stoichiometric_steve
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"OTC" replacement for Soxhlet extraction sleeves?
I need to do a big extraction (2kg of dry material) and don't want to buy a 25-pack of those neat extraction sleeves (~300 USD).
Does anybody now of a self made alternative to such a useless investment?
[edit]
A perforated sheet of plastic (PTFE) or metal bent to make a set of 2 tubes (bottom also made of perforated sheet) with a spacing of ~<1mm to fit
some cotton cloth or filter paper.
thanks anyways 
[Edited on 1-8-2008 by stoichiometric_steve]
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DJF90
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You can get sintered glass extraction thimbles.. basically a glass tube with a sintered end. About £15-£20 IIRC
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S.C. Wack
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2 kilos? How big a Soxhlet have you got?
I've never seen any need for anything but ordinary paper filter or a stretched cotton ball.
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undead_alchemist
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I have see models from 2L to 10L for Large ones.
He might have a 1L Model
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stoichiometric_steve
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| Quote: | Originally posted by S.C. Wack
2 kilos? How big a Soxhlet have you got? |
Several, up to 1500ml.
I have a buttload of glass wool, maybe i could make something out of that. Yet i like to avoid to mess with this stuff, the little fibres make me
think of lung cancer 
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angelhair
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Stoi,
I have a 2l soxhlet and I once made my own sleve from paper pulp using a pvc tube with a flask stuck on one end and it worked well with non polar
stuff. But then I left that in favour of nylon stockings and a tiny bit of glass wool which was fantastic with Pet ether on plant material.
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stoichiometric_steve
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angelhair,
about the nylon/glass wool thing, could you give me a bit more detailed info on how you made this into an extraction sleeve? thanks!
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dapper
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you can wrap whatever you want in a coffee filter.
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undead_alchemist
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Or better, 24 or 32cm Filter paper.
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dapper
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Yeah. I got a case of the extraction thimbles, they're just cardboard.
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angelhair
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Sorry Stoi, I didn't mean that I made a sleave out of nylon/ glass wool.
All I did was to suff the bottom of the soxhlet with the wool and then place virgin (meaning not dyed) nylon stockings on top of that. That worked
very well for extracting oils from plant material that was dried and ground down to a fine powder.
With pet ether, the drainage was fast, even though ithe material was compressed lightly.
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jarynth
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http://www.etsy.com/view_listing.php?listing_id=9486459
http://www.etsy.com/view_listing.php?listing_id=10782423
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Nicodem
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I once made a Soxlet extractor using a polypropylene reagent bottle, some tubings, two-component glue and made the sleeve out of cotton textile
(sawing a piece of white sheet). Worked great for acetone or ethanol (I don't think you can use nylon with acetone!). Though for 2 kg material you
will need a very, very big Soxlet.
…there is a human touch of the cultist “believer” in every theorist that he must struggle against as being
unworthy of the scientist. Some of the greatest men of science have publicly repudiated a theory which earlier they hotly defended. In this lies their
scientific temper, not in the scientific defense of the theory. - Weston La Barre (Ghost Dance, 1972)
Read the The ScienceMadness Guidelines!
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stoichiometric_steve
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angelhair, thanks for the clarification.
in the meantime i bought another big soxhlet which came with an appropriate large paper thimble.
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