BILLBUILDS
Hazard to Self
Posts: 82
Registered: 19-3-2016
Member Is Offline
Mood: No Mood
|
|
help with a soxlet extractor
oh so i was using my brand new soxhlet extractor and it was just about to empt or the first time so i put off going to the toilet in anticipation.
unfortunately this never happened as the ground pepper had clogged the tube not allowing fluid to flow though. how do i unlock this and how do i stop
it happening again?
i was thinking of pouring some drain cleaner (H2SO4or NaOH) in for a half hour to dissolve it and then use some cotton wool over the tube before
putting in material to be extracted
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
This probably belongs on one of the short questions threads... I don't have a Soxhlet yet, but I think I would try using water pressure.
|
|
|
A Halogenated Substance
Hazard to Self
Posts: 68
Registered: 7-2-2017
Location: United States
Member Is Offline
Mood: Oxidizing due to extended exposure to oxygen
|
|
Try bending a paper clip to try scrape/loosen the pepper that's stuck and rinse with water between attempts.
|
|
|
j_sum1
Administrator
Posts: 6324
Registered: 4-10-2014
Location: At home
Member Is Offline
Mood: Most of the ducks are in a row
|
|
A piece of wire bent to shape might be the easiest. Poke, scratch and dislodge rather than ram. Alternate with a squirty wash bottle.
Be patient.
When that stops working, allow it to dry for a few days. The material may contract and might dislodge more easily. Something like pepper should form
a crumbly cake rather than cement together.
If everything else fails I would mix up some piranha solution and add it one drop at a time with a glass pipette. Clamp the soxhlet securely in a
convenient position and wait a few minutes between drops for the piranha to work. Rinse and repeat.
(Disclaimer. I have never actually had this particular problem. But that is how I would approach it.)
|
|
|
jokull
National Hazard
Posts: 506
Registered: 22-2-2006
Location: Everywhere
Member Is Offline
Mood: Ice glassed
|
|
Warm NaOH will do the work if the clogging is fatty material. Pipe cleaners are cheap and safe to use for such thin glass tubing.
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
A pair of pointy bent tweezers or forceps might be helpful too.
Edit: removed rogue image
[Edited on 2-14-2017 by zts16]
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
A little liquid Inside and surrounding ultrasound bath or generator.
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
|
|
|
Sulaiman
International Hazard
Posts: 3697
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
As far as possible I would try to avoid scratching the glass,
have you tried warm water, shaking and patience ?
I have no soxhlet experience but I have read of filters being used,
a quick search of eBay.uk gave nothing,
try a wad of glass wool or similar at the bottom of the soxhlet next time ?
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
Lefaucheux10
Harmless
Posts: 30
Registered: 28-8-2016
Member Is Offline
Mood: No Mood
|
|
that's is in frech sorry but may be helpfull
http://alchimie-pratique.kruptos.com/MESZIMAGES/net14.gif
http://alchimie.kruptos.com/archives-2/archives-2011/la-corv...
|
|
|
Texium
|
Thread Moved
14-2-2017 at 07:12 |
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
Soxhlet setup is easy, so long as a few simple rules are followed (IMHO).
The substance must be in a filter of some kind, even if that is just a plug of cotton wool at the bottom of the extraction chamber. I use a filter
paper moulded into shape on the end of a broomstick.
Before adding the material to be extracted, pour in enough cold solvent to go about 1/2 inch up the syphon tube - this prevents really annoying
air-locks.
Fill the material to about 1/2 inch <i>below</i> the top of the syphon tube. If you overfill, it will not work so well and tends to go
everywhere.
Plug the top of the extraction chamber with cotton wool. This stops the material floating up.
The OP image looks like no filter was used at all, so the material went up the syphon tube along with the solvent, and got stuck.
|
|
|
feacetech
Hazard to Others
Posts: 163
Registered: 12-2-2007
Member Is Offline
Mood: No Mood
|
|
yea I always used Whatman cellulose thimbles, if the material has a tendency to float plug the thimble with glass wool or washed cotton wool.
just a plug of glass or cleaned cotton wool at the bottom and top would work if you cant be bothered with thimbles.
always watch the first 1-3 cycles of a soxhlet to make sure you haven't made a mistake or else you may end up with a fire or broken glassware.
|
|
|
NitratedKittens
Hazard to Others
Posts: 131
Registered: 13-4-2015
Location: In the basket with all the other kittens
Member Is Offline
Mood: Carbonated
|
|
Piranha solution will destroy the clog via oxidation
Basket of kittens for you ........BOOM
|
|
|
Sulaiman
International Hazard
Posts: 3697
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
I would personally NOT use Piranha solution in this case as I would surely spill some.
I use Piranha solution with no fear even for things like cleaning enammeled frying pans 
but a near-closed vessel with plenty of organic matter is just an accident waiting to happen.
P.S. used Piranha solution makes an excellent weed killer.
[Edited on 26-2-2017 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
I would avoid using piranha solution for that if at all possible, but if it comes down to a decision as to whether to use piranha solution or to buy a
new Soxhlet, it's time to break out the face mask and asbestos-plated armor and mix up a batch of flesh-eating corrosives 
|
|
|
macckone
Dispenser of practical lab wisdom
Posts: 2168
Registered: 1-3-2013
Location: Over a mile high
Member Is Offline
Mood: Electrical
|
|
Soak and dry cycle will loosen things up.
Warm water, soap with a little tubing to act as
a spray nozzle attached to a reusable ketchup bottle.
Alternate with q-tips attached to a straw or
a pipe cleaner with a plastic core. The metal ones
can scratch or chip glass. The coffee stirring straws
are excellent for this kind of thing.
A little vinegar works well to break up coffee grounds.
Not sure if it will work on pepper.
Bleach also breaks up organics and is usually readily
available.
|
|
|
ficolas
Hazard to Others
Posts: 146
Registered: 14-5-2016
Member Is Offline
Mood: No Mood
|
|
Uuhh
And 100% environmentally friendly!
|
|
|
Sulaiman
International Hazard
Posts: 3697
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
Absolutely, it is my garden, I do not want to pollute it.
Given the small quantity of pirhana solution produced, and selective application to weeds,
What is it that you think may damage the soil long- or medium-term ?
I am not being petulent, I really want to know as it is my garden.
............................................................................................
BILLBUILDS ... any progress ?
[Edited on 27-2-2017 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
Quote: Originally posted by Sulaiman  | Absolutely, it is my garden, I do not want to pollute it.
Given the small quantity of pirhana solution produced, and selective application to weeds,
What is it that you think may damage the soil long- or medium-term ?
I am not being petulent, I really want to know as it is my garden.
............................................................................................
BILLBUILDS ... any progress ?
[Edited on 27-2-2017 by Sulaiman] |
Assuming that there are no heavy metals in the sulfuric acid or whatever you're cleaning, the worst long-term effect would be increased soil acidity,
which might actually be a good thing, depending on your soil conditions and what plants you are planning to grow.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
