Yttrium2
Perpetual Question Machine
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General Lab Glass Questions
Is 400mm Liebig condenser long enough? -- When is 500mm used?
-I was told to go with a 400mm Liebig.
Can allihn bulb condensers be packed with the glass packing -- for fractional distillation?
would a modified claisen adapter ( the kind that looks like a 3 neck) stand up to a 3 neck flask, i.e. under vacuum, or is it for some reason limited
in this application?
It'd be ideal to consolidate
(Probably my last post)
EEEEek
[Edited on 2/25/2023 by Yttrium2]
[Edited on 2/25/2023 by Yttrium2]
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j_sum1
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My liebig is 300 mm. The next one I buy will be 200mm.
If I need higher wattage cooling than the liebig then I go for a different design with greater surface area.
I know there are occasions where you wsnt a long straight condenser - even up to 600mm. But these are not applications that I am doing.
You can always apply less heat and distil a bit slower, so a big condenser is not always better anyway. A less aggressive distillation will give
clearer fractions. And smaller surface reduces mechanucal losses.
I would think packing a straight column will be easier than an ahlinn. But whatever.
The adapter you show may make a reasonable substitute for a 3 neck flask. But really, get the adapters you need for the projects you are doing. Watch
a bunch of chemplayer vids. It is amazing what he accomplished with just a beaker and some vacuum filtration.
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