Method for purifying plant-derived carbon precursor

A purification method and technology of carbon precursors, applied in the direction of carbon preparation/purification, etc., can solve the problems of difficult removal of phosphorus, difficult stabilization, insufficient removal effect of hydrofluoric acid, etc., achieve good recovery rate and improve quality

Inactive Publication Date: 2017-05-31
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrofluoric acid does not sufficiently remove magnesium and calcium, and it is difficult to remove phosphorus
Furthermore, in the method of Patent Document 1, the content of metal elements in the plant-derived material varies with seasons and regions, so it is difficult to stabilize it as an industrial raw material.

Method used

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  • Method for purifying plant-derived carbon precursor
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  • Method for purifying plant-derived carbon precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] 150 g of small pieces of coconut shells from Mindanao, Philippines, about 10 mm square were immersed in 2000 g of a 7.4% by weight aqueous solution of citric acid, and heated to 90° C. for 3 hours. After cooling to room temperature, the liquid was removed by filtration. This operation was performed three times to perform deliming. The delimed coconut shells were dried under vacuum at 1 Torr at 80°C for 24 hours. The coconut shell pieces purified in this manner were carbonized under the above-mentioned carbonization conditions. The recovery rate of carbide was 28.4%.

Embodiment 2

[0147] In Example 1, carbides were produced in the same manner as in Example 1 except that a 2.4% by weight aqueous acetic acid solution was used. The recovery rate of carbide was 28.6%.

Embodiment 3

[0149] In Example 1, carbides were produced in the same manner as in Example 1 except that a 1.2% aqueous acetic acid solution was used. The recovery rate of carbide was 28.9%.

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Abstract

The invention pertains to a method for purifying a carbon precursor useful in the production of carbon materials used in porous materials such as activated carbon, catalyst supports, electroconductive materials, and the like, and to a method for producing carbide using this carbon precursor. The invention provides a method for purifying a plant-derived carbon precursor, the method including sufficiently lowering the contained amount of metal elements and/or non-metallic elements by immersing the plant-derived carbon precursor in an organic acid aqueous solution.

Description

technical field [0001] This patent application claims priority to Japanese Patent Application No. 2014-178377 (filing date September 2, 2014) and Japanese Patent Application No. 2014-178379 (filing date September 2, 2014), which are hereby incorporated by reference Incorporate their entire contents into this specification. [0002] The present invention relates to a method for purifying a carbon precursor useful for producing a carbon material used in a conductive material, a catalyst carrier, and a porous body such as activated carbon, and a method for producing a carbide using the carbon precursor. Background technique [0003] Carbon materials are used in various applications such as electrodes for capacitors, electrodes for electrolysis, activated carbon, and carriers, and are fields and raw materials that are expected to be further developed in the future. These carbon materials have conventionally been produced using coconut shells, coal coke, coal or petroleum pitch,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 但马杏实伊泽隆文奥野壮敏岩崎秀治
Owner KURARAY CO LTD
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