Rotary evaporator is mainly used in the laboratory, such as motor, distillation bottle, heating pot, condenser tube and other parts.
Structure of the rotary evaporator: The distillation flask is a pear-shaped or round-bottomed flask with a standard ground port, connected to a pressure reducing pump via a highly refluxing serpentine condenser, and another opening of the reflux condenser with a grinding port. A receiving flask is connected for receiving the evaporated organic solvent. There is a three-way piston between the condensing pipe and the decompression pump. When the system is connected to the atmosphere, the distillation flask and the liquid-receiving flask can be removed and the solvent is transferred. When the system is connected with the decompression pump, the system should be reduced. Pressure state. When using, depressurize first, then start the motor to rotate the distillation flask. At the end, stop the machine and then pass the atmosphere to prevent the distillation flask from falling off during rotation. As a heat source for distillation, it is often equipped with a corresponding constant temperature water tank.
Principle: By electronically controlling, the flask is rotated at a constant speed at the most suitable speed to increase the evaporation area. The evaporation flask was brought to a negative pressure by a vacuum pump. The evaporation flask was heated in a water bath while rotating at a constant temperature, and the solution in the bottle was subjected to heat diffusion evaporation in a rotating flask under a negative pressure.
Rotary evaporators are primarily used to continuously distill large amounts of volatile solvents under reduced pressure. In particular, the concentration of the extract and the distillation of the receiving liquid in the chromatographic separation can separate and purify the reaction product.
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