Using a rotary evaporator is a crucial step in many processes because it allows you to gently yet effectively remove solvent from your sample. In some cases, evaporation rate is not an issue, such as when you are evaporating very little solvent or time is not a concern. However, in most cases you want the process to be as fast as possible, especially if you are running the application multiple times in a row or processing a large number of applications.
Four main ways to speed up the carousel spreading process:
– Increase the size of the evaporating flask.
– Increase the rotation speed of the evaporating flask.
– Increase the temperature of the rotary evaporator water bath.
– Increase vacuum level.
1. Increase the size of the evaporation flask
It is known that the rotary evaporator flask should not be filled more than half full, both to prevent spillage and to provide sufficient liquid surface area for efficient evaporation. Therefore, this must be considered when we choose the rotary evaporator capacity.
For laboratory research, it is more economical and practical to choose a small rotary evaporator. But I would also say that if you want to create a more efficient rotary evaporator, bigger is generally better. Since the larger flask has a larger surface, this puts more of the flask in contact with the water/oil bath, allowing the sample to heat more evenly and faster.
Simply put, a larger flask will expose the surface of the sample to the air inside the flask, ultimately making the evaporation process more efficient.
The rotary evaporator is very easy to expand, with a capacity range of 0.5L~100L, and the flexible design makes the rotary evaporator very adaptable when handling Cbd oil. Hotsale 100L Rotary Evaporator for the Cannabis Oil Industry.
2. Increase the rotation speed of the evaporation bottle
Increasing the rotational speed of the flask improves heat transfer to the flask and solvent and increases the surface area of the liquid within the flask, thereby increasing the evaporation rate.
Most customers always think faster is better, but please be aware of turbulence
For liquids, too fast a speed will not only reduce evaporation efficiency;
Rotary evaporator premature wear.
It is recommended that the distillation bottle be rotated at 150-200rpm (rotation will vary for different capacities)
evaporator and different samples), which will increase the surface area of the solution and enhance the solvent
Evaporation rate.
3. Increase the bath temperature of the rotary evaporator
CBD extract itself requires a lower water bath temperature to minimize thermal decomposition, so it is important not to raise the rotary evaporator bath temperature too high and too fast.
If you set the temperature too high, the evaporation temperature also depends on the cooler you use.
Will increase your evaporation rate so that the cooler can't keep up.
Therefore, we can slowly heat the rotary evaporator bath, 30-40℃ is recommended, and the condenser temperature controlled by the low-temperature circulating bath cooler can be set from -10℃ to 0℃.
4. Improve vacuum degree
Using a vacuum pump can reduce the pressure in the rotary evaporator and reduce the solvent/
The boiling point of ethanol allows the solvent removal/ethanol recovery process to be completed at a lower temperature to protect CBD
oil and can speed up evaporation.
