Just curious what the drawbacks are to this method of recovery as I’ve seen it discussed a little here and there. Currently operating small scale and would like an intermediary option for recovery for a while before going rotovap. My circulator is regrettably not a chiller (Fischer Isotemp 3028HD) but of course I am operating a cold trap and I do have access to a diaphragm pump. What would a procedure with this equipment look like? Should I be concerned about volatiles recovered along with the ethanol?
You can but it won’t be as dialed in and painfully slow. Just dump ice blocks in a cooler and circulate through the condenser
Buy a alcohol distiller for $125 and recover a gallon every 4 hours. That’s better than what your proposing.
Just a typical stainless steel still would really do the trick? I just need something to work for me for a little while before I can finance a rotovap. Looking at Chinese models, are there decent options for under $2k?
I was gonna get this, lol and upgrade it with a coil condenser
same boat as you, brother.
I did this same thing then immediately upgraded to a frenkenstein buchi I found online. I think I have 1k into my 3l buchi now with a Dewar dry ice condenser and an Aldrich super coil condenser. A 5L re-501 China roto should be about 1k shipped I think
Chinese are Ok but so are used
What volume do You Need to Evaporate ?
O and for a chiller i often. Use one of these iT s t
That vigreux column will slow down your recovery and is completely unnecessary. Other than that though, that’s pretty much what I’m rocking until I can order a roto.
Edit: I recommend a sep or addition funnel with a ground glass joint and claisen adapter, along with another 1l (prefferably 2l) round bottom flask for the collection vessel. It makes adding tincture to the BF a breeze. That and the larger receiving flask will make it so you don’t have to break vacuum so often to add tincture or empty receiving flask.
Probably about 5L is what I’m thinking. 5-10ml ethanol per gram of crude for my 1-2L setup.
lookup DIY window ac glycol chiller
Also what @coppertop says, a claisen is all thats needed for the distillation really.
You. Need reflux to make 96% etho
So a real vigreu or a higher head
Your evaporated azeotrope ethanol Will be less then 96% in a short path
Depending on the amount of water in the solution
i would say reproofing is a whole different ball game and should happen at a separate step from this one