1. Vacuum pumping
After opening the vacuum pump, it is found that the vacuum can not be checked. It should be checked whether the bottle mouth is well sealed, whether the vacuum pump itself leaks, whether the sealing ring at the shaft is placed intact, and a vacuum switch connected in the external vacuum tube can improve the recovery rate and evaporation speed. The feeding utilizes the system vacuum negative pressure, and the liquid material can be sucked into the rotating bottle by the hose at the feeding port, and the liquid material should not exceed half of the rotating bottle. The instrument can be continuously fed. Pay attention when feeding. 1. Turn off the vacuum pump 2/stop heating. 3. After the evaporation stops, slowly open the tube cock to prevent backflow.
2. Heating
The instrument is equipped with a specially designed water bath, which must be energized after adding water. The temperature control scale is 0-99 °C for reference. Due to the existence of thermal inertia, the actual water temperature is about 2 degrees higher than the set temperature. The set value can be corrected when used. For example, you need water temperature 1/3-1/2. Use the connector to remove the power plug.
3. Rotate
Turn on the electric control box switch and adjust the torque to the evaporation speed. Take care to avoid fluctuations in the water bath vibration.
4. Connect
Turn on the cooling water.
5. Recycling solvent
Turn off the vacuum pump, open the feed switch to deflate, and remove the solvent in the collection bottle.