<p><b>2-乙基己醇</b>是一種有機化合物，分子式為C<sub>8</sub>H<sub>18</sub>O，它是一種具有手性的支鏈醇。
</p>


<h2><span id=".E6.80.A7.E8.B4.A8"></span><span id="性质">性質</span></h2>
<p>無色有特殊氣味液體。可燃。粘度：9.8 mPa·s（20°C）。
溶於約720倍的水，與醇、醚和氯仿等多數有機溶劑互溶。與水形成共沸混合物，其中水占20％，共沸點99.1°C。
</p>
<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>1、丙烯與合成氣經羰基合成得到丁醛，後者兩分子羥醛縮合得到2-乙基-2-己烯醛，最後加氫，得到2-乙基-1-己醇。
</p>
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  </semantics></math></span></span></dd></dl><p><br></p><p>2、兩分子乙醛羥醛加成為丁醇醛，失水得巴豆醛，加氫等正丁醛，然後兩分子正丁醛縮合為2-乙基-2-己烯醛，最後加氫得2-乙基-1-己醇。
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ 2CH_{3}CHO\ {\xrightarrow {NaOH}}\ CH_{3}CH(OH)CH_{2}CHO\ {\xrightarrow {-H_{2}O}}\ }}}">
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  </semantics></math></span></span></dd>
<dd>正丁醛縮合失水以及產物加氫的方程式與（1）中相同。</dd></dl><h2><span id=".E7.94.A8.E9.80.94"></span><span id="用途">用途</span></h2>
<p>用於製取鄰苯二甲酸二(2-乙基己基)酯、對苯二甲酸二(2-乙基己基)酯、壬二酸二異辛酯和癸二酸二異辛酯等增塑劑。也用於合成抗氧化劑、潤滑劑、消泡劑、溶劑，用於照相、紙張上漿、膠乳和織物印染等方面。
</p>
<h2><span id=".E5.8F.82.E8.80.83.E8.B5.84.E6.96.99"></span><span id="参考资料">參考資料</span></h2>

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**2 - 乙基己醇**是一種有機化合物，分子式為 C8H18O，它是一種具有手性的支鏈醇。

## 性質

無色有特殊氣味液體。可燃。粘度：9.8 mPa・s（20°C）。
溶於約 720 倍的水，與醇、醚和氯仿等多數有機溶劑互溶。與水形成共沸混合物，其中水占 20％，共沸點 99.1°C。

## 製備

1、丙烯與合成氣經羰基合成得到丁醛，後者兩分子羥醛縮合得到 2 - 乙基 - 2 - 己烯醛，最後加氫，得到 2 - 乙基 - 1 - 己醇。

　
: ${\rm {\ CH_{3}CH\!=\!CH_{2}+CO+H_{2}\ {\xrightarrow[{150\!-\!200^{\circ }C,\ 20MPa}]{cat.}}\ }}$ ${\rm {\ CH_{3}CH_{2}CH_{2}CHO}}$

 

　
: ${\rm {\ 2CH_{3}CH_{2}CH_{2}CHO\ {\xrightarrow {-H_{2}O}}\ }}$ ${\rm {\ CH_{3}CH_{2}CH_{2}CH\!=\!C(C_{2}H_{5})CHO}}$

　
: ${\rm {\ CH_{3}CH_{2}CH_{2}CH\!=\!C(C_{2}H_{5})CHO\ {\xrightarrow {+2H_{2}}}\ }}$ ${\rm {\ CH_{3}CH_{2}CH_{2}CH_{2}CH(C_{2}H_{5})CH_{2}OH}}$

 

2、兩分子乙醛羥醛加成為丁醇醛，失水得巴豆醛，加氫等正丁醛，然後兩分子正丁醛縮合為 2 - 乙基 - 2 - 己烯醛，最後加氫得 2 - 乙基 - 1 - 己醇。

　
: ${\rm {\ 2CH_{3}CHO\ {\xrightarrow {NaOH}}\ CH_{3}CH(OH)CH_{2}CHO\ {\xrightarrow {-H_{2}O}}\ }}$ ${\rm {\ CH_{3}CH\!=\!CHCHO\ {\xrightarrow[{Ni}]{H_{2}}}\ CH_{3}CH_{2}CH_{2}CHO}}$

　
: 正丁醛縮合失水以及產物加氫的方程式與（1）中相同。

## 用途

用於製取鄰苯二甲酸二 (2 - 乙基己基) 酯、對苯二甲酸二 (2 - 乙基己基) 酯、壬二酸二異辛酯和癸二酸二異辛酯等增塑劑。也用於合成抗氧化劑、潤滑劑、消泡劑、溶劑，用於照相、紙張上漿、膠乳和織物印染等方面。

## 參考資料
104-76-7