Results 1 to 3 of 3

Thread: Vacuum Distillation under $5k?

  1. #1
    Join Date
    May 2013
    Location
    Boulder
    Posts
    17

    Vacuum Distillation under $5k?

    I was just told I could use vacuum distillation to lower the ABV in my beer. The description was simple: get a glycol dairy tank about 30-50 gallons. Pour in your beer. Vacuum distill while pumping hot glycol into the jacket. And in no time I can run the ethanol out into the drain. Then I would add this beer back into my brite, remove another sample and repeat until the ABV is where I want it.

    So I Google vacuum distillation systems and, wow, these things are not cheap.

    Advice on where to find a small system as described?

  2. #2
    Join Date
    May 2012
    Location
    Livermore, CA
    Posts
    655
    To get the EtOH out at 25C, you would have to reduce the pressure in the tank to less than 10kPa which is more than 13psi less than atmospheric pressure. Im not sure how much negative pressure your tanks are rated for, so I would check that unless you want to implode the tank. So you would have to go warmer to keep the vacuum pressures lower, and I think there is a large risk of oxidation when heating the beer and transferring it. The other issue that I see with this is removal of other volatile compounds. Essential oils from hops and other flavor compounds are even more easily boiled off than the EtOH, these would get removed at the same time. I'm not sure that this is the best method for EtOH removal, plus you would need a pretty good sized pump to maintain vacuum on a big tank. That said, you can convert an air compressor or refrigeration compressor to create up to 27inHg of vacuum pretty easily.
    Last edited by jebzter; 10-24-2014 at 09:03 AM.

  3. #3
    Join Date
    Oct 2006
    Location
    Taos, NM USA
    Posts
    335
    Here's a new method to try? Pervaporation.
    http://www.eurekalert.org/pub_releas...-itt110414.php

Similar Threads

  1. Does anyone have experience with VDK distillation?
    By mmarcolina2 in forum Quality Control (Available for Sponsorship)
    Replies: 1
    Last Post: 11-12-2017, 11:00 PM
  2. Freeze Distillation Illegal?
    By Captain Mullet in forum Brewstillery/Distillation Q&A (Sponsored by DYE, Daeyoo Tech)
    Replies: 3
    Last Post: 01-21-2008, 12:48 PM
  3. Reference/texts for distillation
    By gitchegumee in forum Brewstillery/Distillation Q&A (Sponsored by DYE, Daeyoo Tech)
    Replies: 1
    Last Post: 02-08-2007, 09:45 AM
  4. Distillation
    By Richard Langton in forum Process and Techniques (Sponsored by CPE Systems)
    Replies: 1
    Last Post: 03-10-2004, 09:28 PM
  5. Distillation
    By Richard Langton in forum Brewstillery/Distillation Q&A (Sponsored by DYE, Daeyoo Tech)
    Replies: 0
    Last Post: 03-01-2003, 10:51 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •