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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 
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  | 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 | | Quote: Originally posted by monolithic | 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 | | Quote: Originally posted by TheMrbunGee | | Quote: Originally posted by monolithic | 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 | | 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.
Within cells interlinked
Within cells interlinked
Within cells interlinked
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arkoma
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Stainless steel keck clips!!!!
"We believe the knowledge and cultural heritage of mankind should be accessible to all people around the world, regardless of their wealth, social
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.
 
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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.
Within cells interlinked
Within cells interlinked
Within cells interlinked
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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....
“I will show you fear in a handful of dust.”
― 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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