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Preparation method of millimeter activated carbon beads

An activated carbon and millimeter-scale technology, which is applied in the field of preparing activated carbon pellets, can solve the problems of undiscovered polyacrylonitrile-based millimeter-scale carbon pellets, and achieve the effects of low cost, easy operation, and simple preparation process

Inactive Publication Date: 2011-03-09
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has been no report on polyacrylonitrile-based millimeter-scale carbon pellets

Method used

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  • Preparation method of millimeter activated carbon beads
  • Preparation method of millimeter activated carbon beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Fully dissolve 10 g of homemade acrylonitrile in 100 mL of industrial dimethyl sulfoxide (DMSO). Then the obtained solution is gradually transferred to the squeezer, and the height of the liquid level in the squeezer is controlled to 5 cm. Among them, the bottom of the squeezer is a squeezing plate 2 with small holes 3, the thickness of which is about 3mm, the diameter of the small holes is 2.5mm, and the hole pitch is 10mm. The distance between the squeezing plate 2 at the bottom of the squeezer and the liquid surface of the water bath is 10 cm. The solution was dropped into a 60°C water bath to obtain a spherical polyacrylonitrile-based resin. Then put it into a tubular heating furnace, heat up to 200°C at a rate of 2°C / min, keep it for 1h, then under the protection of nitrogen, continue to heat up to 800°C, keep it for 1h, and then pass in water vapor for activation for 30min, after natural cooling A millimeter-scale activated carbon pellet with a diameter of about ...

Embodiment 2

[0028] Fully dissolve 10 g of homemade acrylonitrile in 250 mL of industrial dimethyl sulfoxide (DMSO). Then the obtained solution is gradually transferred to the squeezer, and the height of the liquid level in the squeezer is controlled to 2 cm. Among them, the bottom of the squeezer is a squeezing plate 2 with small holes 3, the thickness of which is about 3.5mm, the diameter of the small holes is 2.2mm, and the hole pitch is 12mm. The distance between the squeezing plate 2 at the bottom of the squeezer and the liquid surface of the water bath is 15 cm. The solution was dropped into a 50°C water bath to obtain a spherical polyacrylonitrile-based resin. Then put it into a tubular heating furnace, heat up to 300°C at a rate of 5°C / min, keep it for 3h, then under the protection of nitrogen, continue to heat up to 1000°C, keep it for 2h, then pass in water vapor for activation for 40min, after natural cooling A millimeter-sized activated carbon pellet with a diameter of about 1...

Embodiment 3

[0030] 10 g of commercial polyacrylonitrile was fully dissolved in 500 mL of industrial dimethyl sulfoxide (DMSO). Then the obtained solution is gradually transferred to the squeezer, and the height of the liquid level in the squeezer is controlled to 3 cm. Among them, the bottom of the squeezing device is a squeezing plate 2 with small holes 3, the thickness of which is about 4mm, the diameter of the small holes is 1.5mm, and the hole distance is 14mm. The distance between the squeezing plate 2 at the bottom of the squeezer and the liquid surface of the water bath is 20 cm. The solution was dropped into a 70°C water bath to obtain a spherical polyacrylonitrile-based resin. Then put it into a tubular heating furnace, heat up to 250°C at a rate of 1°C / min, keep it for 5h, then under the protection of nitrogen, continue to heat up to 900°C, keep it for 3h, then pass in water vapor for activation for 20min, after natural cooling A millimeter-level activated carbon pellet with a ...

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Abstract

The invention discloses a preparation method of millimeter activated carbon beads, comprising the following steps: dissolving 1 to 5 mass parts of polyacrylonitrile in 10 to 50 mass parts of dimethyl sulfoxide completely, and transferring the liquid into a liquid extruder gradually; keeping the distance between the liquid extruding plate at the bottom of the liquid extruder and the liquid level of the water bath liquid to 10 to 20 cm, and keeping the height of the liquid level in the liquid extruder constant with the height range of 2 to 10 cm; and dropwise adding the liquid into the water bath of 50 to 70 DEG C to obtain the spherical polyacrylonitrile resin; and carrying out the process of low temperature oxidation, carbonization and steam activation on the polyacrylonitrile resin to obtain the millimeter activated carbon beads. The invention has the advantages of simple operation, easy control, simple preparation process, low cost and low energy consumption. The preparation method is suitable for the mass production, and the activated carbon beads have the size of 1 to 3 mm.

Description

Technical field [0001] The invention relates to a method for preparing activated carbon pellets, in particular to a method for preparing millimeter-level activated carbon pellets using polyacrylonitrile as a precursor. Background technique [0002] Spherical activated carbon is one of the varieties of activated carbon. Its special structure and performance make it widely used in medicine, energy storage, catalyst carrier, gas purification, etc. At present, the prepared spherical activated carbons are nano-sized (Chinese invention patent CN101041429A), micro-sized (Chinese invention patent CN100556801C), and even millimeter-sized (Chinese invention patent ZL85102191, CN1102427C, CN1075539C). [0003] Polyacrylonitrile is an excellent carbon precursor material because of its high carbonization yield and graphitization properties. Regarding the preparation of polyacrylonitrile-based carbon pellets, polyacrylonitrile pellets obtained by emulsion polymerization and suspension polymeriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 李开喜李艳秋
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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