JP2020535100A - 天然ゴムからのカーボンナノチューブの製造方法 - Google Patents
天然ゴムからのカーボンナノチューブの製造方法 Download PDFInfo
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- 239000008139 complexing agent Substances 0.000 claims description 4
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- ZZCONUBOESKGOK-UHFFFAOYSA-N aluminum;trinitrate;hydrate Chemical compound O.[Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O ZZCONUBOESKGOK-UHFFFAOYSA-N 0.000 description 1
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- AOPCKOPZYFFEDA-UHFFFAOYSA-N nickel(2+);dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O AOPCKOPZYFFEDA-UHFFFAOYSA-N 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/16—Preparation
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/755—Nickel
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Abstract
Description
この出願は、2017年9月27日に出願されたシンガポール出願番号第10201707943S号の優先権の利益を主張し、すべての目的のためにその全体が参照により本明細書に組み込まれる。
第1の成分の硝酸塩は、Niの硝酸塩、Feの硝酸塩、Coの硝酸塩の少なくとも1つから選択され得る。
これらの酸化物は、触媒中の担体として機能し得る。
(実験結果)
(ゴムの分解)
(触媒の調製)
(カーボンナノチューブの成長)
Claims (25)
- 天然ゴムからカーボンナノチューブを合成する方法であって、
天然ゴム又はその誘導体を含む第1の材料を提供すること、
前記第1の材料を第1の温度で中間材料に熱分解すること、
前記中間材料を触媒と接触させること、及び
カーボンナノチューブを形成するために、触媒と接触している前記中間材料を第2の温度で熱処理すること、を含む、方法。 - 前記第1の材料を熱分解するステップが、第1の場所で実施され、前記第1の場所が、第1の炉内又は前記第1の炉のセクション内である、請求項1に記載の方法。
- 前記中間材料を熱処理するステップが、第2の場所で実施され、前記第2の場所が第2の炉又は前記第1の炉の第2のセクションから選択される、請求項1又は2に記載の方法。
- (i)前記第1の材料を熱分解するステップ及び(ii)前記中間材料を熱処理するステップの少なくとも1つが、フォーミングガス下で実施され、前記フォーミングガスが、ガス流として提供される、請求項3に記載の方法。
- 前記ガス流が、前記第1の場所から前記第2の場所までであり、それにより、前記中間材料を前記第1の場所から前記第2の場所まで搬送することができる、請求項4に記載の方法。
- 前記第1の温度が、約200℃〜約500℃から選択される、前記請求項のいずれかに記載の方法。
- 前記第2の温度が、約600℃〜約800℃から選択される、前記請求項のいずれかに記載の方法。
- 反応の残渣から前記カーボンナノチューブを分離すること、をさらに含む、前記請求項のいずれかに記載の方法。
- 前記触媒が、前記第2の場所で触媒前駆体として提供され、前記第2の場所で前記触媒に変換される、請求項3から8のいずれかに記載の方法。
- フレッシュ触媒を製造するために使用済みの前記触媒をリサイクルすること、をさらに含む、前記請求項のいずれかに記載の方法。
- 前記触媒を形成すること、をさらに含み、前記触媒を形成する方法は、任意にゾル−ゲルプロセスを用いて、溶液又はゲルを形成すること、を含む、前記請求項のいずれかに記載の方法。
- 少なくとも第1の成分の硝酸塩の形態の第1の成分及び錯化剤が、前記溶液又は前記ゲルを形成するために使用される、請求項11に記載の方法。
- 前記第1の成分が、遷移金属及び/又は混合金属であり、好ましくは、遷移金属、貴金属から選択され、さらに好ましくは、Ni、Fe、Coの少なくとも1つから選択される、請求項12に記載の方法。
- 少なくとも第2の成分の硝酸塩の形態の第2の成分が、前記溶液又は前記ゲルを形成するために使用される、請求項11又は13に記載の方法。
- 前記第2の成分が、Al、Si、Mg、La、それらの組み合わせから選択される、請求項14に記載の方法。
- 前記溶液又は前記ゲルを、乾燥、任意に粉砕、及び焼成して焼成物を得ること、及び
元素状態の前記第1の成分を粒子として放出するために、前記焼成物を還元すること、をさらに含む、請求項12から15のいずれかに記載の方法。 - 前記第2の成分が、焼成中に酸化物に変換され、前記酸化物は、好ましくは、Al2O3、SiO2、MgO、La2O3の少なくとも1つから選択される、請求項16に記載の方法。
- 乾燥中に採用される乾燥温度が、約60℃〜約120℃から選択される、請求項16又は17に記載の方法。
- 焼成中に採用される焼成温度が、約500℃〜約800℃から選択される、請求項16から18のいずれかに記載の方法。
- 還元ステップが、水素ガスの存在下で実施される、請求項16から19のいずれかに記載の方法。
- 還元ステップ中の温度が、約650℃〜約800℃である、請求項16から20のいずれかに記載の方法。
- 前記第1の材料が、10重量%未満の加硫ゴムを含み、任意に、前記天然ゴムが、ラテックス、凝固ラテックスの1つ以上である、前記請求項のいずれかに記載の方法。
- 前記天然ゴム誘導体が、リサイクルゴムであり、前記リサイクルゴムが、硫黄を除去するために処理される、請求項1から21のいずれかに記載の方法。
- 前記第1の材料が、天然ゴムの処理から得られるゴム廃棄物である、請求項1から21のいずれかに記載の方法。
- 請求項4から24のいずれかに記載の方法によって製造されて得られるカーボンナノチューブの平均特性を調整するための調整方法であって、
前記方法を参照方法として実施することにより参照平均直径を含むカーボンナノチューブを製造すること、を含み、かつ
カーボンナノチューブの前記平均直径を減少させるために、前記参照方法に関連して、前記第2の温度を低下させること、及び/又は反応時間を減少させること、及び/又は前記フォーミングガス中のH2濃度を増加させること、或いは
カーボンナノチューブの前記平均直径を増加させるために、前記参照方法に関連して、前記第2の温度を上昇させること、及び/又は反応時間を増加させること、及び/又は前記フォーミングガス中のH2濃度を減少させること、を含む、方法。
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