Buchi Rotavapor R-200, Руководство по эксплуатации

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BÜCHI Rotavapor R-200/205
3 Function
3.2 Functional principle
With a vacuum rotary evaporator, single step distillations are
performed quickly and in a product friendly manner. The basis
of this procedure is the evaporation and condensation of
solvents using a rotating evaporating flask.
Distillations can be performed under vacuum. This increases
performance and helps to protect products. Distillations can
be performed under vacuum and atmospheric pressure.
An example using the V assembly
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Evaporation area
The solvent is heated over a heating bath. In the rotating
evaporating flask, a thin solvent film forms on the inside of
the flask, resulting in increased evaporation rate. Rotation
also results in even mixing of the sample and thus, prevents
stationary over heating in the flask. (Maximum weight 3 kg)
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Rotation drive
The drive unit makes sure that the evaporating flask rotates
evenly with the resulting advantages (see item 1).
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Cooling area
The solvent vapour flows very quickly in the condenser.
Here, the energy in the solvent vapour is transferred to
the cooling medium (mostly water) and the solvent
condenses.
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Receiving flask
The receiving flask receives the condensing solvent.
Vacuum
Vacuum reduces the boiling temperature and thus
increases performance of distillation.
Evaporating performance is influenced by distillation
pressure (vacuum), heating bath temperature, rotation
speed and size of evaporating flask.
See Chapter 5.7, ”Selecting distillation conditions”, for
information on selecting the optimum distillation conditions.
Picture 6: R-205 Basic Glass assembly
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