Prasad Lab Equipment

A Vacuum Rotary Evaporator (often referred to as a Rotovap) is a laboratory instrument designed to efficiently and gently remove solvents from a liquid sample through evaporation under reduced pressure. This process is particularly useful for heat-sensitive compounds, as the vacuum reduces the boiling point of the solvent, enabling evaporation at lower temperatures.

Key Components of a Vacuum Rotary Evaporator:

1. Rotary Flask:

   • The container where the liquid sample is placed. It rotates during operation, creating a thin film of the sample, which increases the surface area and enhances evaporation efficiency.

2. Motorized Rotating Mechanism:

   • The rotary flask is connected to a motor that rotates the flask at a constant speed. This rotation helps spread the liquid evenly on the surface, improving the evaporation process.

3. Vacuum System:

   • A vacuum pump is used to lower the pressure inside the system, reducing the boiling point of the solvent. This allows the solvent to evaporate at lower temperatures, which is essential for preserving heat-sensitive compounds.

4. Heating Bath:

   • The heating bath (water or oil) provides the necessary heat to the liquid sample. The bath is typically heated to a controlled temperature to ensure that the solvent evaporates efficiently while maintaining the integrity of the sample.

5. Condenser:

   • The condenser cools the vaporized solvent, turning it back into liquid form. A cooling system, such as circulating cold water or coolant, runs through the condenser to maintain a low temperature.

6. Receiving Flask:

   • The condensed solvent is collected in the receiving flask, which is positioned at the end of the condenser. The recovered solvent can be reused or disposed of, depending on the application.