The pressure required for rotary evaporation of ethyl acetate is approximately 117 mbar at a vapor temperature of 30°C.
This value is derived from the principle that the boiling point of liquids decreases with a reduction in pressure.
This allows for the evaporation of solvents at lower temperatures.
4 Key Points Explained: What is the Pressure of Rotary Evaporator for Ethyl Acetate?
1. Principle of Rotary Evaporation
Rotary evaporators work by reducing the pressure inside the system.
This lowers the boiling point of the solvent.
It is crucial for efficiently evaporating solvents at lower temperatures.
This prevents degradation of heat-sensitive compounds.
2. Application to Ethyl Acetate
Ethyl acetate is a low-boiling solvent with a normal boiling point of about 77°C at atmospheric pressure.
To evaporate ethyl acetate using a rotary evaporator, the pressure needs to be reduced.
This facilitates evaporation at a lower temperature, typically around 30°C.
3. Calculating the Pressure
The pressure required can be estimated based on the boiling point of ethyl acetate at 30°C.
Although specific data for ethyl acetate at 30°C is not provided in the reference, a similar approach used for ethanol can be applied.
For ethanol, boiling at 30°C requires a pressure of 123 mbar.
Assuming a similar pressure reduction for ethyl acetate, a pressure of around 117 mbar (estimated from general solvent behavior) would be suitable for evaporating ethyl acetate at 30°C.
4. Operational Considerations
When using a rotary evaporator, it is important to maintain a constant pressure.
This avoids bumping or sudden changes in distillation rates.
Automation and interface-controlled systems can help in maintaining consistent pressure values.
This ensures efficient and safe evaporation of ethyl acetate.
In summary, for the efficient and controlled evaporation of ethyl acetate using a rotary evaporator, a pressure setting of approximately 117 mbar at a vapor temperature of 30°C is recommended.
This is based on the principles of reduced pressure and lower boiling points.
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