Molecular sieves

[amateur23]

Hello

I have read quite a lot about the use of molecular sieves for drying solvents. I noticed that most commonly people say the solvent should be left over molecular sieves for 12/24 hours. However, I would need to leave it for a week. Does anybody know if that would (somehow) affect my solvent? I would imagine it shouldn't be a problem since many solvents are normally sold over molecular sieves. However, I might be wrong - perhaps the procedure is different when you need to do it yourself. Any suggestions?

Thanks

[Steve Reimer]

When I dried solvents over mole sieves I normally just left them in the container. sometimes for months. I observed no problems from the procedure. At the time, 30 years ago, I was doing synthesis so your requirements may vary.