Distillation_of_dry_and_oxygen-free_toluene.jpg

Summary

Description
English: Distillation of dry and oxygen-free toluene from sodium - benzophenone desiccant . Glassware are under a slight positive nitrogen pressure from the side-arm of the receiving Schlenk flask to prevent oxygen contamination. Note that this is not a closed system - the nitrogen supply is connected to an oil bubbler (not in picture) to prevent overpressure.

Photo taken on 6 Sep 2006.

Keywords: distillation , toluene , sodium , benzophenone , desiccant

Gallery

  • A bottle of benzophenone by Lancaster.
    A bottle of benzophenone by Lancaster.
  • ]] and benzophenone to produce dry, oxygen-free toluene.
    ]] 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.
Date 5 September 2006 (original upload date)
Source Transferred from en.wikipedia to Commons by Liftarn using CommonsHelper .
Author Rifleman 82 at English Wikipedia

Licensing

Public domain This work has been released into the public domain by its author, Rifleman 82 at English Wikipedia . This applies worldwide.
In some countries this may not be legally possible; if so:
Rifleman 82 grants anyone the right to use this work for any purpose , without any conditions, unless such conditions are required by law.

Original upload log

The original description page was here . All following user names refer to en.wikipedia.
  • 2006-09-05 16:23 Rifleman 82 1600×1200× (391204 bytes) Distillation of dry and oxygen-free toluene from [[sodium]]-[[benzophenone]] [[desiccant]]. [[Laboratory glassware|Glassware]] are under a slight positive nitrogen pressure from the side-arm of the receiving Schlenk flask to prevent oxygen contamination.

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5 September 2006

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