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Author: Subject: "OTC" replacement for Soxhlet extraction sleeves?
stoichiometric_steve
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[*] posted on 1-8-2008 at 04:44
"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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[*] posted on 1-8-2008 at 05:14


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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[*] posted on 1-8-2008 at 06:23


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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[*] posted on 1-8-2008 at 13:34


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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[*] posted on 1-8-2008 at 14:20


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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[*] posted on 2-8-2008 at 18:12


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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[*] posted on 3-8-2008 at 09:12


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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[*] posted on 4-8-2008 at 18:03


you can wrap whatever you want in a coffee filter.
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[*] posted on 5-8-2008 at 01:08


Or better, 24 or 32cm Filter paper.
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dapper
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[*] posted on 5-8-2008 at 05:33


Yeah. I got a case of the extraction thimbles, they're just cardboard.
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angelhair
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[*] posted on 20-10-2008 at 16:32


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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[*] posted on 20-10-2008 at 22:59


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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[*] posted on 20-10-2008 at 23:16


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.



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stoichiometric_steve
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[*] posted on 21-10-2008 at 00:38


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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