The rotary evaporator is mainly used for continuous distillation of large amounts of volatile solvents under reduced pressure conditions. Before choosing a rotary evaporator, ask yourself the following questions:

1. Clarify the specifications of the rotary evaporator

The specifications of rotary evaporators are usually distinguished by the volume of the evaporator bottle, and the size of the required evaporator bottle depends on the amount of evaporated material. Generally speaking, 2L, 3L, and 5L rotary evaporators are suitable for small-scale laboratory experiments; 5L, 10L, and 20L capacities are suitable for pilot testing; The 20L and 50L capacities are suitable for pilot testing and production. Of course, in special circumstances, the capacity of the evaporation bottle can be expanded by using a continuous feeding tube, which can increase the continuous distillation volume.

2. Clarify the distillation tasks required to be completed by the rotary evaporator

Distillation efficiency is crucial. The distillation efficiency of a rotary evaporator is the factor that determines the number of samples that can be distilled per day. Under the same solvent conditions, the higher the distillation efficiency, the more samples can be distilled. If the sample size is large, more consideration needs to be given to distillation efficiency.

3. Risk assessment

The risks of distillation mainly come from the solvents and heating media used in distillation.

1) If the heating medium is silicone oil, the ignition point should be at least 25 ° C higher than the higher temperature of the heating pot.

2) If the distilled solvent has flammable and explosive properties, explosion-proof glass components can be a good choice. After the distillation is completed, it is better if the instrument can automatically release gas to avoid explosion caused by manual release of gas too quickly.

3) Optimize the laboratory environment by selecting a secondary condensation device to maximize the recovery of distillation solvents.

4. After sales service

Due to the need to systematically consider key parameters such as vacuum degree, heating pot temperature, cooling medium temperature, and solvent properties that determine distillation efficiency when selecting a rotary evaporator, as well as assess laboratory risks and strengthen solvent recovery, if technical assistance is needed, please feel free to contact us at any time.