BUCHI Vacuum Pump V-710 - Manual (Page 41)

6 Operation
41 V-700/710 Operation Manual, Version E
6 .3 Optimizing the distillation conditions
Depending on the solvent being distilled the distillation might have to be re-optimized. In the optimized
case, the condenser should be steamed up to between 2/3 to 3/4, see figure below.
If this is not the case, there are two possibilities to optimize the distillation:
• When the heating bath has reached 60 °C slowly reduce the pressure. Thus, the boiling point of
the solvent is reduced and Δ T
1
increases resulting in an increase of distillation capacity.
• When the heating bath has reached 60 °C increase the bath temperature. Thus Δ T
1
increases
resulting in an increase of distillation capacity as well.
NOTE
When the bath temperature is increased, not all of the additional energy is used for distillation but a
major part is discharged into the environment due to the increasing difference between heating bath
and the ambient temperature.
3/4
Fig. 6.2: Optional condensation area of a condenser