Buchi Rotavapor R-100, Руководство по эксплуатации

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BÜCHI Labortechnik AG Product description | 3
Operation Manual Rotavapor® R-100 11/60
3 Product description
3.1 Description of function
The Rotavapor® R-100 is a rotary evaporator with the aid of which single-stage distil-
lation can be carried out quickly without unduly stressing the product. The basis of the
process is the evaporation and condensing of solvents using a rotating evaporating
flask under vacuum. Distillation under vacuum increases capacity and is more gentle
on the product.
The product is heated in the evaporating flask by the heating bath. The rotary drive
unit evenly rotates the evaporating flask. This constantly mixes the product, thereby
increasing the evaporation rate. Rotation also prevents localized overheating and de-
layed evaporation.
The vapor passes from the evaporating flask through the vapor duct into the cooling
section (condenser). There, the thermal energy of the vapor is transferred to the
coolant fluid so that the vapor re-condenses. The resulting solvent is collected in the
receiving flask and can then be reused or properly disposed of.
Distillation under vacuum
The distillation capacity depends on the temperature of the heating bath, the pressure
in the evaporating flask, the speed of rotation and the size of the evaporating flask.
Lower pressure, i.e. more vacuum, reduces the boiling point of the solvent so that it
requires less heating. That means that it can be distilled more gently and at a faster
evaporation rate than processes carried out under normal ambient conditions.
To prevent undesirable solvent emission and delayed evaporation, the vacuum has to
be adjusted to suit the application and kept stable. This can be achieved by means of
a vacuum pump (we recommend the BUCHI Vacuum Pump V-100) controlled by a
vacuum regulator (we recommend the BUCHI Interface I-100). We also recommend
that the temperature difference between the coolant fluid and the heating bath is
40 °C (see Chapter 6.2.2 "Adjusting distillation conditions", page 34).