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48309Re: Spiral prismatic packing (SPP)

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  • jamesarobinson@xtra.co.nz
    Jan 11, 2012
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      Thank you Dirck and all those other people that responded to my request. I now have the option of welding wire or beehive frame wire at about the same cost.Really appreciate the help and advice.
      Cheers,
      Jim

      --- In Distillers@yahoogroups.com, Dirck Donson <dirckdonson@...> wrote:
      >
      > You should never need 2m of SPP in a 2" or 3" column, as you can attain azetrope very easily under a meter with etched SPP...
      >
      > www.artisan-distiller.net/phpBB3/viewtopic.php?f=11&t=5092
      >
      > 3.5 ltrs fills 24" of a 3" column, and weighs ~13 pounds. 1.2 liters will fill 24" in a 2" column and weighs ~3.7 pounds.
      >
      > This provides 13+ Theoretical Plates in either size! From 13+ Plates you can reach azetrope with minimal reflux while producing a liter every 20 minutes.
      >
      > 0.8mm SS 316 welding wire is strong enough that you will never crush it, under it's own weight in a 2" or 3" column.
      >
      > .8mm/0,031" dia welding wire is also where the price break falls. Anything smaller exponentially inflates the price per pound.
      >
      > 3.5 ltrs of SPP made from 0.8mm 316 SS welding wire etched cost ten hours and $90 usd.You can make mandrels from screw driver bits and cut the SPP into bits by hand.
      >
      > Etched SPP is the best, don't get too worried about the wire diameter. 0.8mm will still be three times better than SS scrub pads.
      >
      > Or you can buy commercial SPP from a lab supply house for $200usd a pound...
      >
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