6 Operation
60
R-220 Pro Continuous Operation Manual, Version A
6 2
Optimal distillation conditions
To achieve optimal distillation conditions, all distillation energy supplied by the heating bath must be
removed by the condenser The physical cooling capacity of the condenser must not be exeeded in
order to avoid steam emission by overpressure inside the assembly!
NOTE:
• A temperature gradient of 20 °C between 'heating bath
→
vapor' and 'vapor
→
cooling medium' is
optimal for most distillation tasks This rule can also be applied to other temperature ranges
• During aeration (e g to suppress foam formation) the condensation height can decrease
• Condensation over the complete condenser height is a sign for unsufficient cooling capacity!
Adjust the distillation parameters (e g lower the cooling medium temperature) to stabilize the
condensation zone at approximately 2/3 to 3/4 during operation
Cooling water source:
max 20 °C
Vapor: 40 °C
Bath: 60 °C
Typical distillation parameter settings:
•
Set the bath temperature to 60 °C
•
Use cooling water / medium with less than 20 °C
•
Allow cooling water / medium to flow through the condenser at approximately 120 — 150 l/h
•
Adjust pressure parameter to reach a boiling point of ~40 °C for the used solvent In most cases it is
necessary to apply a vacuum! Information about the corresponding pressure for common solvents can
be found in the following ‘Solvent table’
Advantages associated with bath temperatures of 60 °C:
•
Water can be used as heating medium (cost efficient, good availability)
•
Comparatively low comsumption of heating energy compared to higher bath temperatures
•
Gentle product treatment at moderate temperature
•
Shorter cooling-off time for evaporating flask and heating medium
