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JJay
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I got a bump trap. Not only can I use it for distillations that bump a lot, I think it will function to keep column packing from falling out of the
column.
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Sulaiman
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JJay,
I have not been able to do any distillations for a while but
I'm convinced that bumping severely upsets equilibrium in a packed column,
ruining fine fractionations.
I've not tried boiling chips or surfactants but vigorous stirring helps a lot.
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JJay
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Oh, I don't doubt it... I don't usually run distillations without stirring, and I don't usually use a column with distillations that bump. I haven't
been using packed columns because I haven't had a way to keep the column packed.
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nimgoldman
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Yeah I have that anti-bumping adapter too. It helped a lot when I need to distill about 230 ml of DCM. I could stuff all that in a 250 ml RBF and
distill it while stirring. There was no bumping but lot of foaming which the adapter prevented.
My last purchase:
1. Erlenmeyer flasks with ground glass joints and glass Buchner funnels - to speed up filtrations and allow filtration right in the RBF
2. 90 mm powder funnel with ground glass joint (I got tired of cleaning the joints every time I pour a powder in flask via funnel)
3. Dean-Stark apparatus - for steam distillations, azeotropic distillations and removing water from refluxing mixtures
4. some RBFs
5. ball joint to male joint converter - so I can use different flasks with rotavap
6. pour adapter - for convenience ![:)](./images/smilies/smile.gif)
7. tiny volumetric flasks
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Ubya
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nanshinglass distillation kit $28+free shipping
2 glass aspirators 5€ each, bought in a random flea market
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monolithic
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I'm not sure what this is called, but I'm looking for a porous/fritted piece of glass that I could affix to a 10mm or 3/8" piece of tubing for
bubbling gas into solution. I know of Monteggia gas washing bottles, but I just want the glass so I can have a much more generalized apparatus. Does
this exist, and if so, what is it called?
[Edited on 27-9-2018 by monolithic]
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TheMrbunGee
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Quote: Originally posted by monolithic ![](images/xpblue/lastpost.gif) | I'm not sure what this is called, but I'm looking for a porous/fritted piece of glass that I could affix to a 10mm or 3/8" piece of tubing for
bubbling gas into solution. I know of Monteggia gas washing bottles, but I just want the glass so I can have a much more generalized apparatus. Does
this exist, and if so, what is it called?
[Edited on 27-9-2018 by monolithic] |
Found this, hope it helps!
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Ubya
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Quote: Originally posted by TheMrbunGee ![](images/xpblue/lastpost.gif) | Quote: Originally posted by monolithic ![](images/xpblue/lastpost.gif) | I'm not sure what this is called, but I'm looking for a porous/fritted piece of glass that I could affix to a 10mm or 3/8" piece of tubing for
bubbling gas into solution. I know of Monteggia gas washing bottles, but I just want the glass so I can have a much more generalized apparatus. Does
this exist, and if so, what is it called?
[Edited on 27-9-2018 by monolithic] |
Found this, hope it helps! |
or if you want to spend less and you know how to bend glass tubing you could try with this
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TheMrbunGee
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Quote: Originally posted by Ubya ![](images/xpblue/lastpost.gif) | Quote: Originally posted by TheMrbunGee ![](images/xpblue/lastpost.gif) | Quote: Originally posted by monolithic ![](images/xpblue/lastpost.gif) | I'm not sure what this is called, but I'm looking for a porous/fritted piece of glass that I could affix to a 10mm or 3/8" piece of tubing for
bubbling gas into solution. I know of Monteggia gas washing bottles, but I just want the glass so I can have a much more generalized apparatus. Does
this exist, and if so, what is it called?
[Edited on 27-9-2018 by monolithic] |
Found this, hope it helps! |
or if you want to spend less and you know how to bend glass tubing you could try with this |
if you bend that an put it fritted part down, the glass border will trap some gas in it and it will function just like a plain tube. Making large
bubbles only..
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Ubya
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i thought about that, if you have enough space it could be used as it is
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Sulaiman
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I have one of these, it works well - the correct way up.
I used it to aerate yeast/sugar as an experiment,
OK for a day or two then blocked.
I suspect that yeast grew in the pores and blocked them.
A soak in piranha solution has restored it to use.
I guess that whenever a reaction rather than simple dissolution is involved,
especially if a precipitate is anticipated,
there will be significant risk of blocking pores.
And blocked pores may lead to excessive gas pressure.........
If you blast air/gas through too rapidly then larger bubbles are formed,
- even when the correct way up.
[Edited on 27-9-2018 by Sulaiman]
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monolithic
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Thank you for the links, those items are exactly what I was looking for.
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JJay
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I finally bit the bullet and ordered a 250 mL addition funnel with two stopcocks. I also picked up another 30 cm Liebig.
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Swinfi2
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I could have done with a second stopcock too but since I was distilling water i just plugged the fitting with loose cardboard.
My most recent glass is a 1L 3 neck 24/40 to replace my RIP 2 neck flask. f.
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JJay
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This is the first time I have ever seen one of these intact in person.
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j_sum1
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Nice addition to the toolbox Jjay. Enjoy using it.
Looks like my next purchase will be another 70mm crystallisation dish. Mine cracked today. I geuss it was more susceltible to ther.al stress than I
though+. I need a replacement 300mm liebig too. Chipped while cleaning.
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JJay
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I don't have a specific use in mind for the second stopcock, but I needed a replacement 250 mL addition funnel, and that one looked fancy. I can see
how it could be useful for doing multiple additions to a refluxing vessel. The funnel could also be useful in some inert gas setups.
I'm not sure what my next acquisition is going to be, but that 1 L Dewar condenser looks pretty neat.
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j_sum1
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Well the advantage in my view is the option to recharge the addition funnel with more reagent without allowing air into the system. The ability top
convert a batch process to a kind of pseudo flow process.
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DavidJR
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Quote: Originally posted by j_sum1 ![](images/xpblue/lastpost.gif) | Well the advantage in my view is the option to recharge the addition funnel with more reagent without allowing air into the system. The ability top
convert a batch process to a kind of pseudo flow process. |
Or conversely to recharge the funnel without letting large volumes of noxious gases out.
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VSEPR_VOID
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Those look expensive
https://www.ebay.com/itm/500ml-Jacketed-Glass-Beaker-Double-...
They might be good for energetic chemistry with cooling and temperature control.
If you put steam through it would maintain a good steam bath, as long as you watch out for a water hammer.
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arkoma
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Stainless steel keck clips!!!!
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status, nationality, citizenship, etc" z-lib
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nimgoldman
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These distillation adapters so that I can attach more efficient downward-facing condenser. I need this for distilling more volatile products from
reaction mixtures, like ether or bromoethane.
Other than that, a bunch of amber glass reagent bottles for more sensitive chemicals like chloroform.
![item01.jpg - 159kB](https://www.sciencemadness.org/whisper/files.php?pid=544513&aid=71352)
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VSEPR_VOID
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250 mL 24/40 single neck rbf
Thermometer adapter (glass and Teflon)
3 neck 500 mL 24/40
If I had more money I would buy larger flasks, more gas adapters, and a some micro scale glassware.
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TheIdeanator
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Scored an empty 500 ml bottle from the trash at school. I should ask my prof to save them for me....
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― T.S. Eliot
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Mr. Rogers
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College dumpsters are the best. I got two IKA hotplate/stirrers with cut cords and fixed them.
I guess they throw the whole unit out if the cord becomes frayed/burnt.
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