divinylbenzene copolymer pellets with a crosslinking degree of 60% were impregnated with a 30% by weight zinc chloride solution, and stirred at a constant temperature of 60° C. for 10 hours. After filtration, the spherical polymer was dried at 110°C for 3 hours, and then activated at 600°C for 2 hours under nitrogen protection. The prepared spherical activated carbon was sequentially washed with 0.1mol L -1 dilute hydrochloric acid and distilled water until the effluent is neutral and no chloride ions are detected.

Embodiment 3

[0024] The polystyrene-divinylbenzene copolymer pellets with a cross-linking degree of 100% were impregnated with a 50% zinc chloride solution, and stirred at a constant temperature of 80° C. for 5 hours. After filtration, the spherical polymer was dried at 110°C for 8 hours, and then activated at 800°C for 5 hours under the protection of nitrogen. The prepared spherical activated carbon was sequentially treated with 0.3mol L -1 dilute hydrochloric acid and distilled water until the effluent is neutral and no chloride ions are detected.

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Abstract

The invention discloses a mesopore spherical active carbon and the preparation method. First, stirring and digging the styrene-divinylbenzene copolymer beads in the zinc chloride solution with the weight percent concentration ranging from 10 percent to 50 percent in the temperature ranging from 30 DEG C to 80 DEG C for 5 to 15 hours; drying the polymer beads for 3 to 8 hours in the temperature ranging from 60 DEG C to 110 DEG C after filteration and then activating the beads for 1 to 5 hours under the protection of nitrogen in the temperature ranging from 400 DEG C to 900 DEG C; washing the spherical active carbon with the dilute hydrochloric acid of 0.1 to 0.5 mol / L and distilled water in sequence until the effluent is neutral and no chloride ion is detected. The invention has the advantages of simple structure, high yield, low activating temperature requirement and energy consumption saving. The yield of the produced mesopore spherical active carbon is over 54 percent and the mesopore rate reaches 74 percent to 85 percent. The invention has optimistic application prospect in the fields of liquidoid adsorption, biomedicine, catalysis, electronics and other fields.

Description

Technical field: [0001] The invention relates to activated carbon and a preparation method thereof, in particular to a method for preparing spherical activated carbon with well-developed mesopores and the prepared mesoporous spherical activated carbon. Background technique: [0002] Activated carbon materials have been applied in many new fields, such as catalyst supports, battery electrodes, electric double layer capacitors, energy gas storage, biomedicine and adsorption, separation and purification of macromolecular substances. Activated carbons required for these applications typically have high mesoporosity, which allows large molecules or ions to enter the pores of the activated carbon. Spherical activated carbon has the advantages of uniform filling, low fluid resistance, high adsorption efficiency, wear resistance, high mechanical strength and good physiological compatibility, and has attracted more and more attention. The preparation of spherical activated carbon wi...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 李爱民朱兆连闫蕾钟声赵卫伟刘福强周友东李莹张全兴
Owner NANJING UNIV
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