What is the Purpose of a Rotary Evaporator?

What is the Purpose of a Rotary Evaporator?

As an essential separation equipment, a rotary evaporator can remove a volatile solvent from a liquid mixture through evaporation and condensation. In industrial field, people use rotary evaporators to extract cbd, which is the main component of mariguana. And cbd is usually used to be made into medicine in pharmaceutical field. In people’s daily life, rotary evaporators are used at home for extracting water from all kinds of juices, which makes juices have a better taste. In chemical and biochemical labs, rotary evaporators are used by professors to extract chemical substances, which will be further applied for other chemical purposes.

In recent years, the application of rotary evaporator has been extended to the cooking industry. Molecular cooking is a science that applies the principles of chemistry and physics to cooking. To some extent, molecular cooking has been promoted to be a proper term for describing innovative cooking styles. It is synonymous with cutting-edge technology and even psychology. The use of a rotary evaporator to non-heat evaporate liquid, thus retaining volatile aromatics that are easily lost by heating, is a perfect combination of modern culinary and experimental instruments.

Because of so many applications, a rotary evaporator has been quite well-received these days.

Rotary Evaporator

What is the Principle of a Rotary Evaporator?

The evaporation flask is an eggplant-shaped or round-bottomed flask with a standard grinding port. It is connected to a pressure-reducing pump through a highly refluxing serpentine condenser tube. The other opening of the reflux condenser tube is connected to a receiving flask with a grinding port. There is a three-way piston between the condenser tube and the vacuum pump. When the system is connected to the atmosphere, the evaporation flask and the liquid flask can be removed while the solvent is transferred. During the working process of rotary evaporator, the pressure should be reduced firstly, and then the motor should be turned to rotate the distillation flask. In the end, it should be shut down and then vented to the atmosphere to prevent the distillation flask from falling off during rotation.

Simple Structure of a Rotary Evaporator

A rotary evaporator consists of several parts, including rotary motor, evaporation tube, vacuum system, water oil bath, condensing tube, collection flask.

The evaporation flask is an eggplant-shaped or round-bottomed flask with a standard grinding port, which is connected to a pressure-reducing pump through a highly reflux serpentine condenser tube. There is a three-way piston between the condenser tube and the pressure-reducing pump. When the system is connected to the atmosphere, the evaporation flask and the liquid flask can be removed to transfer the solvent. 

What does Rotary Evaporator Mean?

A rotary evaporator is a device that is widely used to concentrate, separate, and purify materials. It can be used in many fields, including food-making field, pharmaceutical field, industrial field, chemical labs, people’s daily life at kitchen, and some other fields.

What are Advantages of a Rotary Evaporator?

  1. Every rotary evaporator has a motor, which can drive the rotary evaporator automatically go up and down.
  2. The liquid sample forms a liquid film on the inner surface of the evaporating flask with a large heating area, in order to accelerate the evaporation of sample materials.
  3. The power created by rotation of sample materials can suppression the boiling of the sample materials.

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