Fail:Toluene with sodium-benzophenone.jpg

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Ringkasan

Keterangan
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

Gallery

  • 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
Tarikh 4 September 2006 (original upload date)
Sumber Transferred from en.wikipedia to Commons by omegakent.
Pengarang Rifleman 82 at Inggeris Wikipedia

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Public domain Rifleman 82 at Inggeris Wikipedia selaku pemegang hak cipta karya ini melepaskan karya ini ke dalam domain awam di seluruh dunia.
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Log muat naik asal

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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4 September 2006

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Tarikh/WaktuGambar kenitUkuranPenggunaKomen
semasa01:23, 11 Ogos 2009Gambar kenit bagi versi pada 01:23, 11 Ogos 20091,200 × 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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