Archivo: Distillation of dry and oxygen-free toluene

Descripción: 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. ]] and benzophenone to produce dry, oxygen-free toluene. 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. 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.
Título: Distillation of dry and oxygen-free toluene
Créditos: Transferido desde en.wikipedia a Commons por Liftarn usando CommonsHelper.
Autor(a): Rifleman 82 de Wikipedia en inglés
Términos de Uso: Dominio Público
Licencia: Dominio Público
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