<p><b>過錳酸鈉</b>是一種無機化合物，化學式為NaMnO<sub>4</sub>。
</p>


<h2><span id=".E6.80.A7.E8.B4.A8"></span><span id="性质">性質</span></h2>
<p>過錳酸鈉是一種紅紫色晶體或粉末，不易得到無水物。易溶於水、乙醇和乙醚，溶於液氨。氧化性較強。易潮解，因此應用不如過錳酸鉀廣泛。在鹼中以及加熱至170°C以上時分解。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {2NaMnO_{4}{\xrightarrow {\triangle }}Na_{2}MnO_{4}+MnO_{2}+O_{2}\uparrow }}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {2NaMnO_{4}{\xrightarrow {\triangle }}Na_{2}MnO_{4}+MnO_{2}+O_{2}\uparrow }}}</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>軟錳礦粉在高溫和空氣存在下鹼熔焙燒，得到錳酸鈉，然後用水或母液溶浸後，在93～95°C通入氯氣氧化，至pH為6.5～6.8為止，得過錳酸鈉溶液，再經蒸發濃縮、結晶、離心分離，得過錳酸鈉成品。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ 4NaOH+MnO_{2}+O_{2}\rightarrow 2Na_{2}MnO_{4}+2H_{2}O}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ 4NaOH+MnO_{2}+O_{2}\rightarrow 2Na_{2}MnO_{4}+2H_{2}O}}}</annotation>
  </semantics></math></span></span></dd>
<dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ 2Na_{2}MnO_{4}+Cl_{2}\rightarrow 2NaMnO_{4}+2NaCl}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ 2Na_{2}MnO_{4}+Cl_{2}\rightarrow 2NaMnO_{4}+2NaCl}}}</annotation>
  </semantics></math></span></span></dd>
<dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ Na_{2}MnO_{4}+2Cl_{2}+4NaOH+MnO_{2}\rightarrow 2NaMnO_{4}+4NaCl}}}">
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    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ Na_{2}MnO_{4}+2Cl_{2}+4NaOH+MnO_{2}\rightarrow 2NaMnO_{4}+4NaCl}}}</annotation>
  </semantics></math></span></span><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ +2H_{2}O}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ +2H_{2}O}}}</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E5.8F.83.E8.A6.8B"></span><span id="參見">參見</span></h2>
<ul><li>過錳酸鉀</li>
<li>過錳酸鈣</li>
<li>過錳酸銨</li></ul><h2><span id=".E7.94.A8.E9.80.94"></span><span id="用途">用途</span></h2>
<p>用作氧化劑、消毒劑、殺菌劑以及嗎啡和磷的解毒劑等。可作過錳酸鉀的代用品，用於甲苯法制糖精時的氧化劑、鄰甲苯磺醯胺的精製及含酚廢水處理等。</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>
**過錳酸鈉**是一種無機化合物，化學式為 NaMnO4。

## 性質

過錳酸鈉是一種紅紫色晶體或粉末，不易得到無水物。易溶於水、乙醇和乙醚，溶於液氨。氧化性較強。易潮解，因此應用不如過錳酸鉀廣泛。在鹼中以及加熱至 170°C 以上時分解。

　
: ${\rm {2NaMnO_{4}{\xrightarrow {\triangle }}Na_{2}MnO_{4}+MnO_{2}+O_{2}\uparrow }}$

## 製備

軟錳礦粉在高溫和空氣存在下鹼熔焙燒，得到錳酸鈉，然後用水或母液溶浸後，在 93～95°C 通入氯氣氧化，至 pH 為 6.5～6.8 為止，得過錳酸鈉溶液，再經蒸發濃縮、結晶、離心分離，得過錳酸鈉成品。

　
: ${\rm {\ 4NaOH+MnO_{2}+O_{2}\rightarrow 2Na_{2}MnO_{4}+2H_{2}O}}$

　
: ${\rm {\ 2Na_{2}MnO_{4}+Cl_{2}\rightarrow 2NaMnO_{4}+2NaCl}}$

　
: ${\rm {\ Na_{2}MnO_{4}+2Cl_{2}+4NaOH+MnO_{2}\rightarrow 2NaMnO_{4}+4NaCl}}$ ${\rm {\ +2H_{2}O}}$

## 參見

* 過錳酸鉀
* 過錳酸鈣
* 過錳酸銨

## 用途

用作氧化劑、消毒劑、殺菌劑以及嗎啡和磷的解毒劑等。可作過錳酸鉀的代用品，用於甲苯法制糖精時的氧化劑、鄰甲苯磺醯胺的精製及含酚廢水處理等。

## 參考資料
10101-50-5