32
Rotavapor
R-220 EX
5 Operation
Fig. 5.5: Splash protector
5.4 Splash Protector
The splash protector folds back on the side lever. It is fitted
with a rear and a front stop.
5.5 Tips and Tricks
5.5.1 Selection of the Distillation Temperature
In order to attain optimum distillation conditions, the energy
supplied to the distillation from the bath must be dissipated
again across the cooler. In order to ensure this, it is best to
work according to the following rule of thumb:
Cooling water
∆
T2 Boiling temperature
∆
T1 Bath
max. 20 ºC
40 ºC
60 ºC
How do you attain these conditions?
• Set the bath temperature at 60 ºC.
• Adjust the cooling water. Its temperature should not be
higher than 20 ºC.
• Allow the cooling water to flow through the cooler at a
rate of about 120–150 liters/hr.
• Select the working vacuum so that the boiling point of
the solvent is at 40 ºC.
• Obtain the corresponding value for the vacuum from the
Table of solvents.
