The appliance consists of an evaporation flask rotated by the heavy-duty motor in a heating water bath (optional). Vacuum distillation of the solvent at high and low temperature is achieved quickly and efficiently by using a variable speed motor, which prevents the formation of foam and liquid shocks (solvent) in the evaporation flask and also distillation under controlled atmosphere. The evaporation flasks are pear-shaped to give a large evaporation surface and are attached to a glass duct that passes through the drive unit and protrudes about 120 mm into the condenser. The condenser is equipped with standard bonding at the top and bottom for receiver flask. The unit is equipped with a quick-acting connector.