LD5050
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Cleaning molecular sieves?
I have some molecular sieves, some where used for drying EtOH, some drying ether and some drying DCM I was wondering if I could use these sieves for
drying other reagents now that they have already been used without risk of contamination. Should I somehow wash them first then dry in oven?
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Texium
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Just drying them in the oven should be fine since you used them with volatile solvents. To test if they're dry, just take a sieve from the oven, allow
it to cool in a dry place, and place it in the palm of your hand. Add a few drops of water, and it should heat up noticeably. If it doesn't, they need
more time in the oven.
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unionised
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Don't put flammable solvents in the oven.
It's a good idea to leave the used stuff exposed to air, outside or somewhere well ventilated for a while, then soak it with water and let it dry in
air before slowly drying in an oven.
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