JPH08325007A - Method for separating and refining fullerenes - Google Patents

Method for separating and refining fullerenes

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Publication number
JPH08325007A
JPH08325007A JP7131642A JP13164295A JPH08325007A JP H08325007 A JPH08325007 A JP H08325007A JP 7131642 A JP7131642 A JP 7131642A JP 13164295 A JP13164295 A JP 13164295A JP H08325007 A JPH08325007 A JP H08325007A
Authority
JP
Japan
Prior art keywords
fullerene
fullerenes
crucible
vapor deposition
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7131642A
Other languages
Japanese (ja)
Other versions
JP3493533B2 (en
Inventor
Toshinori Nosaka
俊紀 野坂
Yoshiaki Sakurai
芳昭 櫻井
Kazuteru Natsukawa
一輝 夏川
Shigeo Goto
繁雄 後藤
Katsumi Nishida
勝美 西田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAIICHI NENRYO KOGYO
DAIICHI NENRYO KOGYO KK
Osaka Prefecture
Original Assignee
DAIICHI NENRYO KOGYO
DAIICHI NENRYO KOGYO KK
Osaka Prefecture
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Application filed by DAIICHI NENRYO KOGYO, DAIICHI NENRYO KOGYO KK, Osaka Prefecture filed Critical DAIICHI NENRYO KOGYO
Priority to JP13164295A priority Critical patent/JP3493533B2/en
Publication of JPH08325007A publication Critical patent/JPH08325007A/en
Application granted granted Critical
Publication of JP3493533B2 publication Critical patent/JP3493533B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE: To safely separate and refine fullerenes in a short period of time by vacuum-depositing fullerene-contg. carbon soot or the concd. extract of fullerenes. CONSTITUTION: Fullerene-contg. carbon soot obtained by a carbon electrode arc process, laser-beam evaporation, thermal decomposition, etc., or the fullerenes obtained by extracting the carbon soot with solvent, evaporating and concentrating the extract are charged into a crucible, the crucible is set in the heating part 1 of a vacuum deposition device connected to an evacuating device, and the fullerenes are vapor-deposited on a substrate 2 consisting of a heat-resistant substrate, etc., provided above the heater part 1 at 10<-1> to 10<-5> Pa and 350-700 deg.C. At this time, the fullerenes with the C60 fullerene content remarkably increased are deposited and separated by using a crucible closed with a lid having 0.1-5mm opening since C70 fullerene tends to remain in the crucible.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、炭素の同素体であるフ
ラーレン類の分離精製方法に関する。
TECHNICAL FIELD The present invention relates to a method for separating and purifying fullerenes which are allotropes of carbon.

【0002】[0002]

【従来の技術】フラーレン類とは、1985年に発見さ
れた炭素の同素体であり、炭素数60のC60フラーレ
ン、炭素数70のC70フラーレン、それ以上の炭素数の
高次フラーレン等が単離されており、固体潤滑材、光伝
導センサー、触媒、超電導材料等の各種の分野における
利用が期待されている。
BACKGROUND OF THE INVENTION Fullerenes are allotropes of carbon discovered in 1985. They are C 60 fullerenes having 60 carbon atoms, C 70 fullerenes having 70 carbon atoms, and higher fullerenes having more carbon atoms. They are separated, and are expected to be used in various fields such as solid lubricants, photoconductive sensors, catalysts, and superconducting materials.

【0003】従来のフラーレン類の合成方法は、主とし
て、カーボン電極アーク法により行われており、例えば
Ar、He等の不活性ガス雰囲気の真空装置中でカーボ
ン電極間にアーク放電を生じさせて炭素を蒸発させ、こ
れを急冷することにより、15%程度のフラーレン類を
含有する、いわゆる炭素ススが得られている。この炭素
スス中には、C60フラーレン、C70フラーレン、それ以
上の炭素数の高次フラーレン等が含まれており、これか
ら各フラーレン成分を分離する方法としては、トルエ
ン、二硫化炭素等の有機溶媒を用いて炭素ススからフラ
ーレン類を抽出して、蒸発濃縮した後、再びトルエン、
シクロヘキサン等の溶媒を用いてカラムクロマトグラフ
ィーで分離する方法が一般的である。
The conventional method for synthesizing fullerenes is mainly carried out by the carbon electrode arc method. For example, carbon is generated by causing an arc discharge between carbon electrodes in a vacuum apparatus in an atmosphere of an inert gas such as Ar or He. Is vaporized and rapidly cooled to obtain so-called carbon soot containing about 15% of fullerenes. This carbon soot contains C 60 fullerene, C 70 fullerene, and higher fullerenes having a higher carbon number, and the like. As a method for separating each fullerene component from this, organic substances such as toluene and carbon disulfide are used. Fullerenes were extracted from carbon soot using a solvent, evaporated and concentrated, and then toluene and
A method of separating by column chromatography using a solvent such as cyclohexane is common.

【0004】また、カリックスアレーンと称される化合
物を用いて、トルエン中でC60フラーレンとの錯体を形
成して沈殿を生じさせた後、この沈殿物をクロロホルム
中に入れて、錯体を分解させてフラーレンC60を沈澱さ
せ、これを分離回収することによって、C60フラーレン
を単離する方法も知られている。
Further, a compound called calixarene is used to form a complex with C 60 fullerene in toluene to form a precipitate, and the precipitate is put into chloroform to decompose the complex. There is also known a method of isolating C 60 fullerene by precipitating fullerene C 60 by separating and recovering it.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、これら
の従来のフラーレンの分離精製法は、トルエン、二硫化
炭素等の有害な溶剤を用いて湿式で行われており、抽出
と濾過に時間を要し、極めて効率の悪い方法であり、コ
ストが高くなるという欠点がある。また、抽出に用いた
溶剤の回収や抽出後に生じる溶剤を含んだ大量のすすの
処理も問題となる。
However, these conventional methods for separating and purifying fullerenes are carried out by a wet method using a harmful solvent such as toluene and carbon disulfide, and it takes time for extraction and filtration. However, this method is extremely inefficient and has a drawback of high cost. In addition, recovery of the solvent used for the extraction and treatment of a large amount of soot containing the solvent generated after the extraction are also problems.

【0006】本発明の主な目的は、安全且つ短時間にフ
ラーレンを分離精製することのできる、簡易なフラーレ
ン類の分離精製方法を提供することである。
[0006] A main object of the present invention is to provide a simple method for separating and purifying fullerenes, which is capable of separating and purifying fullerenes safely and in a short time.

【0007】[0007]

【課題を解決するための手段】本発明者は、上記した如
き目的を達成するために、鋭意研究を行った結果、カー
ボン電極アーク法等の従来公知の方法で得られたフラー
レン含有炭素スス、又はこのフラーレン含有炭素ススか
らのフラーレン類の抽出濃縮物を原料とし、これを真空
蒸着する方法によれば、C60フラーレン含有率の高いフ
ラーレン類を得ることが出来、この際、原料を入れた加
熱用ルツボに微細な開口部を設けた蓋をする場合には、
60フラーレン含有率の非常に高いフラーレン類を容易
に得ることができることを見出し、ここに本発明を完成
するに至った。
Means for Solving the Problems The inventors of the present invention have conducted extensive studies in order to achieve the above-mentioned object, and as a result, fullerene-containing carbon soot obtained by a conventionally known method such as a carbon electrode arc method, Alternatively, according to a method of vacuum-depositing a fullerene-extracted concentrate of carbon soot containing fullerene as a raw material, a fullerene having a high C 60 fullerene content can be obtained. If you want to cover the heating crucible with a fine opening,
It was found that fullerenes having a very high C 60 fullerene content can be easily obtained, and the present invention has been completed here.

【0008】即ち、本発明は、フラーレン含有炭素ス
ス、又はフラーレン含有炭素ススからのフラーレン類の
抽出濃縮物を原料として、真空蒸着することを特徴とす
るフラーレン類の分離精製方法に係る。
That is, the present invention relates to a method for separating and purifying fullerenes, which comprises vacuum-depositing fullerene-containing carbon soot or an extract concentrate of fullerenes from fullerene-containing carbon soot as a raw material.

【0009】本発明の方法では、原料としては、従来公
知の方法であるカーボン電極アーク法、レーザー蒸発
法、熱分解法などの方法で得られたフラーレン含有炭素
ススを用いることができる。このフラーレン含有炭素ス
スは、フラーレン類を10〜15重量%程度含有してお
り、このフラーレン類は、通常、C60フラーレンを主成
分とし、C60フラーレンの10分の1程度のC70フラー
レンと更に微量の高次フラーレンを含むものである。ま
た、トルエン、二硫化炭素、ベンゼン、キノリン、シク
ロヘキサン等の溶剤を用いて、上記フラーレン含有炭素
ススからフラーレン類を抽出した後、これを蒸発濃縮し
て、フラーレン類を分離取得した、いわゆる抽出フラー
レンを原料として用いることもできる。
In the method of the present invention, fullerene-containing carbon soot obtained by a conventionally known method such as a carbon electrode arc method, a laser evaporation method or a thermal decomposition method can be used as a raw material. This fullerene-containing carbon soot contains about 10 to 15% by weight of fullerenes, and this fullerene usually contains C 60 fullerene as a main component and is about one-tenth of C 60 fullerene with C 70 fullerene. Further, it contains a very small amount of higher fullerenes. Further, after extracting fullerenes from the above-mentioned carbon soot containing fullerenes by using a solvent such as toluene, carbon disulfide, benzene, quinoline, cyclohexane, etc., this is evaporated and concentrated to obtain fullerenes by separation, so-called extracted fullerenes. Can also be used as a raw material.

【0010】本発明のフラーレン類の分離精製方法は、
上記フラーレン含有炭素スス、又は抽出フラーレンを原
料として真空蒸着する方法であり、これによって原料中
に存在するフラーレン類におけるC60フラーレン/C70
フラーレン比よりも、C60フラーレン含有率の高いフラ
ーレン類を得ることができる。この方法では、特に、フ
ラーレン含有炭素ススを原料とする場合には、抽出等を
行うことなく、炭素スス中に存在するフラーレン類より
もC60フラーレン含有率の高いフラーレン類を、直接炭
素ススから分離取得することができる点で有利である。
The method for separating and purifying fullerenes of the present invention is as follows:
A method of vacuum vapor deposition using the above-mentioned fullerene-containing carbon soot or extracted fullerene as a raw material, whereby C 60 fullerene / C 70
It is possible to obtain fullerenes having a higher C 60 fullerene content than the fullerene ratio. In this method, particularly when fullerene-containing carbon soot is used as a raw material, fullerenes having a higher C 60 fullerene content than the fullerenes present in the carbon soot are directly extracted from the carbon soot without performing extraction or the like. It is advantageous in that it can be acquired separately.

【0011】真空蒸着の条件としては、原料とするフラ
ーレン含有炭素スス、又は抽出フラーレンを蒸着できる
条件であればよく、通常、真空度10-1〜10-5Pa程
度、加熱温度350〜700℃程度の条件で真空蒸着を
行えばよい。
The conditions for vacuum vapor deposition may be such that the carbon soot containing fullerene or the extracted fullerene as a raw material can be vapor deposited, and the vacuum degree is usually about 10 -1 to 10 -5 Pa and the heating temperature is 350 to 700 ° C. Vacuum vapor deposition may be performed under a certain condition.

【0012】真空蒸着装置としては、特に限定はなく、
通常の真空蒸着装置を用いることができ、例えば、ルツ
ボを加熱するための加熱ヒーターを設置し、上部に耐熱
性基板等からなる蒸着部を設けた真空容器に排気装置を
接続した構造の真空蒸着装置等を用いることができる。
The vacuum vapor deposition apparatus is not particularly limited,
An ordinary vacuum vapor deposition apparatus can be used. For example, a vacuum heater having a structure in which a heating heater for heating the crucible is installed, and an exhaust device is connected to a vacuum container having a vapor deposition section made of a heat-resistant substrate on the upper part. A device or the like can be used.

【0013】本発明方法では、加熱用ルツボとしては、
蓋を有しない上部が解放された構造の通常の加熱用ルツ
ボを用いることができ、この場合にも、原料に含まれる
フラーレン類と比べてC60フラーレン含有率の高いフラ
ーレン類を得ることが可能であるが、特に、直径0.1
mm〜5mm程度の開口部を有する蓋をしたルツボを用
いることが好ましく、0.2mm〜2mm程度の開口部
を有する蓋をしたルツボを用いることがより好ましい。
この様な範囲の開口部を有するルツボを用いることによ
って、原料としたフラーレン含有炭素スス、又は抽出フ
ラーレンに含まれるフラーレン類と比べて、C60フラー
レン含有率が非常に高いフラーレン類を得ることができ
る。本発明方法によれば、加熱用ルツボの開口径を小さ
くするに従って、C60フラーレンの含有率を高くするこ
とができ、蒸着条件と開口径を適切に設定することによ
って、C60フラーレン量が99重量%を上回る高純度の
フラーレンを得ることも可能である。
In the method of the present invention, as the heating crucible,
It is possible to use a normal crucible for heating, which has an open top without a lid, and in this case as well, it is possible to obtain fullerenes having a higher C 60 fullerene content than the fullerenes contained in the raw material. However, in particular, the diameter is 0.1
It is preferable to use a crucible with a lid having an opening of about mm to 5 mm, and more preferable to use a crucible with a lid having an opening of about 0.2 mm to 2 mm.
By using a crucible having an opening in such a range, fullerenes having a very high C 60 fullerene content can be obtained as compared with fullerenes contained in the raw material fullerene-containing carbon soot or extracted fullerenes. it can. According to the method of the present invention, the content rate of C 60 fullerene can be increased as the opening diameter of the heating crucible is made smaller, and by appropriately setting the vapor deposition conditions and the opening diameter, the amount of C 60 fullerene can be 99. It is also possible to obtain high-purity fullerenes in excess of wt%.

【0014】また、ルツボの開口径が小さくなると、蒸
着速度が遅くなって、処理効率が低下するので、単一の
開口部を有するルツボに限られず、処理速度を早くする
ために、複数の開口部を有するルツボを用いることもで
きる。このような複数の開口部を有するルツボを用いる
場合には、これと同一の開口径の開口部を1個有するル
ツボを用いる場合と比べて、蒸着物中のC60フラーレン
の割合が低下するが、処理速度を早くすることができる
ので、要求されるフラーレンの純度、処理速度等に応じ
て、適宜、ルツボの開口径、開口部の数等を決めればよ
い。
Further, when the opening diameter of the crucible becomes smaller, the vapor deposition rate becomes slower and the processing efficiency lowers. Therefore, the crucible is not limited to the crucible having a single opening, and a plurality of openings are provided for increasing the processing speed. It is also possible to use a crucible having a part. When a crucible having such a plurality of openings is used, the proportion of C 60 fullerene in the deposit is reduced as compared with the case where a crucible having one opening having the same opening diameter is used. Since the processing speed can be increased, the opening diameter of the crucible, the number of openings, and the like may be appropriately determined according to the required purity of fullerene, the processing speed, and the like.

【0015】また、上記した蒸着処理後、ルツボ中に残
存する未蒸発物中には、C70フラーレン及びそれ以上の
炭素数の高次フラーレンが濃縮されており、蒸着処理を
繰り返すことにより、炭素数70以上の高次フラーレン
を分離することもできる。よって、本発明方法は、高次
フラーレンの分離精製方法としても有用である。
Further, after the above vapor deposition treatment, the C 70 fullerene and higher fullerenes having a carbon number higher than that are concentrated in the non-evaporated material remaining in the crucible. Higher-order fullerenes of several 70 or more can be separated. Therefore, the method of the present invention is also useful as a method for separating and purifying higher fullerenes.

【0016】また、本発明では、加熱用ルツボからの蒸
発物を同一の真空容器内にある第二の加熱用ルツボ中に
ルツボ底部から導入し、この第二の加熱用ルツボを上記
した条件、即ち、真空度10-1〜10-5Pa程度、加熱
温度350〜700℃程度に維持して、第二の加熱用ル
ツボからの蒸発物を蒸着させることによって、加熱用ル
ツボを1個だけ用いた場合と比べて、蒸着物中のC60
ラーレンの純度をより向上させることができる。この場
合には、第一の加熱用ルツボ及び第二の加熱用ルツボ
に、上記したような適度な開口部を有する蓋をすること
によって、C60フラーレン含有率がより高いフラーレン
類を得ることができる。また、加熱用ルツボを2段に接
続する方法だけでなく、加熱用ルツボを3段以上の多段
に接続することも可能であり、この様に多段に接続する
ことによって、蒸着物中のC60フラーレンの純度をより
向上させることも可能である。
Further, in the present invention, the evaporation material from the heating crucible is introduced into the second heating crucible in the same vacuum container from the bottom of the crucible, and the second heating crucible is subjected to the above-mentioned conditions. That is, the vacuum degree of about 10 −1 to 10 −5 Pa and the heating temperature of about 350 to 700 ° C. are maintained, and the evaporation material from the second heating crucible is vapor-deposited to use only one heating crucible. The purity of C 60 fullerene in the deposit can be further improved as compared with the case where it is present. In this case, a fullerene having a higher C 60 fullerene content can be obtained by covering the first heating crucible and the second heating crucible with a lid having an appropriate opening as described above. it can. Further, not only the method of connecting the heating crucible in two stages, it is also possible to connect the heating crucible 3 or more stages, by connecting in multiple stages in this way, C 60 in the deposit It is also possible to further improve the purity of fullerene.

【0017】[0017]

【発明の効果】本発明のフラーレンの分離精製方法は、
乾式法によってフラーレンを分離精製する方法であり、
従来の有機溶剤を用いる方法と比べて、安全且つ短時間
に処理することができ、大量分離精製法として有効な方
法である。
The method for separating and purifying fullerenes of the present invention comprises:
It is a method of separating and purifying fullerenes by a dry method,
Compared with the conventional method using an organic solvent, it can be treated safely and in a short time, and is an effective method as a large-scale separation and purification method.

【0018】[0018]

【実施例】以下、実施例を挙げて本発明を更に詳細に説
明する。
EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples.

【0019】実施例1 カーボン電極アーク法で合成したフラーレン含有炭素ス
スを原料として用いた。この炭素ススを下記の条件で高
速液体クロマトグラフィー(HPLC)によりC70フラ
ーレンとC60フラーレンに分離して、両者の比率を求め
たところ、C70フラーレン/C60フラーレン(重量比)
=0.123であった。
Example 1 Fullerene-containing carbon soot synthesized by the carbon electrode arc method was used as a raw material. This carbon soot was separated into C 70 fullerene and C 60 fullerene by high performance liquid chromatography (HPLC) under the following conditions, and the ratio of the two was determined. C 70 fullerene / C 60 fullerene (weight ratio)
Was 0.123.

【0020】HPLC分析条件 カラム:COSMOSIL(4.6mmφ×150mm) 移動相:トルエン 流速:1.0ml/分 カラム温度:30℃ 検出波長:330nm圧力:37kg/cm 2 高純度黒鉛製の加熱用ルツボ(内径14mmφ、深さ1
5mm)を用い、これに原料のフラーレン含有スス約1
00mgを充填した。このルツボに、直径0.2mm、
0.5mm、1mm又は2mmの開口部を1個有する4
種類の蓋をした各々の場合について、以下の方法で蒸着
を行った。
HPLC analysis conditions Column: COSMOSIL (4.6 mmφ × 150 mm) Mobile phase: Toluene Flow rate: 1.0 ml / min Column temperature: 30 ° C. Detection wavelength: 330 nm Pressure: 37 kg / cm 2 High-purity graphite crucible for heating (Inner diameter 14 mmφ, depth 1
5 mm), and about 1 fullerene-containing soot as a raw material
00 mg was charged. In this crucible, a diameter of 0.2 mm,
4 with one 0.5 mm, 1 mm or 2 mm opening
The vapor deposition was carried out by the following method for each case with each type of lid.

【0021】図1に示す真空蒸着装置を用い、加熱用ヒ
ーター部分1に加熱用ルツボを置き、ルツボ−基板間距
離160mmとなるようにスライドガラス製の蒸着用基
板2を設置した。
Using the vacuum vapor deposition apparatus shown in FIG. 1, a heating crucible was placed on the heating heater portion 1, and a vapor deposition substrate 2 made of slide glass was placed so that the distance between the crucible and the substrate was 160 mm.

【0022】真空蒸着装置の圧力が10-5Paとなるま
で真空排気した後、ルツボを500℃に加熱して、1時
間蒸着を行い、蒸着用基板2に付着したフラーレン類を
回収した。また、加熱温度を600℃にすること以外は
同様にして蒸着を行い、蒸着用基板2に付着したフラー
レン類を回収した。
After evacuation to a pressure of 10 −5 Pa in the vacuum vapor deposition apparatus, the crucible was heated to 500 ° C. and vapor deposition was carried out for 1 hour to recover fullerenes attached to the vapor deposition substrate 2. Further, vapor deposition was performed in the same manner except that the heating temperature was set to 600 ° C., and fullerenes attached to the vapor deposition substrate 2 were recovered.

【0023】得られたフラーレンを上記と同様の条件で
HPLCで分離し、C70フラーレンとC60フラーレンの
重量比を求めた。使用したルツボの蓋の開口径とC70
ラーレン/C60フラーレン重量比との関係のグラフを図
2に示す。
The resulting fullerenes were separated by HPLC under the same conditions as above, and the weight ratio of C 70 fullerene to C 60 fullerene was determined. A graph of the relationship between the opening diameter of the crucible lid used and the C 70 fullerene / C 60 fullerene weight ratio is shown in FIG. 2.

【0024】図2に示す結果から、ルツボの開口径が小
さくなるに従って、C60フラーレン含有率の高いフラー
レン類が得られることが判る。尚、加熱用ルツボの蓋を
開けて500℃で処理した場合には、C70フラーレン/
60フラーレン(重量比)=0.08のフラーレンが得
られた。
From the results shown in FIG. 2, it is understood that as the crucible opening diameter becomes smaller, fullerenes having a higher C 60 fullerene content can be obtained. In addition, when the lid of the heating crucible is opened and the treatment is performed at 500 ° C., C 70 fullerene /
A fullerene of C 60 fullerene (weight ratio) = 0.08 was obtained.

【0025】また、蒸着後のルツボ内の残留物を上記と
同様の条件でHPLCで分離して、C70フラーレンとC
60フラーレンの重量比を求めた。使用したルツボの蓋の
開口径と残留物中のC70フラーレン/C60フラーレン重
量比との関係のグラフを図3に示す。
Further, the residue in the crucible after vapor deposition was separated by HPLC under the same conditions as above to obtain C 70 fullerene and C
The weight ratio of 60 fullerenes was determined. A graph showing the relationship between the opening diameter of the crucible used and the weight ratio of C 70 fullerene / C 60 fullerene in the residue is shown in FIG.

【0026】図3から明らかな様に、ルツボ中の残留物
では、蒸着前のフラーレン含有炭素ススと比べて、C70
フラーレンの割合の増加が認められた。また、このルツ
ボ残留物のHPLC分析により、原料としたフラーレン
含有炭素ススでは、含有量が非常に少ないために存在が
ほとんど認められなかった炭素数が70を上回る高次フ
ラーレンについて、含有割合の増加が認められた。これ
らの結果から、本発明方法は、炭素数70以上の高次フ
ラーレンの濃縮方法としても有用であることが判る。
As is apparent from FIG. 3, in the residue in the crucible, the C 70 was higher than that in the carbon soot containing fullerene before vapor deposition.
An increase in the proportion of fullerenes was observed. In addition, the HPLC analysis of the crucible residue revealed that in the fullerene-containing carbon soot used as a raw material, the content ratio of the higher fullerene having a carbon number of more than 70, which was hardly recognized due to its extremely small content, increased. Was recognized. From these results, it is found that the method of the present invention is useful as a method for concentrating higher fullerenes having 70 or more carbon atoms.

【0027】実施例2 実施例1において原料としたフラーレン含有炭素スス
を、ソックスレー抽出器を用いて、トルエンを抽出溶媒
として130℃で環流抽出した後、真空蒸発器(70〜
80mmHg、50〜55℃)により抽出液からトルエ
ンを分離して抽出フラーレンを得た。この抽出フラーレ
ンを原料として用いること以外は、実施例1と同様にし
て真空蒸着を行った。この抽出フラーレンにおけるC70
フラーレンとC60フラーレンの重量比は、C70フラーレ
ン/C60フラーレン(重量比)=0.139であった。
蒸着用基板に付着したフラーレンについて、実施例1と
同様にしてC70フラーレンとC60フラーレンの重量比を
求めた。使用したルツボの蓋の開口径とC70フラーレン
/C60フラーレン重量比との関係のグラフを図2に示
す。この結果から、ルツボの開口径が小さくなるに従っ
て、C60フラーレンの割合の多いフラーレンを得ること
ができ、C60フラーレンの純度が99%以上のものを得
ることも可能であることが判る。
Example 2 Fullerene-containing carbon soot used as a raw material in Example 1 was reflux-extracted at 130 ° C. with toluene as an extraction solvent using a Soxhlet extractor, and then vacuum evaporator (70-70) was used.
Toluene was separated from the extract with 80 mmHg, 50 to 55 ° C.) to obtain an extracted fullerene. Vacuum evaporation was performed in the same manner as in Example 1 except that this extracted fullerene was used as a raw material. C 70 in this extracted fullerene
The weight ratio of fullerene to C 60 fullerene was C 70 fullerene / C 60 fullerene (weight ratio) = 0.139.
With respect to the fullerene attached to the vapor deposition substrate, the weight ratio of C 70 fullerene and C 60 fullerene was determined in the same manner as in Example 1. A graph of the relationship between the opening diameter of the crucible lid used and the C 70 fullerene / C 60 fullerene weight ratio is shown in FIG. 2. This result according to the opening diameter of the crucible is reduced, C 60 fullerene proportion of large fullerenes can be obtained in the purity of the C 60 fullerene seen that it is also possible to obtain more than 99%.

【0028】また、加熱用ルツボに直径0.5mmの開
口部を37個開けた蓋をして、500℃で蒸着した場合
には、C70フラーレン/C60フラーレン(重量比)=
0.07のフラーレン類が得られ、加熱用ルツボの蓋を
開けて500℃で蒸着した場合には、C70フラーレン/
60フラーレン(重量比)=0.115のフラーレンが
得られた。
When the heating crucible is covered with 37 openings each having a diameter of 0.5 mm and vapor deposition is performed at 500 ° C., C 70 fullerene / C 60 fullerene (weight ratio) =
0.07 fullerenes were obtained, and when the lid of the heating crucible was opened and vapor deposition was performed at 500 ° C., C 70 fullerenes /
C 60 fullerene (weight ratio) = 0.115 was obtained.

【0029】また、ルツボ残留物におけるC70フラーレ
ン/C60フラーレン重量比と使用したルツボの蓋の開口
径との関係を実施例1と同様にして求めた結果を図3に
示す。この結果から明らかな様に、蒸着前の抽出フラー
レンと比べて、C70フラーレンの割合の増加が認められ
た。また、このルツボ残留物のHPLC分析により、原
料とした抽出フラーレンでは、含有量が非常に少ないた
めに存在がほとんど認められなかった炭素数が70を上
回る高次フラーレンについて、含有割合の増加が認めら
れた。これらの結果から、本発明方法は、炭素数70以
上の高次フラーレンの濃縮方法としても有用であること
が判る。
The relationship between the C 70 fullerene / C 60 fullerene weight ratio in the crucible residue and the opening diameter of the crucible lid used was determined in the same manner as in Example 1, and the results are shown in FIG. As is clear from this result, an increase in the proportion of C 70 fullerenes was observed as compared with the extracted fullerenes before vapor deposition. In addition, by HPLC analysis of the crucible residue, the content of the extracted fullerene used as a raw material was higher than that of the higher fullerene having a carbon number of more than 70, which was hardly recognized because of its extremely low content. Was given. From these results, it is found that the method of the present invention is useful as a method for concentrating higher fullerenes having 70 or more carbon atoms.

【0030】実施例3 実施例2で原料として用いたものと同様の抽出フラーレ
ンを原料とし、図4に示す真空蒸着装置を用いて真空蒸
着を行った。図4の真空蒸着装置では、第一の加熱用ヒ
ーター部3に原料の抽出フラーレンを入れた加熱用ルツ
ボを置き、このルツボに開口部を有する蓋をし、この蓋
の開口部と同一内径を有する黒鉛製の接続用パイプ4で
第二の加熱用ヒーター部5にある加熱用ルツボの底部に
接続し、第二の加熱用ヒーター部のルツボと基板との距
離を160mmとなるようにスライドガラス製の蒸着用
基板6を設置した。
Example 3 Using the same extracted fullerene as that used in Example 2 as a raw material, vacuum vapor deposition was performed using the vacuum vapor deposition apparatus shown in FIG. In the vacuum vapor deposition apparatus of FIG. 4, a heating crucible containing the extraction fullerene of the raw material is placed in the first heating heater section 3, and the crucible is covered with a lid having the same inner diameter as the opening of the lid. It is connected to the bottom of the heating crucible in the second heating heater section 5 with the graphite connecting pipe 4 and has a slide glass so that the distance between the crucible of the second heating heater section and the substrate is 160 mm. The manufactured vapor deposition substrate 6 was installed.

【0031】第一の加熱用ヒーター部3と第二の加熱用
ヒーター部5にある加熱用ルツボには、同一の開口径を
有する蓋をして蒸着を行い、開口径が0.2mm、0.
5mm、1mm又は2mmの開口部を1個有する4種類
の蓋をした場合について実験を行った。
The heating crucibles in the first heating heater section 3 and the second heating heater section 5 are covered with a lid having the same opening diameter for vapor deposition, and the opening diameter is 0.2 mm, 0. .
Experiments were carried out with four types of lids each having one opening of 5 mm, 1 mm or 2 mm.

【0032】真空蒸着装置の圧力は、10-5Paとし、
第一の加熱用ヒーター部3と第二の加熱用ヒーター部5
にある加熱用ルツボの温度は同一温度とし、500℃及
び600℃の2種類の加熱温度で1時間蒸着を行った。
The pressure of the vacuum vapor deposition apparatus is 10 -5 Pa,
First heating heater section 3 and second heating heater section 5
The temperature of the heating crucible in 2 was the same, and vapor deposition was performed for 1 hour at two heating temperatures of 500 ° C. and 600 ° C.

【0033】蒸着用基板に付着したフラーレンについ
て、実施例1と同様にしてC70フラーレンとC60フラー
レンの重量比を求めた。使用したルツボの蓋の開口径と
70フラーレン/C60フラーレン重量比との関係のグラ
フを図5に示す。
For the fullerenes attached to the vapor deposition substrate, the weight ratio of C 70 fullerenes and C 60 fullerenes was determined in the same manner as in Example 1. A graph of the relationship between the opening diameter of the crucible lid used and the C 70 fullerene / C 60 fullerene weight ratio is shown in FIG. 5.

【0034】この結果から、ルツボの開口径が小さくな
るに従って、C60フラーレンの割合の多いフラーレンを
得ることができることが判る。特に、実施例2におけ
る、加熱用ルツボを1個用いた場合の結果と比較するこ
とによって、ルツボを多段に接続して処理する方法によ
れば、一段処理の場合と比べてC60フラーレンをより高
純度化することが出来、この方法はフラーレンを効率よ
く分離精製する方法として有用であることが判る。
From these results, it is understood that fullerene having a large proportion of C 60 fullerene can be obtained as the opening diameter of the crucible becomes smaller. In particular, according to the method in which the crucible was connected in multiple stages and treated by comparing with the result in the case of using one heating crucible in Example 2, the C 60 fullerene was compared with the case of the one-stage treatment. It can be highly purified, and it is understood that this method is useful as a method for efficiently separating and purifying fullerenes.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例1で用いた真空蒸着装置の一例の概略
図。
FIG. 1 is a schematic diagram of an example of a vacuum vapor deposition apparatus used in Example 1.

【図2】蒸着物中のC70フラーレン/C60フラーレン重
量比とルツボ開口径との関係を示すグラフ。
FIG. 2 is a graph showing a relationship between a weight ratio of C 70 fullerene / C 60 fullerene in a deposit and a crucible opening diameter.

【図3】ルツボ残留物中のC70フラーレン/C60フラー
レン重量比とルツボ開口径との関係を示すグラフ。
FIG. 3 is a graph showing the relationship between the C 70 fullerene / C 60 fullerene weight ratio in the crucible residue and the crucible opening diameter.

【図4】実施例3で用いた真空蒸着装置の一例の概略
図。
FIG. 4 is a schematic view of an example of a vacuum vapor deposition apparatus used in Example 3.

【図5】実施例3における蒸着物中のC70フラーレン/
60フラーレン重量比とルツボ開口径との関係を示すグ
ラフ。
FIG. 5: C 70 fullerene in the deposit in Example 3 /
Graph showing the relation between C 60 fullerene weight ratio and the crucible opening diameter.

【符号の説明】[Explanation of symbols]

1 加熱用ヒーター部 2 蒸着用基板 3 第一の加熱用ヒーター部 4 接続パイプ 5 第二の加熱用ヒーター部 6 蒸着用基板。 DESCRIPTION OF SYMBOLS 1 Heating heater part 2 Deposition substrate 3 First heating heater part 4 Connection pipe 5 Second heating heater part 6 Deposition substrate.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 夏川 一輝 大阪府堺市赤坂台5丁28−5 (72)発明者 後藤 繁雄 兵庫県姫路市飾磨区中島3001番地 第一燃 料工業株式会社内 (72)発明者 西田 勝美 兵庫県姫路市飾磨区中島3001番地 第一燃 料工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuki Natsukawa 5-5-5 Akasakadai, Sakai City, Osaka Prefecture (72) Inventor Shigeo Goto 3001, Nakajima, Shikama-ku, Himeji-shi, Hyogo Daiichi Fuel Industry Co., Ltd. ( 72) Inventor Katsumi Nishida 3001 Nakajima, Shikama-ku, Himeji-shi, Hyogo Prefecture Inside Dai-ichi Fuel Industry Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】フラーレン含有炭素スス、又はフラーレン
含有炭素ススからのフラーレン類の抽出濃縮物を原料と
して、真空蒸着することを特徴とするフラーレン類の分
離精製方法。
1. A method for separating and purifying fullerenes, which comprises vacuum-depositing fullerene-containing carbon soot or an extractive concentrate of fullerenes from fullerene-containing carbon soot as a raw material.
JP13164295A 1995-05-30 1995-05-30 Separation and purification method of fullerenes Expired - Fee Related JP3493533B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13164295A JP3493533B2 (en) 1995-05-30 1995-05-30 Separation and purification method of fullerenes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13164295A JP3493533B2 (en) 1995-05-30 1995-05-30 Separation and purification method of fullerenes

Publications (2)

Publication Number Publication Date
JPH08325007A true JPH08325007A (en) 1996-12-10
JP3493533B2 JP3493533B2 (en) 2004-02-03

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Country Link
JP (1) JP3493533B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1491496A1 (en) * 2002-03-13 2004-12-29 Mitsubishi Chemical Corporation Process for production of fullerenes and method for separation thereof
US6878361B2 (en) 2001-07-10 2005-04-12 Battelle Memorial Institute Production of stable aqueous dispersions of carbon nanotubes
US6896864B2 (en) 2001-07-10 2005-05-24 Battelle Memorial Institute Spatial localization of dispersed single walled carbon nanotubes into useful structures

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6878361B2 (en) 2001-07-10 2005-04-12 Battelle Memorial Institute Production of stable aqueous dispersions of carbon nanotubes
US6896864B2 (en) 2001-07-10 2005-05-24 Battelle Memorial Institute Spatial localization of dispersed single walled carbon nanotubes into useful structures
US7731929B2 (en) 2001-07-10 2010-06-08 Battelle Memorial Institute Spatial localization of dispersed single walled carbon nanotubes into useful structures
US7968073B2 (en) 2001-07-10 2011-06-28 Battelle Memorial Institute Stable aqueous dispersions of carbon nanotubes
EP1491496A1 (en) * 2002-03-13 2004-12-29 Mitsubishi Chemical Corporation Process for production of fullerenes and method for separation thereof
EP1491496A4 (en) * 2002-03-13 2006-10-25 Mitsubishi Chem Corp Process for production of fullerenes and method for separation thereof

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