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re column temperature

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  • yldog@hotmail.com
    hi Steve For a still with a reflux column you shouldn t let the tempurature go above 80 because you will start to get propanol at 82. i am guessing the other
    Message 1 of 1 , Sep 25, 2000
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      hi Steve
      For a still with a reflux column you shouldn't let the tempurature go
      above 80 because you will start to get propanol at 82. i am guessing
      the other still you where refering to was a pot still which would
      explain why they say 90 because pot still's don't get much separation
      so you have to increase the tempurature to get adiquate amounts of
      distillate.

      in case you wanted to know the boiling points of several liquids
      which will be in the wash are as follows
      methanol 67
      ethanol 78
      propanol 82

      so assuming that this new still has a reflux column which will
      separate these different substances quite well. You should have to
      top of the column at 70 and throw all of that stuff away because it
      will be mostly methanol. After this run the still at 79 or 80 untill
      all of the ethyl alcohol (the good stuff) is bottled.

      you should be able to tell when all of the alcohol is gone because
      the temperature will jump up several degrees.
      i hope i have been some help.
      from scott
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