Application and Principle of Rotary Evaporator _ Boiling Point _ Solvent _ Liquid

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Original Title: Application and Principle of Rotary Evaporator Rotary evaporator is a widely used evaporation instrument in laboratory, which is suitable for reflux operation, rapid evaporation of large amounts of solvents, concentration of trace components and reaction processes requiring stirring. The rotary evaporator system can be hermetically depressurized to 400 to 600 mm Hg; the solvent in the distillation flask is heated with a heating bath The heating temperature can be close to the boiling point of the solvent, and the rotation can be carried out at the same time. ? The speed is 50 ~ 160 rpm to make the solvent form a thin film and increase the evaporation area. In addition, under the action of the high-efficiency cooler, the hot steam can be quickly liquefied and the evaporation rate can be accelerated. Application and principle of rotary evaporator. How does the rotary evaporator work? Rotary evaporator is mainly used to continuously distill large amounts of volatile solvents under reduced pressure. In particular, the reaction product can be separated and purified by concentrating the extract liquid and distilling the receiving liquid during chromatographic separation. Its basic principle is vacuum distillation. Generally speaking,wiped film evaporator, the "boiling point" of liquid refers to the temperature when its vapor pressure is equal to the external pressure, so the boiling point of liquid will change with the change of external pressure. If the pressure in the system is reduced with the help of vacuum pump, the boiling point of liquid can be reduced. In this way,cbd crystallization equipment, substances that are thermally decomposed, oxidized, or polymerized before they reach the boiling point during atmospheric distillation can be distilled before decomposition. As for "rotation", it means that the distillation flask containing the sample solution is rotated during the distillation process, which can make the solvent form a thin film and increase the evaporation area. In addition, under the action of high efficiency cooler (usually condenser tube), rotary vacuum evaporator ,wiped film distillation, the hot steam can be quickly liquefied and the evaporation rate can be accelerated. Can a rotary evaporator be used for distillation? The rotary evaporator mainly uses the different boiling point properties of liquids to separate them. Uch as separating water from acetone. Different from the ordinary evaporator, the rotary evaporator does not involve the process of "boiling", and the solution components can be collected smoothly. Of course, its use of depressurization, low temperature evaporation of the general evaporator can also be done. Distilled water has a special instrument for making distilled water. The principle seems to be ion exchange, which can obtain deionized water with high purity. If it is a special device for distilled water, it is also available. Relatively speaking, the structure is relatively simple, and the price is much cheaper than that of the rotary evaporator and the water purifier. This apparatus is also sometimes used to purify deionized water to obtain redistilled water. Distilled water is generally not produced by rotary distillation. Evaporator is used in laboratory research, chemical production, laboratory testing, medical testing and other aspects. It is an essential instrument for evaporation, concentration, crystallization, drying, separation, solvent recovery and other processes in the scientific research and production process of pharmaceutical, chemical, biological products and other industries. Under the negative pressure of the rotary evaporator, the evaporation bottle rotates in the thermostatic water bath, and the solution forms a thin film on the bottle wall to increase the evaporation area. Fficiently evaporating at low temperature,50l rotovap, condensing, recovering, concentrating and separating materials. Return to Sohu to see more Responsible Editor:.