Introduction
The rotary evaporator can be used to recover and evaporate organic solvents. It uses a motor to drive the distillation flask to rotate. Since the distiller is constantly rotating, the zeolite can be eliminated without bumping. At the same time, due to the continuous rotation, the liquid is attached to the wall of the distiller to form a liquid film, which enlarges the evaporation area and accelerates the evaporation speed. Note when using:
(1) During vacuum distillation, when the temperature is high and the vacuum is low, the liquid in the bottle may bump. At this time, the vacuum should be lowered in order to perform the distillation smoothly.
(2) When stopping evaporation, first stop heating, then stop vacuuming, and finally cut off the power to stop the rotation [1].
Pictures
Structure principle
Structure: The distillation flask is an eggplant-shaped or round-bottomed flask with a standard ground mouth interface. It is connected to a pressure reducing pump through a high reflux serpentine condenser tube. The other opening of the reflux condenser tube is connected to a receiving flask with a ground mouth. Used to receive evaporated organic solvents. There is a three-way piston between the condenser tube and the decompression pump. When the system is in communication with the atmosphere, the distillation flask and the wetted flask can be removed to transfer the solvent. When the system is in communication with the decompression pump, the system should be in decompression.压State. When using, the pressure should be reduced first, and then the motor should be turned on to rotate the distillation flask. When it is finished, the machine should be shut down first, and then the atmosphere should be vented to prevent the distillation flask from falling off during rotation. As a heat source for distillation, it is often equipped with a corresponding constant temperature water tank.
Instructions
⒈Height adjustment: manual lifting, turning the hand wheel on the machine column, turning forward to rise, reverse turning to fall.
Electric lift, touch the up button, the host goes up, touch the down button, the host goes down.
⒉There are two external joints on the condenser for cooling water. One end is connected to the inlet water and the other end is connected to the outlet water. Generally, it is connected to tap water. The lower the temperature of the condensed water, the better. The upper port is equipped with a vacuum connector and connected to the vacuum pump hose Used for vacuuming.
⒊Turn the speed control knob to the minimum before starting the machine, press the power switch and the indicator light is on, and then slowly rotate to the right to the required speed. Generally, large evaporating flasks are used for medium, low speed and high viscosity solutions use lower speed. Flask It is the standard interface No. 24, and it comes with 500ml and 1000ml flasks. Generally, the amount of solution should not exceed 50%.
⒋When using, the pressure should be reduced first, and then the motor should be turned on to rotate the distillation flask. At the end, the motor should be stopped and the atmosphere should be vented to prevent the distillation flask from falling off during rotation.
