Author Topic: Mole Sieves  (Read 448 times)

0 Members and 1 Guest are viewing this topic.

Buster_Hymen

  • Guest
Mole Sieves
« on: May 28, 2003, 07:30:00 AM »
Can you tell visually if mole sieves are saturated with water?



Some of the 3Å sieves in the above image have turned a darker color than the others. Does this mean they are loaded up and no longer pulling water from the solvent?

And if you can't tell visually when they are past their prime, what is the general rule of thumb re: their use?

Can I bake them in the oven to drive the water out, and re-use them? If so, what temp., and for how long?

Thanks.

murmur

  • Guest
Regeneration of molecular sieves
« Reply #1 on: May 28, 2003, 09:05:00 AM »
To regenerate MS heat up it to 250 °C for 2 hours

Chimimanie

  • Guest
microwave
« Reply #2 on: May 28, 2003, 06:39:00 PM »
When I put 4A molecular sieve in the MW oven, they melt, and glow orange after 1 min 30! The heat they generate even broke the flask!

It was Hest who said to put them in MW until they melt....

Its really impressive to say the least! 8)