JP5348186B2 - High-purity trialkylgallium and its production method - Google Patents

High-purity trialkylgallium and its production method Download PDF

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JP5348186B2
JP5348186B2 JP2011133922A JP2011133922A JP5348186B2 JP 5348186 B2 JP5348186 B2 JP 5348186B2 JP 2011133922 A JP2011133922 A JP 2011133922A JP 2011133922 A JP2011133922 A JP 2011133922A JP 5348186 B2 JP5348186 B2 JP 5348186B2
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gallium
trialkylgallium
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英貴 野口
浩二 石地
浩之 物部
徹 平塚
健二 松重
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly pure trialkyl gallium by a simple method, and to provide a method for producing the same. <P>SOLUTION: There is provided the highly pure trialkyl gallium characterized in that the content of silicon atoms is &le;0.1 mass ppm. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、高純度トリアルキルガリウム及びその製法に関するものである。高純度トリアルキルガリウムは、例えば、エピタキシャル成長法による高機能の化合物半導体の製造原料として有用な化合物である。   The present invention relates to high-purity trialkylgallium and a method for producing the same. High-purity trialkylgallium is a useful compound as a raw material for producing a highly functional compound semiconductor by, for example, an epitaxial growth method.

従来、高純度トリアルキルガリウムの製法としては、例えば、三塩化ガリウムとトリメチルアルミニウムとをメシチレン中で反応させてトリメチルガリウムを製造する方法が知られている。しかしながら、この方法では、大量のメシチレンが必要であるため、容量の大きな反応釜の使用により操作が煩雑となり、工業的な高純度トリアルキルガリウムの製法としては不適であった(例えば、特許文献1参照)。   Conventionally, as a method for producing high-purity trialkylgallium, for example, a method for producing trimethylgallium by reacting gallium trichloride and trimethylaluminum in mesitylene is known. However, since this method requires a large amount of mesitylene, the use of a large-capacity reaction kettle makes the operation complicated and is not suitable as an industrial high-purity trialkylgallium production method (for example, Patent Document 1). reference).

特開2005-8553号公報JP 2005-8553 A

本発明の課題は、上記問題点を解決し、簡便な方法によって、高純度トリアルキルガリウム及びその方法を提供することにある。   An object of the present invention is to solve the above problems and provide a high-purity trialkylgallium and a method thereof by a simple method.

本発明の課題は、ケイ素原子の含有量が0.1質量ppm以下であることを特徴とする、高純度トリアルキルガリウムによって解決される。   The object of the present invention is solved by high-purity trialkylgallium, characterized in that the silicon atom content is 0.1 mass ppm or less.

本発明の課題は、又、一般式(1)   The subject of this invention is also general formula (1).

Figure 0005348186
Figure 0005348186

(式中、Rは、炭素原子数1〜6のアルキル基を示す。)
で示されるトリアルキルガリウムと一般式(2)
(In the formula, R 1 represents an alkyl group having 1 to 6 carbon atoms.)
And the general formula (2)

Figure 0005348186
Figure 0005348186

(式中、Rは、炭素原子数1〜6のアルキル基を示し、nは、4〜8の整数を示す。)
で示されるジアミン化合物を反応させてガリウム−ジアミン錯体を形成させ、次いで、反応混合物を蒸留して該ガリウム−ジアミン錯体を取得した後、該ガリウム−ジアミン錯体からジアミン化合物を解離させて、遊離のトリアルキルガリウムを得ることを特徴とする、高純度トリアルキルガリウムの製法によっても解決される。
(In the formula, R 2 represents an alkyl group having 1 to 6 carbon atoms, and n represents an integer of 4 to 8)
Is reacted to form a gallium-diamine complex, and then the reaction mixture is distilled to obtain the gallium-diamine complex, and then the diamine compound is dissociated from the gallium-diamine complex to form a free gallium-diamine complex. This can also be solved by a method for producing high-purity trialkylgallium, which is characterized by obtaining trialkylgallium.

本発明により、エピタキシャル成長法による高機能の化合物半導体の製造原料として有用な高純度トリアルキルガリウム及びその製法を提供することができる。   According to the present invention, it is possible to provide a high-purity trialkylgallium useful as a raw material for producing a highly functional compound semiconductor by an epitaxial growth method and a method for producing the same.

本発明に反応において使用するトリアルキルガリウムは、前記の一般式(1)で示される。その一般式(1)において、Rは、炭素数1〜6のアルキル基を示し、例えば、メチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基が挙げられるが、好ましくはメチル基、エチル基である(即ち、トリアルキルガリウムが、トリメチルガリウム、トリエチルガリウム)。なお、これらの基は、各種異性体も含む。 The trialkylgallium used in the reaction of the present invention is represented by the general formula (1). In the general formula (1), R 1 represents an alkyl group having 1 to 6 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group. Group, that is, an ethyl group (that is, trialkylgallium is trimethylgallium, triethylgallium). These groups include various isomers.

本発明に反応において使用するジアミン化合物は、前記の一般式(2)で示される。その一般式(2)において、Rは、炭素数1〜6のアルキル基であり、例えば、メチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基が挙げられるが、好ましくはn-ブチル基であり、又、nは、4〜8の整数であるが、好ましくは6である(即ち、ジアミン化合物が、N,N,N',N'-テトラブチル-1,6-ヘキサメチレンジアミン)。なお、これらの基は、各種異性体も含む。 The diamine compound used in the reaction in the present invention is represented by the general formula (2). In the general formula (2), R 2 is an alkyl group having 1 to 6 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, preferably n -Butyl group, and n is an integer of 4 to 8, but is preferably 6 (that is, the diamine compound is N, N, N ', N'-tetrabutyl-1,6-hexamethylene). Diamine). These groups include various isomers.

前記ジアミン化合物の使用量は、トリアルキルガリウム1モルに対して、好ましくは0.3〜0.8モル、更に好ましくは0.4〜0.6モルである。なお、これらのジアミン化合物は、単独又は二種以上を混合して使用しても良い。   The amount of the diamine compound used is preferably 0.3 to 0.8 mol, and more preferably 0.4 to 0.6 mol, per 1 mol of trialkylgallium. In addition, you may use these diamine compounds individually or in mixture of 2 or more types.

本発明のガリウム−ジアミン錯体の形成は、例えば、トリアルキルガリウムとジアミン化合物とを混合し、攪拌させながら反応させる等の方法によって行われる。その際の温度は、好ましくは30〜150℃、更に好ましくは40〜110℃であり、圧力は特に制限されない。   The gallium-diamine complex of the present invention is formed, for example, by a method of mixing a trialkylgallium and a diamine compound and reacting them while stirring. The temperature at that time is preferably 30 to 150 ° C., more preferably 40 to 110 ° C., and the pressure is not particularly limited.

本発明では、先に得られた混合物を蒸留して当該ガリウム−ジアミン錯体を取得した後、当該ガリウム−ジアミン錯体からジアミン化合物を解離させて、遊離の高純度トリアルキルガリウムを得ることができる。   In this invention, after distilling the mixture obtained previously and acquiring the said gallium-diamine complex, a diamine compound is dissociated from the said gallium-diamine complex, and a free high purity trialkyl gallium can be obtained.

前記反応混合物を蒸留して当該ガリウム−ジアミン錯体を取得する際の温度は、好ましくは50〜200℃、更に好ましくは100〜150℃であり、圧力は、好ましくは0.5〜100kPaA、更に好ましくは5〜10kPaAである。   The temperature at which the reaction mixture is distilled to obtain the gallium-diamine complex is preferably 50 to 200 ° C, more preferably 100 to 150 ° C, and the pressure is preferably 0.5 to 100 kPaA, more preferably 5 ~ 10kPaA.

前記ガリウム−ジアミン錯体からジアミン化合物を解離させて、遊離の高純度トリアルキルガリウムを得る方法としては、例えば、当該ガリウム−ジアミン錯体を加熱して蒸留し、その流出物として得る等の方法によって行われる。その際の温度は、好ましくは100〜220℃、更に好ましくは130〜200℃であり、圧力は、好ましくは0.5〜100kPaA、更に好ましくは20〜50kPaAである。   As a method of obtaining a free high-purity trialkylgallium by dissociating a diamine compound from the gallium-diamine complex, for example, a method of heating and distilling the gallium-diamine complex and obtaining it as an effluent is performed. Is called. The temperature at that time is preferably 100 to 220 ° C, more preferably 130 to 200 ° C, and the pressure is preferably 0.5 to 100 kPaA, more preferably 20 to 50 kPaA.

なお、前記ガリウム−ジアミン錯体の形成、蒸留によるガリウム−ジアミン錯体の取得及びガリウム−ジアミン錯体からジアミン化合物を解離させて、高純度トリアルキルガリウムを得る操作は、複数回行うことによって、より高純度のトリアルキルガリウムを得ることができる。又、トリアルキルガリウムは、公知の方法によって更に精製することもできる(例えば、非特許文献1参照)。
J.Am.Chem.Soc.,84,3605(1962)
The operations of forming the gallium-diamine complex, obtaining the gallium-diamine complex by distillation, and dissociating the diamine compound from the gallium-diamine complex to obtain a high-purity trialkylgallium are performed more than once to obtain higher purity. Of trialkylgallium can be obtained. Trialkylgallium can be further purified by a known method (see, for example, Non-Patent Document 1).
J. Am. Chem. Soc., 84, 3605 (1962)

次に、実施例を挙げて本発明を具体的に説明するが、本発明の範囲はこれらに限定され
るものではない。なお、トリアルキルアルミニウムの金属原子の分析は、誘導結合プラズマ発光分析法(ICP−OES法)により行った。
Next, the present invention will be specifically described with reference to examples, but the scope of the present invention is not limited thereto. Note that analysis of metal atoms of trialkylaluminum was performed by inductively coupled plasma optical emission spectrometry (ICP-OES method).

実施例1(高純度トリメチルガリウムの合成)
攪拌装置、ヴィグリュー型蒸留塔(2つの受器を付属)及び滴下漏斗を備えた内容積100mlの反応容器に、窒素雰囲気にて、N,N,N',N'-テトラブチル-1,6-ヘキサメチレンジアミン26g(76mmol)を加え、トリメチルガリウム(ケイ素原子を1質量ppm含む)18g(156mmol)をゆるやかに加え、攪拌しながら40℃で0.5時間攪拌させて、ガリウム−ジアミン錯体を形成させた。次いで、得られた反応混合物を減圧下で蒸留(100℃、7kPaA)し、低沸点成分(不純物)をドライアイスで冷却した受器に捕集し、ガリウム−ジアミン錯体を反応容器内に取得した。その後、ガリウム−ジアミン錯体を130〜200℃に加熱して減圧蒸留(40kPaA)し、流出物として、トリメチルガリウム12gを受器に得た(回収率;67%)。なお、得られたトリメチルガリウムは、ケイ素原子が0.05質量ppm以下、ケイ素原子以外の金属原子の合計含有量が0.56質量ppm以下(アルミニウム原子;0.09質量ppm以下、カルシウム原子;0.02質量ppm以下、カドミウム原子;0.03質量ppm以下、クロム原子;0.05質量ppm以下、銅原子;0.03質量ppm以下、鉄原子;0.05質量ppm以下、マグネシウム原子;0.02質量ppm以下、マンガン原子;0.02質量ppm以下、カリウム原子;0.1質量ppm未満、亜鉛原子;0.05質量ppm以下、ナトリウム原子;0.01質量ppm以下)しか混入していない高純度品であった。
Example 1 (Synthesis of high-purity trimethylgallium)
N, N, N ', N'-tetrabutyl-1,6-in a nitrogen atmosphere in a reaction vessel with an internal volume of 100 ml equipped with a stirrer, Vigreux-type distillation column (attached to two receivers) and a dropping funnel Hexamethylenediamine (26 g, 76 mmol) was added, trimethylgallium (containing 1 mass ppm of silicon atoms) (18 g, 156 mmol) was slowly added, and the mixture was stirred at 40 ° C. for 0.5 hours to form a gallium-diamine complex. . Subsequently, the obtained reaction mixture was distilled under reduced pressure (100 ° C., 7 kPaA), and low-boiling components (impurities) were collected in a receiver cooled with dry ice to obtain a gallium-diamine complex in the reaction vessel. . Thereafter, the gallium-diamine complex was heated to 130 to 200 ° C. and distilled under reduced pressure (40 kPaA), and 12 g of trimethylgallium was obtained in the receiver as an effluent (recovery rate: 67%). The obtained trimethylgallium has a silicon atom of 0.05 mass ppm or less and a total content of metal atoms other than silicon atoms of 0.56 mass ppm or less (aluminum atom; 0.09 mass ppm or less, calcium atom; 0.02 mass ppm or less, cadmium Atom: 0.03 mass ppm or less, chromium atom: 0.05 mass ppm or less, copper atom; 0.03 mass ppm or less, iron atom; 0.05 mass ppm or less, magnesium atom; 0.02 mass ppm or less, manganese atom; 0.02 mass ppm or less, potassium atom; Less than 0.1 ppm by mass, zinc atom; 0.05 ppm by mass or less, sodium atom; 0.01 ppm by mass or less).

比較例1(トリメチルガリウムの合成)
実施例1において、N,N,N',N'-テトラブチル-1,6-ヘキサメチレンジアミンの代わりに、トリ-n-ブチルアミン26g(127mmol)を使用した以外は、実施例1と同様にトリメチルガリウムの合成を行った。その結果、得られたトリメチルガリウムは、ケイ素原子が0.3質量ppm混入している低純度品であった。
Comparative Example 1 (Synthesis of trimethylgallium)
In Example 1, trimethyl trimethylamine was used in the same manner as in Example 1 except that 26 g (127 mmol) of tri-n-butylamine was used instead of N, N, N ′, N′-tetrabutyl-1,6-hexamethylenediamine. We synthesized gallium. As a result, the obtained trimethylgallium was a low-purity product containing 0.3 mass ppm of silicon atoms.

比較例2(トリメチルガリウムの合成)
実施例1において、N,N,N',N'-テトラブチル-1,6-ヘキサメチレンジアミンの代わりに、N,N-ジメチルアニリン17g(140mmol)を使用した以外は、実施例1と同様にトリメチルガリウムの合成を行った。その結果、ガリウム−ジアミン錯体は形成したものの、N,N-ジメチルアニリンは解離せずに、遊離のトリメチルガリウムを得ることはできなかった。
Comparative Example 2 (Synthesis of trimethylgallium)
The same procedure as in Example 1 was conducted except that 17 g (140 mmol) of N, N-dimethylaniline was used in place of N, N, N ′, N′-tetrabutyl-1,6-hexamethylenediamine. Synthesis of trimethylgallium was performed. As a result, although a gallium-diamine complex was formed, N, N-dimethylaniline was not dissociated and free trimethylgallium could not be obtained.

実施例2(高純度トリエチルガリウムの合成)
実施例1において、トリメチルガリウムの代わりにトリエチルガリウムを用いたこと以外、実施例1と同様に反応を行うと、ケイ素原子が0.1質量ppm以下の高純度トリエチルガリウムが得られる。
Example 2 (Synthesis of high-purity triethylgallium)
In Example 1, high purity triethylgallium having a silicon atom of 0.1 mass ppm or less is obtained by carrying out the reaction in the same manner as in Example 1 except that triethylgallium is used instead of trimethylgallium.

本発明は、高純度トリアルキルガリウム及びその製法に関するものである。高純度トリアルキルガリウムは、例えば、エピタキシャル成長法による高機能の化合物半導体の製造原料として有用な化合物である。   The present invention relates to high-purity trialkylgallium and a method for producing the same. High-purity trialkylgallium is a useful compound as a raw material for producing a highly functional compound semiconductor by, for example, an epitaxial growth method.

Claims (4)

一般式(1)
Figure 0005348186
(式中、Rは、炭素原子数1〜6のアルキル基を示す。)
で示されるトリアルキルガリウムと一般式(2)
Figure 0005348186
(式中、Rは、炭素原子数1〜6のアルキル基を示し、nは、4〜8の整数を示す。)
で示されるトリアルキルガリウム1モルに対して0.3〜0.8モルのジアミン化合物を反応させてガリウム−ジアミン錯体を30〜150℃で形成させ、次いで、反応混合物を蒸留して該ガリウム−ジアミン錯体を取得した後、該ガリウム−ジアミン錯体からジアミン化合物を100〜220℃、0.5〜100kPaAで解離させて、遊離のトリアルキルガリウムを得ることを特徴とする、高純度トリアルキルガリウムの製法。
General formula (1)
Figure 0005348186
(In the formula, R 1 represents an alkyl group having 1 to 6 carbon atoms.)
And the general formula (2)
Figure 0005348186
(In the formula, R 2 represents an alkyl group having 1 to 6 carbon atoms, and n represents an integer of 4 to 8)
The gallium-diamine complex is formed at 30 to 150 ° C. by reacting 0.3 to 0.8 mol of the diamine compound with respect to 1 mol of the trialkylgallium represented by the formula, and then the reaction mixture is distilled to form the gallium- After obtaining a diamine complex, a diamine compound is dissociated from the gallium-diamine complex at 100 to 220 ° C. and 0.5 to 100 kPaA to obtain free trialkyl gallium. Manufacturing method.
一般式(1)  General formula (1)
Figure 0005348186
Figure 0005348186
(式中、R(Wherein R 1 は、炭素原子数1〜6のアルキル基を示す。)Represents an alkyl group having 1 to 6 carbon atoms. )
で示されるトリアルキルガリウムと一般式(2)And the general formula (2)
Figure 0005348186
Figure 0005348186
(式中、R(Wherein R 2 は、炭素原子数1〜6のアルキル基を示し、nは、4〜8の整数を示す。)Represents an alkyl group having 1 to 6 carbon atoms, and n represents an integer of 4 to 8. )
で示されるトリアルキルガリウム1モルに対して0.3〜0.8モルのジアミン化合物を反応させてガリウム−ジアミン錯体を30〜150℃で形成させ、次いで、反応混合物を50〜200℃、0.5〜100kPaAで蒸留して該ガリウム−ジアミン錯体を取得した後、該ガリウム−ジアミン錯体からジアミン化合物を100〜220℃、0.5〜100kPaAで解離させて、遊離のトリアルキルガリウムを得ることを特徴とする、請求項1記載の高純度トリアルキルガリウムの製法。The gallium-diamine complex is formed at 30 to 150 ° C. by reacting 0.3 to 0.8 mol of the diamine compound with respect to 1 mol of the trialkylgallium represented by the following formula. Obtaining the gallium-diamine complex by distillation at 5 to 100 kPaA, and then dissociating the diamine compound from the gallium-diamine complex at 100 to 220 ° C. and 0.5 to 100 kPaA to obtain free trialkylgallium The method for producing high-purity trialkylgallium according to claim 1, wherein:
トリアルキルガリウムが、トリメチルガリウム又はトリエチルガリウムである請求項1乃至2のいずれか1項に記載の高純度トリアルキルガリウムの製法。  The method for producing high-purity trialkylgallium according to any one of claims 1 to 2, wherein the trialkylgallium is trimethylgallium or triethylgallium. ジアミン化合物が、N,N,N’,N’−テトラブチル−1,6−ヘキサメチレンジアミンである請求項1乃至2のいずれか1項に記載の高純度トリアルキルガリウムの製法。  The method for producing high-purity trialkylgallium according to any one of claims 1 to 2, wherein the diamine compound is N, N, N ', N'-tetrabutyl-1,6-hexamethylenediamine.
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