A rotovap, or rotary evaporator, is a device used in laboratories and industries for the efficient and gentle removal of solvents from samples through evaporation.
The size of a rotovap refers to the size of the evaporating flask, which determines how many liters of solvent can be recovered.
Traditionally, large-scale rotovaps come in sizes such as 10 L, 20 L, and 50 L.
These are suitable for commercial production in industries like cosmetics and pharmaceuticals, offering high throughput and scalability.
Large rotovaps require a heavy-duty pump and chiller due to the larger size of the condensers, making them unsuitable for dry ice cooling.
For smaller benchtop setups, rotovaps are available in sizes ranging from 2 to 10 liters.
These are commonly used in medical and pharmaceutical fields for testing purposes.
They are also suitable for small-scale distillation.
When selecting a chiller for a rotovap, it is important to ensure that the temperature ratings of the chiller match the requirements of the heated bath of the rotovap.
The cooling power of the chiller should also be sufficient to handle the maximum bath temperature of the rotovap.
Rotovaps can come with different features and styles to cater to specific needs.
They can have water or oil baths, with water baths being more economical and oil baths offering superior temperature stability and RPM management.
Some rotovaps are equipped with pre-heat coils to warm the solution before it enters the flask, reducing the load on the evaporation flask.
Motorized flask lifting is also available to easily adjust the height of the evaporating flask.
Most rotovaps come with glass condensers for volatile solvents, as there will be no chemical reaction.
However, for large-scale producers working with non-volatile solvents, stainless steel tube-in-shell condensers are an option.
These stainless steel condensers are less common but significantly increase the recovery rate and speed of the process.
In summary, the size of a rotovap is determined by the size of the evaporating flask, with common sizes being 5 L, 10 L, 20 L, and 50 L.
The choice of size depends on the volume of solvent that needs to be recovered.
Large rotovaps are suitable for commercial production, while smaller benchtop setups are used for testing and research purposes.
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