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6477RE: [Distillers] Re: Q2. Effect of Pressure?

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  • Robert N
    Oct 3, 2002

      Hi George, an idea that sprang to mind, why not give it a try on a small scale, either find a small vacuum pump and reservoir etc and give it a whirl. I know that you can even purchase hand vacuum pumps for checking automotive gauges. It seems like the theory is mostly correct and there isn’t anyone on the list or the others mentioned that has tried it before. We would all be interested in the results. I know it may cost $50 ~ $100 to try it out and of course the time to do it all, but it sure beats the hell out of spending up big on those tanks.


      Yours in Spirit!







      -----Original Message-----
      From: George Wessel [mailto:georgelola@...]
      Sent: Thursday, 3 October 2002 6:40 AM
      To: Distillers@yahoogroups.com
      Subject: Re: [Distillers] Re: Q2. Effect of Pressure?


      > Increased pressure will make it harder to seperate the ethanol from the
      > water - the azeotrope will move down to a lower %  Thats why vacuum
      > distillation is an advantage - it moves the azeotrope (the max % you can
      > get when distilling) up from 96% to 100%
      Hello Tony

      Just a though off the top of my head.

      We're entering fall here now so our outside temp is cooler than our
      inside.  So if my boiler was inside, at room temp, it would be about 20
      to 30 degrees Cent. If my condenser was outside it would be 10 degrees
      today and even colder later on.

      I do not know at what temp alcohol would boil in any mixture of alcohol
      and water. So I'll have to just pull a number out of the air, let's say
      alcohol will vaporize at 20 inches of vacuum at 20 degrees Cent.  By
      using a storage tank, apply a vacuum to the boiler, lead the suction
      line outside to a condenser.  The outside temp is below the vapor temp
      of alcohol so the vapor would condense. The liquid alcohol will remain
      outside at a cooler temp until it is time to collect it. The compressor,
      storage tank and boiler are all inside where it is warm.  Only the
      condenser is outside.  As long as the vacuum is maintaned at a level
      above the vapor point of alcohol (At room temp) but below that of water.
        Would it not separate the two.  After a few hours or days would you
      not have water in your boiler and alcohol in your condenser. Maybe the
      two vapor points would be to close to stay between, I have no idea. I
      wouldn't think that some sort of vacuum control would be to hard to come
      up with.

      Would the vacuum have to be increase as the alcohol level comes down?
      Just a thought

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