CHEM 3820 / Experiment 1: Schlenk Line

1. Turn on vacuum pump.

2. Apply two lines of silicone grease onto the inner joint of the solvent trap to seal the trap in place.

3. Attach the solvent trap and make sure to rotate it, evenly spreading the grease.

4. Attach Keck clip and loosely clamp the cold trap.

5. Close the air bleed and put the system under vacuum. This tap should be tight to avoid air being sucked into the line. Pressure drop should drop.

6. Hold the dewer against the bottom of the trap and place the lab jack underneath. Leave a small gap between dewer and the trap.

7. Pour the liquid nitrogen into the dewer slowly to avoid it spilling. Dewer must be totally filled for proper cooling.

d

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d