Which brand of domestic rotary evaporator and model are better

Key points for the selection of a rotary evaporator.

1.Specify the specifications of the rotary evaporator.

The size of the required evaporation flask depends on the quantity of the evaporated material, generally speaking, 2L, 3L, 5L rotary evaporator is suitable for laboratory small amount test; 5L, 10L, 20L are suitable for pilot test; 20L and 50L are suitable for pilot test and production. Of course, in special cases, the volume of the evaporation bottle can also be expanded with the help of continuous feed tubes, so as to expand the amount of a continuous distillation to a certain extent.

2.Define the required distillation tasks for the rotary evaporator.

Distillation efficiency. The distillation efficiency of the rotary evaporator determines the number of samples that can be distilled per day, and the higher the distillation efficiency with the same solvent, the more samples can be distilled. If the sample volume is large, you need to pay more attention to the distillation efficiency when choosing a rotary evaporator.

Security risk assessment.

The safety risks of distillation are mainly due to the solvent and heating medium used for distillation.

1) If the heating medium is silicone oil, the ignition point should be at least 25°C higher than the maximum temperature of the heating pot.

2) If the distillation solvent has flammable and explosive properties, the explosion-proof glass component is optional, and the distillation is over, and it is best if the instrument can automatically deflate the distillation, so as not to manually deflate too quickly and cause **.

3) Optimize the laboratory environment, and the secondary condensing device can be selected to maximize the distillation solvent.

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Rotary Evaporator** Cheap products may have some problems with use, but are still available overall.

A rotary evaporator is a common laboratory instrument used to prepare thin films or to study the surface properties of materials before code combustion. **Different evaporators, the main segment key difference is in the quality and performance of the equipment. **Cheap rotary evaporators may have some usage problems, such as unstable speed, uneven heating, poor sealing performance, etc.

However, if the user is able to pay attention to these problems during operation, make appropriate adjustments and maintenance, and still obtain reliable experimental results.

In order to ensure the normal use of the rotary evaporator, it is recommended to choose a regular manufacturer or sales channel before purchasing, try to buy reliable quality products, and also refer to it by querying relevant product information and user evaluation. When making late clearing, it is necessary to operate in strict accordance with the operating instructions, pay attention to the adjustment and maintenance of the equipment, and avoid unnecessary damage and waste.

In addition, if the user has the conditions, you can also consider choosing some medium-sized rotary evaporators, the quality and performance of these devices are relatively more stable, and they are more convenient and reliable to use.

In short, although there are some problems with the cheap products of rotary evaporators, as long as you pay attention to operation and maintenance when using, you can still get reliable experimental results. If the experimental requirements are high, you can choose some medium-sized equipment to ensure the effect of the experiment.