Exp118

=Purification of Propionaldehyde=

=Objective= To purify propionaldehyde by distillation.

=Procedure= [|Propionaldehyde] (crude, 25mL) was distilled in a 100mL round bottom flask under a gentle flow of N2 gas. The distillate was collected as 3 fractions in graduated centrifuge tubes

Results
Propionaldehyde [|HNMR] [|HNMR]
 * Crude**
 * Fraction-2**

Distillation was successful.
 * Conclusion**

10:10 Started heating crude propionaldehyde on a heating mantle with variac in a 100ml round single neck round bottom flask under a gentle flow of N2 (one bubble a sec) The crude propionaldehyde was constantly stirred with a mag. stirrer. (Variac (V)-60 Temp (t) 25. 10:22 V-60; t-26 10:23 Reflux started 3 drops a sec. 10:29 V-60, t= 46 10:31 First drop in the fraction collector. 10:40 About 0.7mL (118-F1)distillate collected, changed the fraction collector. 10:40 V-60, t= 45 10:52 Collected about 0.8mL distillate in the fraction collector- 118-F2 10:55 Changed the fraction collector.... 11 05 Turned off the variac, stopped heating. Third fraction still plugged in...don't need it
 * Log**

[|A picture of the setting.]