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Author: Subject: latest glassware purchase
JJay
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[*] posted on 18-9-2018 at 14:51


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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[*] posted on 18-9-2018 at 17:44


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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[*] posted on 18-9-2018 at 18:25


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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[*] posted on 18-9-2018 at 20:43


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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[*] posted on 19-9-2018 at 02:13



nanshinglass distillation kit $28+free shipping
2 glass aspirators 5€ each, bought in a random flea market
IMG-20180914-WA0004-1.jpg - 2.2MB IMG-20180828-WA0003-1.jpg - 2.4MB





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monolithic
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[*] posted on 26-9-2018 at 20:04


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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[*] posted on 27-9-2018 at 00:29


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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[*] posted on 27-9-2018 at 02:34


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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[*] posted on 27-9-2018 at 02:57


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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[*] posted on 27-9-2018 at 03:17


i thought about that, if you have enough space it could be used as it is




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sad.gif posted on 27-9-2018 at 05:08


Quote: Originally posted by Ubya  
or if you want to spend less and you know how to bend glass tubing you could try with this
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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[*] posted on 27-9-2018 at 06:33


Thank you for the links, those items are exactly what I was looking for. :)
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JJay
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[*] posted on 27-9-2018 at 17:27


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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[*] posted on 28-9-2018 at 13:53


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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[*] posted on 15-10-2018 at 17:17


This is the first time I have ever seen one of these intact in person.

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[*] posted on 15-10-2018 at 21:55


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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[*] posted on 15-10-2018 at 23:00


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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[*] posted on 16-10-2018 at 00:02


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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[*] posted on 16-10-2018 at 04:41


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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[*] posted on 16-10-2018 at 05:30


Quote: Originally posted by Morgan  
A jacketed beaker to tinker with ...


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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[*] posted on 16-10-2018 at 14:51


Stainless steel keck clips!!!!



Self aware bag of organic slime..............

Collector of reagents.
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[*] posted on 17-10-2018 at 12:01


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 - 159kBitem02.jpg - 143kB
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[*] posted on 17-10-2018 at 17:26


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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[*] posted on 17-10-2018 at 20:56


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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[*] posted on 18-10-2018 at 19:28


Quote: Originally posted by TheIdeanator  
Scored an empty 500 ml bottle from the trash at school. I should ask my prof to save them for me....


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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