chemrox - 22-9-2008 at 23:44
I made a liquid, aromatic with a halogenated side chain that boils around 230. There are an expected 200 ml of this product in about 2.5 L of MeCl2.
To separate I can either divide into aliquots and then use the flash evaporator or I can set up a 3 L still. Gone the first route once and it was
tedious. I had other things to do so it took a week to get it all down to the 183 ml I had left. I haven't tried the second approach. Awfully
tempting though. I don't think my product is particularly sensitive to heat. Maybe an atmosphere of N2 as a precaution?
Thanks for all advice, derisive or friendly.
CRX
Ephoton - 23-9-2008 at 00:10
what I would do for something like that is dry solution then setup with equalized drop
funnel then strip most of the dcm under atmospheric and the last bit under vacuum.
this way your always dealing with a small distillation that is continuously topped up as is needed.
I find it better to set the size of my glass on the end product rather than the beginning
solution when it comes to stripping solvents off oils.
Nicodem - 23-9-2008 at 00:24
What exactly is the purpose of this thread? I might be too dumb, but I fail to see what kind of a problem is being discussed.
DJF90 - 23-9-2008 at 01:20
I believe chemrox is asking for opinions on which method of separation would be best, flash evaporation in several aliquots or 3L distillation.
Personally I think Ephoton's idea of topping up with an addition funnel would be my route of choice.
Edit: Should possibly be in the short questions thread...
[Edited on 23-9-2008 by DJF90]
chemrox - 23-9-2008 at 22:38
sorry-should have been in short questions. That one got started while I was on sabbtical..thanks ephoton for a solution that is simple and effective