How to choose a small laboratory rotary evaporator？
is a kind of evaporation instrument widely used in the laboratory. It is suitable for reflux operation, rapid evaporation of a large number of solvents, concentration of trace components, and reaction processes that require stirring. The rotary evaporator system can be sealed and decompressed to 400 to 600 mm Hg; the solvent in the distillation flask is heated by a heating bath, and the heating temperature can be close to the boiling point of the solvent; at the same time, it can be rotated at a speed of 50 to 160 rpm, The solvent is formed into a thin film, and the evaporation area is increased. In addition, under the effect of the cooler, the hot vapor can be quickly liquefied, which accelerates the evaporation rate.
Rotary evaporator is a new type of evaporator that is forced to form a film by a rotary scraper and can perform falling film evaporation under vacuum conditions. It has a large heat transfer coefficient, high evaporation intensity, short over-current time, and large operating flexibility. It is especially suitable for thermal sensitivity. Evaporation, concentration, desolvation, and distillation of materials, high-viscosity materials, and easily crystallizable particles. So it is widely used in chemical, pharmaceutical, pesticide and other industries.
What should I pay attention to when I buy a rotary evaporator? When we talk about how to choose a rotary evaporator, first we look at the main parameters of the rotary evaporator.
(1) There are so many different types of rotary evaporator capacity: 1L, 2L, 3L, 5L, 10L, 20L, 50L and 100L
(2)Laboratory rotary evaporator
lifting method is divided into manual and automatic, and automatic lifting is also divided into: water bath automatic lifting and evaporation bottle automatic lifting, automatic lifting is mainly for those who use frequently, automatic lifting saves a bit of effort, in fact, water bath Benefits of pot lifting: it can protect the evaporation bottle, the glass shaft is not easy to damage, and manual lifting is economically cheaper than manual lifting
(3) Look at the degree of sealing, that is, the degree of vacuum. The higher the degree of vacuum, the faster the evaporation rate. Generally, the degree of vacuum can reach 0.095mpa. Generally, 2L5L can be equipped with SHB-III circulating water pump and SHB- B circulating water pump, the degree of vacuum is also closely related to the seal ring. Generally, the quality of the seal ring is better and it is more resistant to corrosion, so that any flux will not affect the vacuum pump. And the service life is relatively long.
(4) Secondly, whether the appearance is good or not is also very important, and many users will look at the appearance. This depends on personal aesthetics. If you like the appearance, I suggest that customers can buy Shanghai Yarong products, the overall appearance More humane
The rotary evaporator is developed by applying the principle of constant temperature heating and thin film evaporation under vacuum negative pressure. The rotary evaporator is controlled by an imported frequency converter. The stepless speed regulation allows the glass rotary bottle to rotate at a constant speed, and the material forms a large area uniform film on the bottle wall. The rotary bottle is evenly heated by a controllable thermostatic water bath. Under the system vacuum condition Evaporate at high speed, and the solvent vapor is cooled by the glass double condenser and recovered in the collection bottle. The instrument is also provided with a feeding interface and a discharging mechanism, which facilitates automatic and continuous work during the evaporation process.