What's the Best Combination I Could Use for Rotary Evaporator
Time：
2025-12-13 15:52
Of courese, they're our LICHEN Scientific Vacuum Pumps, Recirculatin Chillers, or Cold trap.
A rotary evaporator (Rota-vap, Roto-vap) is an esssential equipment in chemical laboratories, consisting of a rotary motor, sealing ring, vacuum pump, heating bath, distillation flask, condenser, and other components. It is primarily used for the continuous distillation of large quantities of volatile solvents under negative pressure, especially for the concentration of extracts and the distillation of receiving liquid during chromatographic separation, enabling the separation and purification of reaction products.
The distillation flask is a pear-shaped or round-bottomed flask with a standard ground joint, connected to a vacuum pump via an efficient serpentine reflux condenser. The other end of the condenser is connected to a receiver flask to collect the evaporated and then condensed solvent.
There is a three-way stopcock between the condenser and vacuum pump. When the system is connect to the air, the distillation flask and receiving flask can be taken down to transfer the solvent. When the system is connected to the vacuum pump, the rotary evaporator is under negative pressure state. During operation, reduce the pressure first before rotate distillation; at the end, power off first before venting gas to prevent the distillation flask from detaching. As a heat source for distillation, it is often equipped with a thermostatic water bath.
How to Choose a Suitable Rotary Evaporator?
Before purchasing a rotary evaporator, ask yourself some questions, such as: What is the single distillation volume? Approximately how many samples need to be distilled daily? What solvents will be distilled? What is the boiling point range of the solvents? Are there any flammable, explosive, or toxic solvents? etc. After confirming these questions, proceed to select a rotary evaporator based on experimental requirements and the solvents to be distilled.
Specifications of Rotary Evaporators
They are typically differentiated by the capacity of the distillation flask, required depends on the quantity of samples to be evaporated. Generally, 2L/3L/5L rotary evaporators are suitable for small-scale laboratory experiments; 5L/10L/20L are suitable for pilot-scale applications; 20L/50L are suitable for pilot-scale and production-scale applications. LICHEN rotary evaporators offer multiple specifications ranging from 3L to 50L, providing a wide selection for various laboratory needs. In special cases, the capacity of the evaporation flask can be expanded by using a continuous feed tube, thereby increasing the single continuous distillation volume to a certain extent.
Distillation Efficiency
The distillation efficiency of a rotary evaporator determines the number of samples that can be distilled daily. For the same solvent, higher distillation efficiency means more samples can be distilled. If your sample volume is large, careful consideration of distillation efficiency is necessary when selecting a rotary evaporator.
Safety Risk Assessment
The safety risks of distillation mainly come from the solvents and heating medium used. If the heating medium is silicone oil, its flash point should be at least 25°C higher than the maximum temperature of the heating bath. For solvents with flammable or explosive properties, choose explosion-proof glass components. Automatic venting after distillation is preferable to avoid rapid manual venting, which could cause explosions. To optimize the laboratory environment, a secondary condensation device like Cold Trap can be selected to maximize the recovery of distilled solvents.
concentration,rotary evaporator,chemical laboratories,distillation
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