What Is A Rotary Evaporator?

A rotary evaporator is a device commonly used in chemical laboratories. In recent decades, the invention has been extended even to the cooking industry. The use of the rotary evaporator in experimental instruments and modern culinary is nowadays becoming popular.


The rotary evaporator has different parts. These include an evaporation bottle, an S-shape condenser, a motor, a collection bottle, and a bath among others. The evaporation bottle links to the decompression pump through a capacitor. The other open part of the reflux condenser connects to a collection bottle.


The main functions of the rotary evaporator are:

  • Evaporation
  • Concentration
  • Crystallization
  • Drying
  • Separation
  • Solvent recovery

How it Works

This device rotates and forms a film. The film helps to speed up the evaporation rate under negative pressure conditions and constant temperature heating. With the mechanism of separation and purification, the solvent gets recovered by condensing the tube. The transfer solvent is then removed from the condensing flask using the three-way piston in between the vacuum pump and the condensing pipe. When the system connects with the vacuum pump, the system adopts a low-pressure state.

The Applications Of Rotary Evaporator

Rotary evaporators are used in a wide range of applications, from kitchens, laboratories, and even kitchens. They also come in many different models. Customers can choose the model that best suits their needs. Some of its uses include:

  • It is used in chemical laboratories to remove solvents from samples by the evaporation process efficiently
  • They are used to receive evaporated organic solvents.
  • They are used to allow distillation of large amounts of volatile solvents
  • It is used in the production process of chemicals, pharmaceuticals, biological products, and many other industries.
  • They are used in a wide variety of teaching experiments in the lab.