Supporting experiment of rotary evaporator and circulating water vacuum pump and cryogenic cooling circulating pump

Precautions and usage of the rotary evaporator :

First, safety instructions:

1. Before starting to use the instrument, please read the instrument manual attached to Lanfan Technology to familiarize yourself with the operation and performance of the instrument.

2. Make sure that the input voltage of the instrument is the same as the voltage indicated on the instrument. The power socket must be grounded.

3. Before starting the machine, pay attention to whether the heating temperature of the heating pot is reasonable. The safe temperature of the heating pot should be at least 25 °C lower than the burning point of the treated medium.

4. Do not operate the instrument in an explosive environment or under water.

5. To prevent the accumulation of pressure, the glass components should be kept ventilated when operating under normal pressure conditions (eg, not working).

Precautions and usage of the rotary evaporator:

Second, the reasonable use of heating and cooling media:

1. If the temperature of the heating pot is higher than 80 °C, it is recommended to use 50mpas silicone oil as the heating medium. Within 80 ° C, deionized water was used as the heating medium.

2. Inject 2/3 volume of deionized water or silicone oil (about 2L) into the heating pot to ensure that the heating medium of the heating pot is enough to submerge 2/3 of the evaporation bottle.

3. When the set temperature of the cooling circulation system is lower than 0 °C, the coolant can not be used directly. It is recommended to purchase the bath or homemade bath with the manufacturer, such as water and ethylene glycol.

4. Turn on the heating pot and cooling circulation system 30 minutes in advance.

5. Maintain a temperature difference of 50 °C between the cooling temperature and the temperature of the heating pot to ensure good cooling efficiency.

Precautions and usage of the rotary evaporator:

Third, do a good job of distillation:

1. Do not distill more than half the volume of the evaporation flask.

2. The glass evaporation bottle should not be heated on one side. During the heating phase, the evaporation bottle is turned on to avoid bumping.

3. According to the actual size of the evaporation bottle, preset the end point.

4. Make sure the bleed valve is closed .

5. Connect and fix the evaporation bottle with a clamp. After heating and cooling to the set temperature, start the vacuum pump and start distillation .

Precautions and usage of the rotary evaporator :

Fourth, daily maintenance and cleaning

1. Heating pot: use deionized water or low viscosity clean silicone oil, replace weekly

2. Glass components: glass grinding joints are cleaned with ethanol and vacuum grease every week.

3. Sealing ring: It is recommended to check the wear of the sealing ring every quarter (the vacuum value can be used to judge)

4. Host: keep the outer casing and panel dry

5. Cleaning: Disconnect the power when cleaning and maintaining the instrument. Use a surfactant-containing cleaner or use isopropyl alcohol to clean the inert stains.