JP2008297201A - 活性炭、その製造方法、分極性電極および電気二重層キャパシタ - Google Patents
活性炭、その製造方法、分極性電極および電気二重層キャパシタ Download PDFInfo
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- JP2008297201A JP2008297201A JP2008162445A JP2008162445A JP2008297201A JP 2008297201 A JP2008297201 A JP 2008297201A JP 2008162445 A JP2008162445 A JP 2008162445A JP 2008162445 A JP2008162445 A JP 2008162445A JP 2008297201 A JP2008297201 A JP 2008297201A
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- Prior art keywords
- activated carbon
- water
- ppm
- hydrochloric acid
- washing
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- 229940007718 zinc hydroxide Drugs 0.000 description 1
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Abstract
【解決手段】炭素質材料を賦活処理して活性炭を得る際に、重金属の総含有量を20ppm以下且つアルカリ金属の総含有量を200ppm以下とする。
【選択図】図1
Description
石油の分解残渣を熱処理して得たメトラー軟化点285℃の光学的異方性ピッチを幅2mmのスリット中に直径0.2mmの紡糸孔を1000個有するノズルを用いてメルトブロー紡糸し、不融化処理および炭化処理してメソフェーズピッチ炭素繊維を製造した。
実施例A1において、炭酸水で洗浄しなかった以外は、実施例A1と同様の操作を繰り返すことにより、活性炭を得た。
実施例A1において、炭素材を20μm以下に粉砕したフェノール樹脂炭化物50gを使用した以外は実施例A1と同様の操作を繰り返すことにより、活性炭5.9gを得た。
実施例A2において、炭酸水で洗浄しなかった以外は、実施例A2と同様の操作を繰り返すことにより、活性炭を得た。
得られた実施例A1〜A2、比較例A1〜A2のそれぞれの活性炭100mgを、硝酸200mL、次いで過塩素酸20mLで湿式分解した後、原子吸光分析装置(偏光ゼーマン原子吸光光度計 Z−5300、(株)日立製作所製)を用いて、残存するカリウム、ナトリウム金属分を測定した。得られた結果を結果を表1に示す。なお、他のアルカリ金属分(リチウム、セシウム)についても測定したが、含有量は検出限界(1ppm)以下であった。従って、アルカリ金属総含有量は、実質的にカリウムおよびナトリウムの合計含有量に等しいものであった。
石油の分解残渣を熱処理して得たメトラー軟化点285℃の光学的異方性ピッチを幅2mmのスリット中に直径0.2mmの紡糸孔を1000個有するノズルを用いてメルトブロー紡糸し、不融化処理および炭化処理してメソフェーズピッチ炭素繊維を製造した。
実施例B1において、アンモニア水で洗浄しなかった以外は、実施例B1と同様の操作を繰り返すことにより、活性炭を得た。
実施例B1において、炭素材を20μm以下に粉砕したフェノール樹脂炭化物50gを使用した以外は実施例B1と同様の操作を繰り返すことにより、活性炭5.9gを得た。
実施例B2において、アンモニア水で洗浄しなかった以外は、実施例B2と同様の操作を繰り返すことにより、活性炭を得た。
得られた実施例B1〜B2、比較例B1〜B2のそれぞれの活性炭100mgを、硝酸200mL、次いで過塩素酸20mLで湿式分解した後、誘電結合型プラズマ発光分析装置(ICP分析装置、IRIS AP、日本ジャーレルアッシュ社製)を用いて、残存するニッケル、銅、亜鉛および鉄を含む重金属の含有量を測定した。得られた結果を第2表に示す。
石油の分解残渣を熱処理して得たメトラー軟化点285℃の光学的異方性ピッチを、幅2mmのスリット中に直径0.2mmの紡糸孔を1000個有するノズルを用いてメルトブロー紡糸し、不融化処理および炭化処理してメソフェーズピッチ炭素繊維を製造した。
使用すべき酸性水溶液として、2重量%過酸化水素を含む1規定塩酸を使用した以外は実施例C1と同様の操作により、活性炭を製造した。
使用すべき酸性水溶液として、過酸化水素を含まない塩酸を使用した以外は実施例C1と同様の操作により、活性炭を製造した。
得られた実施例C1〜C2、比較例C1のそれぞれの活性炭0.2gを硝酸240mL、次いで過塩素酸20mLで湿式分解し、誘電結合型プラズマ発光分析装置(ICP分析装置、IRIS AP、日本ジャーレルアッシュ社製)を用いて、残存するニッケル、鉄および亜鉛を含む重金属の含有量を定量した。結果を第3表に示す。
石油の分解残渣を熱処理して得たメトラー軟化点285℃の光学的異方性ピッチを、幅2mmのスリット中に直径0.2mmの紡糸孔を1000個有するノズルを用いてメルトブロー紡糸し、不融化処理および炭化処理してメソフェーズピッチ炭素繊維(ペトカマテリアルズ製)を製造した。
実施例D1において、1規定塩酸に代えて2規定塩酸を使用した以外は実施例D1と同様の操作により、活性炭を製造した。
実施例D1において、80℃のイオン交換水の使用量を2Lから1Lとした以外は実施例D1と同様の操作により、活性炭を製造した。
実施例D1において、80℃の1規定塩酸による洗浄を20℃で行った以外は実施例D1と同様の操作により、活性炭を製造した。
実施例D1において、1規定塩酸に代えて4規定塩酸を使用した以外は実施例D1と同様の操作により、活性炭を製造した。
実施例D1において、80℃のイオン交換水洗浄を20℃で行った以外は実施例D1と同様の操作により、活性炭を製造した。
得られた実施例D1〜D3、比較例D1〜D3のそれぞれの活性炭0.2gを硝酸240mL、次いで過塩素酸20mLで湿式分解し、誘電結合型プラズマ発光分析装置(ICP分析装置、IRIS AP、日本ジャーレルアッシュ社製)を用いて、残存するニッケルを含む重金属の含有量を定量し、また原子吸光分析装置(偏光ゼーマン原子吸光光度計 Z−5300、(株)日立製作所製)を用いて、残存するカリウム金属を含むアルカリ金属の含有量を測定した。結果を表4に示す。
実施例D1と同様にして得た賦活処理物を直径3cmの加圧濾過器に充填し、80℃のイオン交換水2リットル(L)で0.2MPaの圧力下に洗浄した。次いで、20℃の炭酸濃度1重量%の炭酸水1Lで0.2MPaの圧力下で洗浄した。続いて、80℃の1規定塩酸水2Lで0.2MPaの圧力下で洗浄した。次いで、30℃、5%アンモニア水0.5Lで0.2MPaの圧力下で洗浄した。最後に、60℃のイオン交換水3Lで洗浄し、乾燥することにより活性炭を得た。
実施例D1と同様にして得た賦活処理物を直径3cmの加圧濾過器に充填し、80℃のイオン交換水2リットル(L)で0.2MPaの圧力下に洗浄した。次いで、20℃の炭酸濃度1重量%の炭酸水1Lで0.2MPaの圧力下で洗浄した。続いて、80℃の1規定塩酸水2Lで0.2MPaの圧力下で洗浄した。次いで、30℃、5%アンモニア水0.5Lで0.2MPaの圧力下で洗浄した後、更に80℃の1規定塩酸水0.5Lで0.2MPaの圧力下で洗浄し、最後に、60℃のイオン交換水3Lで洗浄し、乾燥することにより活性炭を得た。
得られた実施例D4およびD5のそれぞれの活性炭0.2gを硝酸240ミリリットル(mL)、次いで過塩素酸20mLで湿式分解し、誘電結合型プラズマ発光分析装置(ICP分析装置 IRIS AP、日本ジャーレルアッシュ社製)を用いて、残存するニッケルを含む重金属の含有量を定量し、また原子吸光分析装置(偏光ゼーマン原子吸光光度計 Z−5300、(株)日立製作所製)を用いて、残存するカリウム金属を含むアルカリ金属の含有量を測定した。得られた結果を表5に示す。
Claims (18)
- 易黒鉛化炭素質材料をアルカリ賦活処理して得られた活性炭であって、重金属の総含有量が20ppm以下であり、アルカリ金属の含有量が200ppm以下であることを特徴とする活性炭。
- 該重金属が、ニッケル、鉄、銅および亜鉛から選ばれる少なくとも1種の金属である請求項1記載の活性炭。
- ニッケルの含有量が8ppm以下である請求項1記載の活性炭。
- 鉄の含有量が0.3ppm以下である請求項1記載の活性炭。
- 亜鉛の含有量が0.3ppm以下である請求項1記載の活性炭。
- 銅の含有量が1ppm以下である請求項1記載の活性炭。
- 該アルカリ金属が、ナトリウムおよび/またはカリウムである請求項1記載の活性炭。
- 銀の含有量が0.1ppm以下である請求項1記載の活性炭。
- 炭化水素系溶剤による抽出処理により抽出される炭素分が0.2重量%以下である請求項1記載の活性炭。
- 易黒鉛化炭素質材料をアルカリ賦活処理し、得られた賦活処理物を、熱水、熱塩酸および水の順で洗浄することにより活性炭を得ることを特徴とする活性炭の製造方法。
- 易黒鉛化炭素質材料をアルカリ賦活処理し、得られた賦活処理物を、熱水、炭酸水、熱塩酸、アンモニア水および熱水の順で洗浄することにより活性炭を得ることを特徴とする活性炭の製造方法。
- 易黒鉛化炭素質材料をアルカリ賦活処理し、得られた賦活処理物を、熱水、炭酸水、熱塩酸、アンモニア水、熱塩酸および熱水の順で、洗浄することにより活性炭を得ることを特徴とする活性炭の製造方法。
- アルカリ賦活処理の際に賦活助剤として使用するアルカリ金属水酸化物が、水酸化ナトリウムおよび/または水酸化カリウムである請求項10〜12のいずれかに記載の活性炭の製造方法。
- 該熱水の温度が、30℃〜95℃である請求項10〜12のいずれかに記載の活性炭の製造方法。
- 該熱塩酸の温度が、60℃〜90℃である請求項10〜12のいずれかに記載の活性炭の製造方法。
- 該熱塩酸の濃度が、0.5〜3規定である請求項10〜12のいずれかに記載の活性炭の製造方法。
- 請求項1〜9のいずれかに記載の活性炭と、少なくともバインダーおよび導電性材料を混合して成形してなる分極性電極。
- 請求項17記載の分極性電極を用いた電気二重層キャパシタ。
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JP2010168238A (ja) * | 2009-01-21 | 2010-08-05 | Kansai Coke & Chem Co Ltd | 高純度化活性炭の製造方法、及び該製造方法によって得られた電気二重層キャパシタ |
JP2011001232A (ja) * | 2009-06-19 | 2011-01-06 | Kansai Coke & Chem Co Ltd | 活性炭の製造方法および該製造方法により得られた活性炭を用いた電気二重層キャパシタ |
JPWO2016021738A1 (ja) * | 2014-08-08 | 2017-05-25 | 株式会社クレハ | 非水電解質二次電池負極用炭素質材料 |
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US10797319B2 (en) | 2014-08-08 | 2020-10-06 | Kureha Corporation | Production method for carbonaceous material for non-aqueous electrolyte secondary battery anode, and carbonaceous material for non-aqueous electrolyte secondary battery anode |
Also Published As
Publication number | Publication date |
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JP2008297200A (ja) | 2008-12-11 |
JP5041164B2 (ja) | 2012-10-03 |
WO2004011371A1 (ja) | 2004-02-05 |
AU2003246253B2 (en) | 2009-12-03 |
AU2003246253B8 (en) | 2010-01-07 |
CN1671621A (zh) | 2005-09-21 |
AU2003246253A1 (en) | 2004-02-16 |
KR20050026066A (ko) | 2005-03-14 |
US7759289B2 (en) | 2010-07-20 |
JPWO2004011371A1 (ja) | 2005-12-15 |
EP1526114A1 (en) | 2005-04-27 |
CN100380547C (zh) | 2008-04-09 |
EP1526114A4 (en) | 2011-09-07 |
KR100984989B1 (ko) | 2010-10-04 |
JP4238830B2 (ja) | 2009-03-18 |
US20050266990A1 (en) | 2005-12-01 |
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