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File:Toluene with sodium-benzophenone.jpg

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English: Toluene is refluxed in sodium-benzophenone to remove oxygen and water, before being distilled. Photo taken 4 Sep 2006. Keywords: reflux, toluene, sodium, benzophenone, distillation, desiccation
  • A bottle of benzophenone by Lancaster.
    A bottle of benzophenone by Lancaster.
  • Toluene is refluxed with sodium and benzophenone to produce dry, oxygen-free toluene.
    Toluene is refluxed with sodium and benzophenone to produce dry, oxygen-free toluene.
  • The mixture is still not blue yet indicating that the reaction is not complete.
    The mixture is still not blue yet indicating that the reaction is not complete.
  • The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture.
    The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture.
  • After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask.
    After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask.

Category:desiccants

Category:distillation
日期 2006年9月4日 (原始上傳日期)
來源 Transferred from en.wikipedia to Commons by omegakent.
作者 英文維基百科的Rifleman 82

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原始上傳日誌

Transferred from en.wikipedia to Commons by omegakent.

The original description page was here. All following user names refer to en.wikipedia.
  • 2006-09-04 17:00 Rifleman 82 1200×1600× (396460 bytes) Taken in my lab on 4 Sep 2006.

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目前2009年8月11日 (二) 01:23於 2009年8月11日 (二) 01:23 版本的縮圖1,200 × 1,600（387 KB）Omegakent{{Information |Description={{en|Toluene is refluxed in sodium-benzophenone to remove oxygen and water, before being distilled. Photo taken 4 Sep 2006. Keywords: en:reflux, en:toluene, en:sodium, en:benzophenone, [[:en:distillation

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