BUCHI Rotavapo R-100 - Manual (Page 35)

BÜCHI Labortechnik AG Operation | 6
Operation Manual Rotavapor® R­100 35/60
6.2.3 Optimization distillation
Depending on the solvent involved, it may also be possible to further optimize the dis­
tillation process. The distillation should always be set up so that the condensate does
not cover more than three quarters of the coil in the condenser. The top quarter should
remain exposed.
WARNING
Risk of explosion from excessive internal pressure
The evaporating flask and/or the condenser could explode if the internal pressure pro­
duced by evaporation becomes too great.
u Make sure that the internal pressure inside the glass components is never greater
than atmospheric pressure.
If the condensation is below 3/4 of the condenser:
u increase the vacuum.
That will lower the boiling point and more vapor will enter the condenser.
u In applications where no vacuum is applied, raise the temperature of the heating
bath if necessary.
That will cause more solvent to evaporate.
If the condensation is above 3/4 of the condenser:
u decrease the vacuum.
That will raise the boiling point and less vapor will enter the condenser.