Orange juice has been vacuum concentrated since the fifties. You can get
water to boil at room temperature if the atmospheric pressure is low
enough. You can get ice to boil off at below freezing temperature [well,
it really sublimates...goes straight from ice to water vapor.. as ice would
have a really hard time boiling..being a solid]. It's called freeze drying.
ken
At 09:54 AM 4/11/2003 -0400, you wrote:
I have never heard the expression before, but I have heard of vacuum
distilled. It sounds like the distillation was done at greater than
atmospheric pressure. I am surprised they labeled it though.
The way a high efficiency distillation process works is that you start
with a stage that has high pressure. Then the condensation section is
cooled by the boiling chamber of the next stage at a lower
pressure. These stages are stacked so each follows the next one, and by
the time you get to the last stages you are running a vacuum. That way
the same amount of fuel will distill many times as much water as a one
stage unit will.
Marshall
bob smith wrote:
Can anyone tell me what compression distilled water is? I had just picked
up several 5 gal jugs from a daughter to fill with well water. This was
how they were labeled. I don't believe that she was using distilled water
in such quantities but rather her water supplier just used them for their
spring water for drinking.I must be fortunate to have a good quality
distilled water available locally. I have tried and tested all of the
brands available. The cheapest one at .69c has the lowest reading,
averaging between .8 and 1.1Bob Smith
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