When using the vacuum pump must pay attention to the following points:
1. Absorption equipment must be installed between the distillation system and the vacuum pump.
2. Before distillation, the steam of organic solvent in the system must be pumped thoroughly.
3. If you can use the pump to pump, then try to use the pump, such as distillation of substances containing volatile substances, can be used to pump pressure relief, and then switch to the pump.
4. The pressure reducing system must keep airtight, all the rubber plug size and the pore canal to be suitable, the rubber tube must use the vacuum rubber tube. Grinding glass coated with vacuum grease.
