Sciencemadness Discussion Board - latest glassware purchase

I don't know what the typica use is. They will make good sleeves for thermocuples and heating element forms.

Are you in the UK or Europe, if so do you want to sell say ten of them and for how much?

Morgan - 7-4-2018 at 08:56

Quote: Originally posted by wg48

I don't know what the typica use is. They will make good sleeves for thermocuples and heating element forms.

Are you in the UK or Europe, if so do you want to sell say ten of them and for how much?

I'm in the U.S.

j_sum1 - 7-4-2018 at 19:36

Having that much quartz seems like it should be useful for something.
Have you tested them for thermal shock?
How difficult is it to actually melt the end to make a thermocouple sleeve?

Morgan - 8-4-2018 at 07:55

The thought crossed my mind, but in the process of getting settled in a new house my torches aren't at hand. I wrote a company in the Netherlands late Friday to find out what the glass tubes are and what they might commonly be used for. It would be sad if they are just ordinary glass.
So just now it dawned on me a small handheld butane torch was in a box in the other room. What unfolding drama the little experiment was. Using a small wide glass of water, the mystery tube was heated above the water at the point in the 5 cm long flame. My heart sank when the blue flame started showing the typical signs of a sodium flare. But upon further heating the yellow faded and disappeared. Apparently wiping any oil or salt from handling on your shirttail is hardly the way to go of course, but the main test was going to be the thermal shock. And recalling how quartz lightbulbs have the warning not to handle them with your fingers, that oil or salts could damage them, that came to mind too.
The grand moment came when the hot end of the tube was submerged in water. Now I've dunked some 25 mm diameter Heraeus fused quartz in water and the sound it makes can be misleading, as if it might have cracked but this little 4 mm tubing not only sizzled and popped, it made a distinctive ping and it was heartbreakingly assumed to have surely fractured, but happily the factory flame polished end was still intack when removed from the water, yet disbelievingly so after first looking for fragments in the bottom of the glass.
Seeing some segments of water trapped or taken up in the tube from the test, it occurred to me one use, albeit meager, would be to craft a little putt-putt boat, the
tubing as good as metal in that respect.
https://sciencetoymaker.org/putt-putt-boat/patents-for-putt-...

On burping ...
"That was just the start of it. He set out to find out why some engines--even those without leaks--go dry and stop working. This is known as "burn out." It is very frustrating and mysterious."
https://sciencetoymaker.org/putt-putt-boat/putt-putt-boat-in...

[Edited on 8-4-2018 by Morgan]

Morgan - 8-4-2018 at 09:42

Quote: Originally posted by j_sum1

Having that much quartz seems like it should be useful for something.
Have you tested them for thermal shock?
How difficult is it to actually melt the end to make a thermocouple sleeve?

I haven't melted any quartz but was able to only slightly deform a piece of 10 mm tubing one time with just a Mapp gas torch that mixes in air. Maybe a 4 mm tube would have a chance being smaller and more likely if you could surround the flame in fire brick or something perhaps. Quartz emits UV when working and I don't have any eyewear for that.
The coe of the thermocouple wire I guess would match that of quartz - if made for mating the two.

[Edited on 8-4-2018 by Morgan]

XeonTheMGPony - 10-4-2018 at 16:28

Well despite the posts best effort my new parts arrived. thanks to deschems excellent packers!

[Edited on 11-4-2018 by XeonTheMGPony]

j_sum1 - 10-4-2018 at 16:48

Yowzer!
It's a while since I have seen a postal parallelogram as good as that one.

Morgan - 11-4-2018 at 18:04

Some little swizzle sticks that seemed like something nice to have for art or science, the total price a little under 8.6 cents per swizzle. What might be a typical use for these I wonder?

More information ...
I contacted the eBay seller today and he wrote back this.
"I believe that the quartz tubes were meant to be used to make custom HID lamp bulbs.""I'm curious what you might be using them for though..."
I wrote him back and asked him the same and how he came about them. He said he had more.

I contacted Philips quartz and the representative said they were possibly the internal tube of a quartz bulb, the woman sounded like a new hire and couldn't find out anything more from the product code. I spent about ten minutes talking to her just to gather that scant information.

[Edited on 12-4-2018 by Morgan]

Morgan - 12-4-2018 at 09:36

The quartz tubes that were sold to me were going to be used for a flashlight. The seller replied "The custom bulbs were going to be for a special flashlight built for the military. They had to be custom made for the level of brightness and IR output required. "

JJay - 7-9-2018 at 03:26

eBay just gave me a $20 off coupon... I'm giving some serious thought to these:

greenlight - 7-9-2018 at 03:49

Oooh thats a nice pressure equalizing funnel, haven't seen one with two stopcocks before.

JJay - 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.

Sulaiman - 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.

JJay - 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.

nimgoldman - 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

Ubya - 19-9-2018 at 02:13

nanshinglass distillation kit $28+free shipping
2 glass aspirators 5€ each, bought in a random flea market

monolithic - 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]

TheMrbunGee - 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!

Ubya - 27-9-2018 at 02:34

Quote: Originally posted by TheMrbunGee

Quote: Originally posted 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

TheMrbunGee - 27-9-2018 at 02:57

Quote: Originally posted by Ubya

Quote: Originally posted by TheMrbunGee

Quote: Originally posted 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..

Ubya - 27-9-2018 at 03:17

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

Sulaiman - 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]

monolithic - 27-9-2018 at 06:33

Thank you for the links, those items are exactly what I was looking for.

JJay - 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.

Swinfi2 - 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.

JJay - 15-10-2018 at 17:17

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

j_sum1 - 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.

JJay - 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.

j_sum1 - 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.

DavidJR - 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.

VSEPR_VOID - 16-10-2018 at 05:30

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.

arkoma - 16-10-2018 at 14:51

Stainless steel keck clips!!!!

nimgoldman - 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.

VSEPR_VOID - 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.

TheIdeanator - 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....

Mr. Rogers - 18-10-2018 at 19:28

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.

Herr Haber - 19-10-2018 at 02:58

I guess they throw the whole unit out if the cord becomes frayed/burnt.

It's probably even sillier than that.
I know a lot of companies cut cords from the (working) computer equipment they replace just for accounting reasons. With the cord, it still has a value, without it it doesnt.

monolithic - 19-10-2018 at 03:37

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.

It's probably cheaper to order a whole new unit than just a replacement cord from IKA.

Ubya - 19-10-2018 at 03:42

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.

my chemistry department cleans its labs and offices once or twice a year, we don't have a dumpster, so a truck comes, loads averything they threw (computers, stirrers, I ONCE SAW A ROTOVAP, equipment of every kind) and brings it somewhere (i don't know where...), i wait these rare events to scavenge interesting stuff. i need to find a friend in the department that will let me take freely what i need from the truck while they load it with stuff. i hope to find a rotovap

arkoma - 19-10-2018 at 12:20

Quote: Originally posted by nimgoldman

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.

Have the adapter on the right---very good pairing with my Graham condenser

TheIdeanator - 19-10-2018 at 20:02

Quote: Originally posted by Ubya