Rotary evaporator is a widely used evaporation instrument in laboratories,Suitable for reflux operations, rapid evaporation of large amounts of solvents, concentration of trace components, and reaction processes that require stirring. The rotary evaporator system can be sealed and depressurized to400~600Millimeter mercury column;Heat the solvent in the distillation flask with a heating bath, and the heating temperature can be close to the boiling point of the solvent;At the same time, it can also rotate at a speed of50~160turn/Separate the solvent to form a thin film and increase the evaporation area. In addition, under the action of an efficient cooler, hot steam can be rapidly liquefied, accelerating the evaporation rate. The application and principle of rotary evaporator.

The above is the principle,How does it work now?

Rotary evaporator is mainly used as an instrument for continuously distilling a large amount of volatile solvents under reduced pressure conditions. Especially for the concentration of extraction liquid and distillation of the receiving liquid during chromatographic separation, reaction products can be separated and purified. Its basic principle is vacuum distillation. The "boiling point" of a liquid generally refers to the temperature at which its vapor pressure equals the external pressure,Therefore, the boiling point of a liquid will change with the external pressure. If a vacuum pump is used to reduce the pressure inside the system, the boiling point of the liquid can be lowered. This way, substances that do not reach their boiling point during atmospheric distillation and will undergo thermal decomposition, oxidation, or polymerization can be distilled out before decomposition. As for "rotation", it refers to the distillation flask containing the sample solution rotating during the distillation process, which can cause the solvent to form a thin film and increase the evaporation area. Additionally, in high-efficiency coolers(Usually it's a condenser tube)Under the action, the hot vapor can be rapidly liquefied, accelerating the evaporation rate.

Can a rotary evaporator be used for distillation?

The rotary evaporator mainly utilizes the different boiling point properties of liquids for separation. For example, separating water from acetone.

Different from ordinary evaporators, rotary evaporators do not involve the process of "boiling",The components of the solution can be collected smoothly. Of course, the evaporator used for pressure reduction and low-temperature evaporation can also achieve this. There are specialized instruments for producing distilled water,The principle seems to be ion exchange, which can obtain highly pure deionized water.

There are also devices specifically designed for distilling water. Relatively speaking, the structure is relatively simple and the price is much cheaper than rotary evaporation and pure water purifiers. This device is sometimes used to purify deionized water to obtain re distilled water. Generally, rotary distillation is not used to make distilled water.

Evaporator is an instrument and equipment used in laboratory research, chemical production laboratory testing, medical inspection, and other industries such as pharmaceuticals, chemicals, and biological products for processes such as evaporation, concentration, crystallization, drying, separation, and solvent recovery. Rotating steaming Under negative pressure conditions, the evaporator bottle rotates in a constant temperature water bath,Solution on the bottle wall.Forming a thin film on top,Increase the evaporation area. Efficient evaporation at low temperatures, condensation recovery, concentration and separation of materials.