Short-range molecular distillation procedures

Operation procedure: 1, install the injector (clockwise tighten the sampler), the first, second and third stage receiver bottles, open the cooling water circulation button; 2.
Open the wiper rotor and adjust it to the finger * speed (not more than 400 r/min); 3.
Open the vacuum pump after the liquid nitrogen reaches the required liquid level (not less than 1/2 of the volume of the condensing column); 4.
When the pressure no longer drops, adjust the vacuum pump fine-tuning valve (not less than 0.
5 mbar); 5.
After the pressure adjustment is in place, rotate the injector valve counterclockwise to adjust the injection speed; 6.
During the operation of the equipment, the feed liquid can be added at any time through the injector; 7.
When the liquid volume in the injector remains about 50 ml and is no longer injected, close the vacuum pump, call back the fine adjustment valve, wait for the pressure to show to 1000 mbar, wait for 10 min, wait for the pressure to be discharged, close the heater, remove the injector, pour out the remaining sample solution, and replace it with absolute ethanol; 8.
Replace the first and second stage receiving bottles, load the empty bottles, unscrew the injector, slowly inject anhydrous ethanol, and borrow waste heat to clean the equipment; 9.
After cleaning, close the cooling water and rotor, remove the injector and receiver bottle and wash it separately; 10.
Turn off the power and clean the countertop
.