How to connect rotary evaporator with vacuum controller and vacuum pump

The working principle of the rotary evaporator is based on the concept of vacuum distillation. The liquid sample is put in a rotating flask, which rotates in a heating bath. The centrifugal force generated by the rotation makes the liquid evenly distributed on the inner wall of the flask, thereby increasing the surface area of the liquid and accelerating the evaporation process. Meanwhile, the pressure in the system is reduced by the vacuum pump connected to the system, thereby reducing the boiling point of the liquid, so that evaporation is carried out at a lower temperature, reducing the damage to heat-sensitive substances.

The vacuum rotary evaporator continuously distills a large amount of volatile solvents under reduced pressure to achieve the purpose of separation and purification. So, how to connect the rotary evaporator with vacuum controller and vacuum pump? The vacuum controller is connected between the rotary evaporator and the vacuum pump in series. When using a rotary evaporator, if the vacuum degree is not appropriate, the reagent will boil suddenly and violently. By using a vacuum controller in series with the rotary evaporator, the internal vacuum degree of the rotary evaporator can be accurately controlled, especially for the concentration of volatile reagents, to obtain the maximum and most ideal recovery rate. It is also widely used in the reduced pressure distillation of organic reagents, for the gradual control of the vacuum degree, and the gradual extraction of solvents.

The laboratory rotary evaporator is an essential basic instrument for concentrating, drying and recovering products in R&D and analytical experiments. It is mainly used to evaporate and concentrate liquid samples efficiently, especially when dealing with large amounts of solutions or when solvents need to be removed to obtain concentrated extracts.