Large scale ethanol recovery recommendations

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easystephen

Member

• Jul 25, 2016

• #1

I'm going to need to evaporate and recover around 200L of ethanol a day. I was looking at some very large rotovaps and also some thin film evaporators.

Does anyone have any recommendations?

Anybody used one of these? Looks like a good price.

http://www.acrossinternational.com/...Rotary-Evaporator-w-Chiller-Pump-SE130-S2.htm

 

Ras Mason

Active member

Veteran

• Jul 25, 2016

• #2

Yep, was gonna buy this exact model.

 

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Old Gold

Active member

• Jul 25, 2016

• #3

Haven't seen one run in-persin but that SprayVap by Colorado Extraction looks pretty dandy. I've seen older schematics for similar nltrogen-spray evaporations. I would love to try it, creates a ridiculously thin film along with warm nitrogen stream.

 

deadkndys

Member

• Jul 25, 2016

• #4

Yeah that spray vap is pretty cool!!

https://youtu.be/jPdi_fYEJIs
https://youtu.be/4ZVYUeBOmtM

 

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Digital Man

Member

• Jul 26, 2016

• #5

deadkndys said:

Yeah that spray vap is pretty cool!!

https://youtu.be/jPdi_fYEJIs
https://youtu.be/4ZVYUeBOmtM

Click to expand...

Just curious .......... at the end of all of that, you are still left with a product that needs final ethanol purging correct? What's the preferred method to get the final bit of ethanol out of a concentrate that will allow it to pass testing regs?

 

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NWxSk1LLZ

New member

• Jul 26, 2016

• #6

Digital Man said:

Just curious .......... at the end of all of that, you are still left with a product that needs final ethanol purging correct? What's the preferred method to get the final bit of ethanol out of a concentrate that will allow it to pass testing regs?

Click to expand...

my thoughts exactly..

 

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NWxSk1LLZ

New member

• Jul 26, 2016

• #7

can't beat a Buchi, but a Buchi can beat the bank account!

 

deadkndys

Member

• Jul 26, 2016

• #8

That whole extractor system I posted can process 200 lbs in a day.

But for its $90k price tag I think it's almost worth it lol.

 

deadkndys

Member

• Jul 26, 2016

• #9

Digital Man said:

Just curious .......... at the end of all of that, you are still left with a product that needs final ethanol purging correct? What's the preferred method to get the final bit of ethanol out of a concentrate that will allow it to pass testing regs?

Click to expand...

I'm pretty sure they mentioned using vac ovens to get any residual solvent(s) out.

 

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easystephen

Member

• Jul 26, 2016

• #10

I'm looking at the sprayvap as well, looks like a pretty good system for the price. The whole system including the reaction vessel is 90k but the sprayvap alone is around 60k I think.

The sprayvap or the rotovap can remove pretty much all of the ethanol it just takes longer. In my case, I plan on removing any residual ethanol in a first pass through a wiped film short path molecular still.

 

Ras Mason

Active member

Veteran

• Jul 26, 2016

• #11

Or à xds 10-c on a vaccuum oven @ lower temps.