electrokinetic
Hazard to Self
Posts: 52
Registered: 6-6-2012
Location: Rhuidean
Member Is Offline
Mood: No Mood
|
|
Salvageable? Usable?
I just saw the crack at the neck of this distillation column. It seems hairline only, in the sense that all both the inside and outside of the neck
are smooth and there are no chips missing.
Can it be salvaged or repaired? Is it still safe to use?
thanks
 
|
|
|
DraconicAcid
International Hazard
Posts: 4278
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
I personally wouldn't use it for a distillation, but it should be fine for refluxing.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
j_sum1
Administrator
Posts: 6218
Registered: 4-10-2014
Location: Unmoved
Member Is Offline
Mood: Organised
|
|
I had a Liebig with the exact same injury recently. I used it for non-critical distillations for several weeks until it finally succumbed.
So, not high temp, nothing volatile and toxic like bromine, and no vacuum distillations.
It seemed to be fine for that.
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
I second what DA says. It should still be perfectly fine as a reflux condenser (and still would be even if that top joint was more badly broken than
it is). Just don’t use it for distillations.
|
|
|
Texium
|
Thread Moved
20-5-2020 at 16:33 |
SWIM
National Hazard
Posts: 970
Registered: 3-9-2017
Member Is Offline
|
|
Don't know how much effort you'd want to put into this, but if you cut the end off just past the crack and sand it a bit you won't have to worry about
that crack running eventually.
Straight cracks like that can slowly grow longer with repeated heating and cooling even if it never gets all that hot.
Of course then you'll only be able to use stoppers in the end, but it should last that way.
Is that a 19/22?
Hey! That's not a distillation column, its a coil and tube condenser!
Those things are pretty efficient and not cheap.
It is 19/22 isn't it?
A common size for that uncommon kind of condenser.
[Edited on 21-5-2020 by SWIM]
|
|
|
electrokinetic
Hazard to Self
Posts: 52
Registered: 6-6-2012
Location: Rhuidean
Member Is Offline
Mood: No Mood
|
|
Thank you.
|
|
|
electrokinetic
Hazard to Self
Posts: 52
Registered: 6-6-2012
Location: Rhuidean
Member Is Offline
Mood: No Mood
|
|
Quote: Originally posted by j_sum1  | I had a Liebig with the exact same injury recently. I used it for non-critical distillations for several weeks until it finally succumbed.
So, not high temp, nothing volatile and toxic like bromine, and no vacuum distillations.
It seemed to be fine for that. |
Thanks.
|
|
|
electrokinetic
Hazard to Self
Posts: 52
Registered: 6-6-2012
Location: Rhuidean
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by Texium (zts16) | | I second what DA says. It should still be perfectly fine as a reflux condenser (and still would be even if that top joint was more badly broken than
it is). Just don’t use it for distillations. |
Thanks!
|
|
|
draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
Member Is Offline
|
|
U can use something called a triangle file to score the glass below the crack I've done it using a smaller file on thinner tube
|
|
|
draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
Member Is Offline
|
|
Or u could use a blowtorch to seal the crack.it might warp the GG joint but it won't crack further.
|
|
|
Ubya
International Hazard
Posts: 1232
Registered: 23-11-2017
Location: Rome-Italy
Member Is Offline
Mood: I'm a maddo scientisto!!!
|
|
i tried fixing a flask like this, i sealed the crack but now there wre bubbles inside the glass, he is better of cutting away the cracked part
---------------------------------------------------------------------
feel free to correct my grammar, or any mistakes i make
---------------------------------------------------------------------
|
|
|
Belowzero
Hazard to Others
Posts: 173
Registered: 6-5-2020
Location: Member Is Offline
Member Is Offline
|
|
I once contacted a technical glass workshop if they could repair one of my coils that has a similar problem, they told me it needs to be
reheated/baked to remove the stress from the glass, apparantly this creates internal stress which can result in further cracking upon heating.
[Edited on 26-5-2020 by Belowzero]
|
|
|
draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
Member Is Offline
|
|
| Quote: Originally posted by Belowzero |
I once contacted a technical glass workshop if they could repair one of my coils that has a similar problem, they told me it needs to be
reheated/baked to remove the stress from the glass, apparantly this creates internal stress which can result in further cracking upon heating.
[Edited on 26-5-2020 by Belowzero] |
I've melted cracks shut that didn't crack after not annealing
|
|
|
Belowzero
Hazard to Others
Posts: 173
Registered: 6-5-2020
Location: Member Is Offline
Member Is Offline
|
|
Good to know, might give it a shot, I have a few parts that have cracks in it.
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Borosilicate is much friendlier for that kind of repair, but if you can happen to anneal it, it is all ways a good idea.
for a complicated glass wear like that I'd certainly preheat the whole thing then use a good propane torch that has a wide heat pattern.
Start from the base of the crack and heat the whole area up then slowly focus the heat on the spot til it starts to seal then work your way up keeping
things as uniformly heated around the rest of it
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
