Skyjumper - 7-3-2010 at 09:04
I have a old glass bottle filled with 12.5 molar NaOH (It's been sitting in my base cabinet for about 10 years at least) and I have tried everything
to get it out (soaking it inverted in almost boiling water overnight, silicon, taking a hammer to the cap to knock it out, and lastly heating the
glass around the stopper with a terril burner) The last point, heating it with a burner caused the stopper to fracture, leaving about 1/4 of the
stopper wedged in there. Now I want to dispose of the bottle, but obviously leaving 12.5 molar NaOH in the trash in a container that could burst at
any time is a bad idea, so I am looking to find other options.
My instructor wants me to hit it with a hammer. I don't like this idea (its a thick pyrex container from yesteryear anyway)
Fleaker - 7-3-2010 at 09:10
I'd wrap it in an absorbent blanket and lightly take the hammer to it while wearing coat, goggles, gloves, and face shield. Have a gallon or two or
three of vinegar handy to neutralize, though dilute HCl works.
hissingnoise - 7-3-2010 at 09:14
If you don't want to use a hammer, you could take the precautions Fleaker suggested and then hit it with a sledge. . .
gardenvariety - 7-3-2010 at 09:32
Drill out the remaining piece of stopper.
Skyjumper - 7-3-2010 at 09:33
I was considering drilling a hole in the bottom (where the glass seems thinest) The stopper is about 3/4th of an inch thick.
smaerd - 7-3-2010 at 11:26
Drilling through glass isn't easy. If you plan on doing that, use a glass drill bit and wear a dust mask(can't run water over it to get the sodium
hydroxide out).
I'm a noob so maybe this isn't really a good idea. Have you tried adjusting the heat on it? Maybe heating or cooling could help? I know NaOH is used
to etch glass but I doubt it would fuse glass together.
Sodium hydroxide is easy to come by and/or prepare though, if it's a small bottle I'd just forget about it honestly.
[Edited on 7-3-2010 by smaerd]
unionised - 7-3-2010 at 11:49
There's every chance that trying to drill it will have the same effect as hitting it with a hammer anyway.
Can you light a big bonfire that's away from anything important
Skyjumper - 7-3-2010 at 11:50
It's getting rid of it that is the problem. The solution is fairly strong. (12.5 molar) I don't want it to break in the trash. and the only real
etching from lye your going to get is via melted pure NaOH, not a solution. From what I see this issue is fairly common. (Hydroxide sticking glass
stoppers)
hissingnoise - 7-3-2010 at 12:02
If the bottle has a long neck you might be able to break it off using a hot-wire loop electrically heated.
Or a crook of heavy steel wire heated to redness and made to contact the neck around its circumference could possibly do the trick.
Pyrex though, needs considerably more heating that soda-glass. . .
Careful use of a glass-cutter round the neck followed by vigorous tapping would be another idea!
[Edited on 7-3-2010 by hissingnoise]
Skyjumper - 7-3-2010 at 12:17
Im going to try the glass cutter, or maybe score around the bottle with one then hit it with a hammer, to at least have a clean cut
a_bab - 7-3-2010 at 21:54
I'd go on with the burner to completly fracture the bottle neck. What you are looking for eventually is a crack without splashing. I'd use goggles,
gloves and protective labcoat while doing it. The bottle would be in a metal bucket (or in a large tray) and an empty bucket ready nearby to acomodate
the bottle once cracked.
agorot - 8-3-2010 at 05:47
Go to a thrift shop, get a really old microwave, plug it in outside, put the bottle inside the microwave, and cover the whole setup with a few garbage
bags and an inverted trash can and press the start button for 5 minutes 
ninefingers - 8-3-2010 at 07:12
Great Idea!
I was going to say, just put in boiling water a while. I've gotten frozen stoppers off old antiques this way.
(Use a very small bit of silicone grease at the middle of the stopper when it is free to prevent further seizures.)
1281371269 - 8-3-2010 at 09:05
How about a filling a plastic bucket with sand, digging the bottle into it so it's about half submerged (no nasty flying glass that way) then standing
back and dropping a rock on it? Wear goggles, of course. After that you could neutralise it or just dilute it with loads of water.
Skyjumper - 8-3-2010 at 11:34
I put it in a lab tray, used the poly window on the fume hood (and gloves and goggles!) for protection, hit it with a hammer. Neutralized with some 6m
hcl. all is well.
Now off to the next project....
hissingnoise - 8-3-2010 at 14:06
Will it too, require the use of a heavy, blunt instrument?
Skyjumper - 9-3-2010 at 12:17
Always.
I prefer sharp objects personally.
hissingnoise - 9-3-2010 at 12:26
Ouch!
gregxy - 9-3-2010 at 14:35
Put it in the sink, cover it with a rag and then crack it with
a hammer. Then rinse the NaOH down the drain.
Discard the glass in the garbage. Drano is mostly NaOH
and it goes down the drain all the time.
Skyjumper - 9-3-2010 at 19:02
Thats a good idea, except that was a very strong solution (12.5m is around 50%wt NaOH).