Slimz
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evaporation
is there a fast way to evaporate water that does not involve heat?? this may sound silly but i figured i'd ask...
Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
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Ozone
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The process of phase transition involves the transfer of energy (heat or other). You can minimize the *heat* needed by using:
Vacuum. Lyophillization. Azeotrope with acetone and blow down with air/N2.
You will not, overall, invest any less energy.
I know this is covered, at least in oblique fashion, elsewhere on this site...
cheers,
O3
-Anyone who never made a mistake never tried anything new.
--Albert Einstein
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smuv
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drawing a Vacuum, blowing air over the water, also adding a solvent that is miscible with water which has a lower boiling point (acetone). Or
combinations of what was listed.
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Slimz
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thanks
Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
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Slimz
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ok so if i add acetone to water that conatins an organic like an amine wich is polar (not sure if that maters) would the acetone have any adverse
effects on that organic material?
and should we move this to the organic board now...?
[Edited on 24-9-2007 by Slimz]
Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
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The_Davster
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| Quote: | Originally posted by smuv
blowing air over the water |
In a low dish this works awesome. It is my prefered evaporation technique. A computer fan over a petri dish for small ammounts of liquids(even in
water) works overnight.
Moved to beginnings.
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Blind Angel
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Amine are polar, keep that in mind. Acetone is fairly inert as long as it's not in extreme condition, which would in any way degrade your product, so
in your case there are no needs to worry on that. In fact we use mostly acetone in organic lab due to it's inertness and is ability to make water
evaporate faster. Depending on how much you have some method would be easier and more recommendec. As The_Davster said, simply use a shallow dish,
such as a petri or if you don't have a cookies pan or a simple plate, and put a fan over it, it should be dry overnight. The thinner the layer of
water will be the shorter time it will take, but the product will be more disperse. Vaccuum can help a lot when using bigger quantity with small
concentration and applying a very small amount of heat, but require more equipment. I never tryed lyophillization.
Simply take what's best for you.
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chemkid
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"In a low dish this works awesome. It is my prefered evaporation technique. A computer fan over a petri dish for small ammounts of liquids(even in
water) works overnight. "
I think i'll try that. I've had some sodium bisulfate drying, what, a week now?
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12AX7
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I have a ventilated cabinet with switched heating elements. It works quite nicely for almost everything.
Tim
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Slimz
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that's a great idea.. i could filter the inflow of air to keep out particulate .. gonna do some carpentry...
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hodges
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| Quote: | Originally posted by chemkid
"In a low dish this works awesome. It is my prefered evaporation technique. A computer fan over a petri dish for small ammounts of liquids(even in
water) works overnight. "
I think i'll try that. I've had some sodium bisulfate drying, what, a week now? |
Sodium bisulfate is hygroscopic, so it probably never will dry on its own unless you live in a desert climate.
Hodges
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