In chemical synthesis experiments, rotary evaporators are often used for solvent recovery and product concentration treatment. By setting appropriate parameters such as rotation speed, heating temperature, and vacuum degree, excess solvents in the reaction system can be efficiently removed and high-purity products can be obtained. In the field of biomedicine, rotary evaporators are commonly used for solvent removal and sample concentration during drug purification and refining processes.

The working principle of the laboratory rotary evaporator is based on the principles of evaporation and condensation in physics. Under the combined action of heating and rotation, the solvent inside the evaporation bottle gradually heats up and evaporates into steam. The steam is cooled and re condensed into liquid in the condenser, and then flows into the collection bottle. At the same time, the vacuum system continuously extracts air from the system, reducing the pressure inside the system, allowing the solvent to reach its boiling point and evaporate rapidly at lower temperatures.

matters needing attention

The rotary evaporator should be operated in a fume hood to avoid harm to experimental personnel caused by solvent vapor.

During the operation, safety should be taken into account to avoid potential hazards caused by high temperature and vacuum.

Regularly maintain and upkeep the equipment to ensure its normal operation and extend its service life.

The rotary evaporator heats the solvent to boiling state through a heater. The evaporator bottle rotates above the heater to evenly heat the solvent during the evaporation process and help improve the evaporation efficiency. Rotation also causes the liquid sample to form a liquid film on the inner surface of the evaporation bottle, increasing the heating area. Under the combined action of heating and rotation, the solvent gradually evaporates to form steam. The steam is cooled by a condenser and re condensed into liquid, which is collected in a collection bottle. The vacuum pump extracts the air from the system, reduces the system pressure, and further improves the evaporation efficiency.