Need Help Using Vacuum Chamber. Where does the ethanol go?

ohhhh I see my friend, I just wanna say that im really grateful that you are taking the time to reply to me on this sunday evening, thanks a lot !!

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Just wanted to make sure your vacuum chamber is rated for ethanol! Some acrylics don’t work well with ethanol and might degrade over time. Many off the shelf Chambers are sold to be butane/hydrocarbon compatible. Do you know what the lid of the chamber is made of?

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good point! I’d forgotten that part…

acrylic should work ok if you don’t splash too much ethanol on it. it will eventually craze and might even fail if you keep at it long enough.

I got away with DIY acrylic chamber lids for a year or so before getting an actual oven.

they definitely didn’t like it.

learning the right viscosity to load & the need to stage vac helped :wink:

Edit: I used 9" or 10" stainless cook pots sourced from the local thrift store & a chunk of 1.5" thick acrylic that looked to have been salvaged from a check cashing place (read “bullet proof” …ish). used the corresponding 9" or 10" Fagor pressure cooker gasket to provide the seal. Had 5 or 6 of the things at one point…

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Lol. Yah I was thinking about doing it with frying pans and stacking a bunch of them. Then putting little heat pads in-between each one.

Ovens easier :stuck_out_tongue:

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Damn are you serious ?? What happens if it does fall ? I really dont need any more accidents in my life, enough is enough, lol.

The lid I got is acrylic, its 3/4 inch thick,

To be honest I was really excited until I learned this vac chamber was just for purging and not for removing the ethanol at a faster rate, i thought it was going to be like a rotovap alternative, is this not the case ? I mean if I add a cold trap to the vac chamber and im able to recuperate most of the ethanol isnt it achieving the same purpose ?

I have noticed that the pump gets very hot very quick, I put a fan to blow air directly to it, is it ok to leave it running for 30-40 minutes even though its very hot ?? And the other thing i find weird is that when it achieves max vaccum the mist from the cap stops coming out, whats the reason for that ? is that normal ? I find it very weird.

Another thing I realized is that when I hit full vac I can turn off the pump and the oil keeps bubbling, am I still removing water from the oil even though the pump is off?? Or should I leave it on for the whole time?? I imagine that when the bubbling stops it means that there is no more water on it ? or could it keep on bubbling even though there is no more water in the oil ?

a roto vap, or well really, any quick solvent recovery system is utilizing the large surface areas of thin films of solution to increase the rate at which it evaporates. A vacuum chamber is no replacement for a rotovap, to speed up the process though put your extract in a larger dish, with more surface area. a beaker is going to be very limiting. you can add a cold trap if you want to recover your solvent otherwise its going to end on the floor under the pump.

The pump will get hot, and as long as it has oil, and isnt hot enough to melt through the floor youll be fine.

the mist that your seeing is the atmosphere, it stops because it has pumped all of the gas from the system.

If I shut down the vac pump at this point will it still be drawing water from the oil ??
I guess my real question is, if you stop the pump after hitting full vac is the water and or whatever you want to draw out still coming out, or must the pump remain on the whole time ?

Not water. Ethanol.
Hopefully.

Having said that…

Start here: Ethanol recovery with Megahome Countertop Water Distiller

You can also just blow your solvent off to atmosphere with a rice cooker.

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Thanks man, I think I will end up getting a rotovap lol.

I said water in my previous post and you corrected me and said it was ethanol but now im very confused because the reason i got the vac chamber was to remove that water that was in the ethanol because its making my oil really cloudy and since im making vape pens its a big issue im tryin to solve.

I got a question about the vacuum pump thats making me crazy though, if you stop the pump after hitting full vac is the ethanol you want to draw out still coming out, or must the pump remain on the whole time ?

First the ethanol comes out.
Then the water.

Turning off the pump and sealing the chamber will continue to remove solvent. The solvent will evaporate and reduce the vacuum level in the chamber (hanging out as vapor).

It will keep working up to a point, and then you’ll need to turn the pump back on…

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excellent!! thats exactly what I wanted to hear, thanks a million mr psycoplath :slight_smile:

what do you mean by “stage the vaccuum” ??

turn it up in steps.

suck a little.
suck a little more.
suck harder
…

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I have the same vac pump but I can’t go lower than 0.8.

Why is it better to use a vacuum chamber - to purge the extract after solvent recovery - than just let the solvent evaporate at room temperature? Besides the time save and the lower oxidation of the extract?

@MissionAcomplished get yourself a source turbo from Extractcraft there awesome then use your vacuum chamber .