AW: Spirit Stills and Reboilers?

[Horst Luening]

Hello Dave!

We already talked about this here and came to two different conclusions.

This is my thinking of it and how I understood this during explanations in several Bourbon plants:

The doubler/thumper is no distillation device. Because a lot of column stills are now made of stainless steel, you need some time of contact between the raw whiskey (white dog) and copper. This is to have the necessary catalytic processes going. Because you loose some energy over the pipes to the doubler you need some heating too. This has nothing to do with distillation.

Perhaps this is also the answer to the question? May this device be only in place for more contact of the alc. fumes with copper?

Regards,
Horst

-----Ursprüngliche Nachricht-----
Von: MALTS-L at RZ.UNI-KARLSRUHE.DE [mailto:MALTS-L at RZ.UNI-KARLSRUHE.DE]Im Auftrag von djrussobik at AOL.COM
Gesendet: Donnerstag, 3. August 2006 01:47
An: MALTS-L at LISTS.UNI-KARLSRUHE.DE
Betreff: Re: Spirit Stills and Reboilers?


Is this (or could this be) how the second distillation in a doubler/thumper in some Bourbon distilleries also is accomplished?.  I never quite figured out how this step actually was implemented -- it certainly seemed to be distinct from both the traditional pot-stills and column-stills, and not obvious if there was a direct source of additional heat.   Any one know how THAT distillation/step is performed?

  Thanks and Slainte!
    Dave in Boston

 
-----Original Message-----
From: ake.j-son at BREDBAND.NET
To: DJRussoBik at AOL.COM
Sent: Wed, 2 Aug 2006 7:12 PM
Subject: Re: Spirit Stills and Reboilers?


Hi again,

Another speculation: the liquid of the second step may also be more
volatile due to higher alcohol contents thus boiling at lower temperature.

Åke

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