| Pages:
1
..
17
18
19
20 |
VeritasC&E
Hazard to Others
Posts: 176
Registered: 29-1-2018
Member Is Offline
Mood: No Mood
|
|
Quote: Originally posted by flaminglasrswrd  | The only thing I paid was a few cuts from some broken glass. Well, that and all of the time invested in checking the dumpster each week for the last
few years.
The results:
Boxes and boxes of glassware and equipment. Several 2 and 3 liter RBFs, a 3L sep funnel, 4 Friedrichs condensers, two Edwards RV3 vacuum pumps, one
Welch 8907 pump, two Buchi r114 rotavaps with water baths, a thermo 6255 vacuum oven, a Fluke 412B HV PS, a thermo CL2 centrifuge, a Lytron mcs20g
cooler, and a thermo electron 2870 shaking water bath, two cases of TLC plates, and a couple of variable reflux distillation heads.
Lots of other condensers, graduated cylinders, addition funnels, flasks, assorted ground glass adapters, gas valves, some quartz stuff, and more.
All of the equipment seems to work and I tossed all of the broken glassware already. Some things have minor damage but they work all the same.
I had to make several trips back to the dumpster to get everything. Like I said in my other post, apparently one of the chem professors retired and
they cleaned out his lab. Lucky me!
I'm keeping most of it, but if something catches your fancy lmk and maybe we can work out a deal.
|
I am so jealous of you that I cannot put it in words.
I would never have imagined that anyone on earth possibly could put stuff like these in a dumpster. Part of me thinks this cannot be true and you are
just trying to trigger the passionate chemists in us.
|
|
|
j_sum1
Administrator
Posts: 6335
Registered: 4-10-2014
Location: At home
Member Is Offline
Mood: Most of the ducks are in a row
|
|
Today i get to use my Friedrich's condenser for the first time. i am just using it to reflux, which I know it is not really designed for. But it is
still lots of fun.
|
|
|
Fery
International Hazard
Posts: 1026
Registered: 27-8-2019
Location: Czechoslovakia
Member Is Offline
|
|
they have 2 L in stock and sell to EU, certainly surrounding countries, I do not know how far... also not sure about the diameter of neck whether it
would be compatible with your cover part... also minimal order is 150 EUR so they won't sell you only this one flask for 100 EUR
https://sklep-chemland.pl/en/szklo-laboratoryjne/szklo-z-ele...
the seals compatible with their glass seem to be 100 mm
https://sklep-chemland.pl/en/szklo-laboratoryjne/szklo-z-ele...
|
|
|
Organikum
resurrected
Posts: 2339
Registered: 12-10-2002
Location: Europe
Member Is Offline
Mood: frustrated
|
|
Thanks for the link, sadly they use a different flange and the prices are also quite hefty. This PTFE O-ring for the reactors is insane nearly 80 €,
In Germany they want over a hundred though. Just a core of silicone rubber with PTFE coating. I buy the thinner silicone or rubber o-rings and wrap
them in three layers of 19 mm x 0,2 mm PTFE tape. Thanks to the cold-creep of PTFE the tape sinters to a solid coating in no time. Cost per O-ring
about 6 € and never had a problem at no temperature and with no solvent.
And I got a 2-liter reaction flask meanwhile, not cheap but cheap compared to what they want at official sources. 90 € I think? Was new. 250 €
usual price.
|
|
|
B(a)P
International Hazard
Posts: 1139
Registered: 29-9-2019
Member Is Offline
Mood: Festive
|
|
My latest purchase. Looking forward to putting it to use.
|
|
|
Morgan
International Hazard
Posts: 1705
Registered: 28-12-2010
Member Is Offline
Mood: No Mood
|
|
Some 10 X 150 mm quartz test tubes with shipping came to $3.00 a piece from China.
 
|
|
|
XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Not glassware but most recent purchase that I am excited about, it came with more stirrers than listed so extra happy, to compliment it I ordered a
Teflon stirrer and bearings (2 of them)
I'll be making a protective splash shield for it as well to ideally extend its life!
It is a 3 phase drive dc motor, very strong and smooth speed control
https://www.ebay.ca/itm/174250439099 < Canada
I'm very happy with it
   
|
|
|
pneumatician
Hazard to Others
Posts: 412
Registered: 27-5-2013
Location: Magonia
Member Is Offline
Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **
|
|
you can buy yellow caps, orange, green, white transparent of silicone...
I've yellow caps/liners, silicone ones... the silicone is for high purity menstruums... the others, many are only for color coding and some few are
for especial liquids/works.
check the catalogs!!! :-)
[file]95827[/file]
|
|
|
Herr Haber
International Hazard
Posts: 1236
Registered: 29-1-2016
Member Is Offline
Mood: No Mood
|
|
Uh... Why do I have 2 10ml quartz beakers on my desk ?
I got that in the mail today from China but I assume I would remember buying them / find a trace in my recent purchases on eBay!
Weird, but I'll take it 
The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
|
|
|
Fyndium
International Hazard
Posts: 1192
Registered: 12-7-2020
Location: Not in USA
Member Is Offline
|
|
These overheads are beyond superior bang for buck. They are very silent, smooth running, have freely adjustable rpm and have a lot of torque. They
merely register when running 10 liter volume reactions and can run days non-stop. Once you get to see one of these, you will loathe over any magnetic
stirrer for the rest of your life. It's more like comparing toothbrush or a PC fan to a small drill press in performance.
The stand included is also of exceptional quality and rigidity and weights several kg. The C-shaped stand is cast iron, and the two-piece shaft is
16mm steel with what looks like M10 thread. It could likely hold up your body weight no problem, the only major downside is it's very short, so you'd
need to mount the motor to a 16mm round bar or a threaded rod mounted to a table or fume hood yourself. The stands excel as sep funnel or other tool
holders.
You'd best get flexible shaft mount designed for linear controllers for 3D printers to mount a PTFE stirrer to the motor shaft. Set screw installation
also ensures the stirrer won't drop into the flask and smash through the bottom during operation, especially vacuum.
They seem to work quite well with vacuum operations with PTFE ground joint bushing and fluorine rubber o-ring and paraffin oil lubrication. It will
cut the high vacuum most likely because it naturally leaks a little, but it still enables distilling ~250C boiling liquids at 120-140C. High
performance stirring improves reactions a lot by consistent and strong mixing and thermal balance, which enables both less or more cooling or heating
depending on what is desired, and it creates similar effect to rotavap when distilling - stripping solvents that is - allowing you to input a lot of
heat without bumping and it increases evaporation rate.
Funny enough I would say they are overkill for smaller than 2L flasks and really get to their working range with 5-10L flasks minimum and could likely
stir reactions to 20-50 liters with zero issues over protracted times, hence they also suit for purposes like stirring mash for fermenting alcohol.
|
|
|
j_sum1
Administrator
Posts: 6335
Registered: 4-10-2014
Location: At home
Member Is Offline
Mood: Most of the ducks are in a row
|
|
| Quote: Originally posted by Herr Haber | Uh... Why do I have 2 10ml quartz beakers on my desk ?
I got that in the mail today from China but I assume I would remember buying them / find a trace in my recent purchases on eBay!
Weird, but I'll take it |
I have it on good authority that you have made it onto the Nice List this year.
|
|
|
Fery
International Hazard
Posts: 1026
Registered: 27-8-2019
Location: Czechoslovakia
Member Is Offline
|
|
Galileo thermometer from here: https://shop.es-drei.de/laborbedarf/laborzubehoer/13578/ther...
It was a reagent order, but I added this toy into the basket too.
When cold, everything floats on the top, that was also the case when I got the parcel (winter here). Now burning firewood in my stove so quite warm
here, most of balls sank to the bottom and the one floating is telling 26 C.
[Edited on 7-12-2022 by Fery]
|
|
|
XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by Fyndium |
These overheads are beyond superior bang for buck. They are very silent, smooth running, have freely adjustable rpm and have a lot of torque. They
merely register when running 10 liter volume reactions and can run days non-stop. Once you get to see one of these, you will loathe over any magnetic
stirrer for the rest of your life. It's more like comparing toothbrush or a PC fan to a small drill press in performance.
The stand included is also of exceptional quality and rigidity and weights several kg. The C-shaped stand is cast iron, and the two-piece shaft is
16mm steel with what looks like M10 thread. It could likely hold up your body weight no problem, the only major downside is it's very short, so you'd
need to mount the motor to a 16mm round bar or a threaded rod mounted to a table or fume hood yourself. The stands excel as sep funnel or other tool
holders.
You'd best get flexible shaft mount designed for linear controllers for 3D printers to mount a PTFE stirrer to the motor shaft. Set screw installation
also ensures the stirrer won't drop into the flask and smash through the bottom during operation, especially vacuum.
They seem to work quite well with vacuum operations with PTFE ground joint bushing and fluorine rubber o-ring and paraffin oil lubrication. It will
cut the high vacuum most likely because it naturally leaks a little, but it still enables distilling ~250C boiling liquids at 120-140C. High
performance stirring improves reactions a lot by consistent and strong mixing and thermal balance, which enables both less or more cooling or heating
depending on what is desired, and it creates similar effect to rotavap when distilling - stripping solvents that is - allowing you to input a lot of
heat without bumping and it increases evaporation rate.
Funny enough I would say they are overkill for smaller than 2L flasks and really get to their working range with 5-10L flasks minimum and could likely
stir reactions to 20-50 liters with zero issues over protracted times, hence they also suit for purposes like stirring mash for fermenting alcohol.
|
My bearings arrived! very nice given the cost of em, love the feel of solid Teflon!
I got it for trying to make Acetic anhydride via our deal late friends post in the reference section
I'll be using Silicon grease for one, but oil is a good idea as all, was wondering what I could use other then the grease, now I know!
[Edited on 7-12-2022 by XeonTheMGPony]
|
|
|
Organikum
resurrected
Posts: 2339
Registered: 12-10-2002
Location: Europe
Member Is Offline
Mood: frustrated
|
|
I suppose you will be using the PTFE coated stirrers with this. I recommend to buy a few Viton or other Fluoropolymere O-rings with nominally 8 mm ID.
Those are always a little bit tighter then nominal and the 7 mm shaft is actually wider the 7 mm. So using a 8 mm O-ring is perfect as it will be
squeezed tighter when it gets screwed down. The original 7 mm O-rings leave bad grooves on the shaft in no time, not good at all.
It is possible you have to widen the seating of the O-ring a little bit so it sits nicely centered but thats no problem using a 12 mm metal drill or
similar item. You use it by hand, not in the drill of course!
|
|
|
Sulaiman
International Hazard
Posts: 3723
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
+1
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by Organikum | I suppose you will be using the PTFE coated stirrers with this. I recommend to buy a few Viton or other Fluoropolymere O-rings with nominally 8 mm ID.
Those are always a little bit tighter then nominal and the 7 mm shaft is actually wider the 7 mm. So using a 8 mm O-ring is perfect as it will be
squeezed tighter when it gets screwed down. The original 7 mm O-rings leave bad grooves on the shaft in no time, not good at all.
It is possible you have to widen the seating of the O-ring a little bit so it sits nicely centered but thats no problem using a 12 mm metal drill or
similar item. You use it by hand, not in the drill of course! |
Ironically I am working on finding some better vitron o rings for it, and my second teflon stirrer I ordered arrived along with my balls for the mill!
The one that came with it wasn't going to clear with a claison adapter in the mix
ignore the heater pad, that's for my genset.
|
|
|
Rainwater
National Hazard
Posts: 937
Registered: 22-12-2021
Member Is Offline
Mood: Break'n glass & kick'n a's
|
|
Ordered me a new distillation head a few weeks ago, and she just came in.
Actually, I broke 3 claisen adapters trying to make this before I called a professional
https://www.clearhorizonsglass.com/
Gonna break her in this weekend.
"You can't do that" - challenge accepted
|
|
|
pneumatician
Hazard to Others
Posts: 412
Registered: 27-5-2013
Location: Magonia
Member Is Offline
Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **
|
|
My last toy, a 500 ml custom made big mouth flask 
Oh, now I can remove easily the vegetal matter from it!!
|
|
|
teodor
National Hazard
Posts: 924
Registered: 28-6-2019
Location: Netherlands
Member Is Offline
|
|
|
|
|
Sir_Gawain
Hazard to Others
Posts: 458
Registered: 12-10-2022
Location: [REDACTED]
Member Is Offline
Mood: Stable
|
|
Is that a Kipp's apparatus? I have always loves those things!
“Alchemy is trying to turn things yellow; chemistry is trying to avoid things turning yellow.” -Tom deP.
|
|
|
Rainwater
National Hazard
Posts: 937
Registered: 22-12-2021
Member Is Offline
Mood: Break'n glass & kick'n a's
|
|
I love the kipps apparatus. I've tried to order the cheap ones off amazon but they never arrive unbroken
"You can't do that" - challenge accepted
|
|
|
teodor
National Hazard
Posts: 924
Registered: 28-6-2019
Location: Netherlands
Member Is Offline
|
|
Yes, it is brand new Kipp's from Witeg.de. I can confirm that the quality of all components and connections are very good. It has standard
silicon/teflon sealants in all connections and standard GL threads.
[Edited on 11-5-2023 by teodor]
|
|
|
Keras
National Hazard
Posts: 934
Registered: 20-8-2018
Location: (48, 2)
Member Is Offline
|
|
Cute isn’t it?
|
|
|
Arthur Dent
National Hazard
Posts: 553
Registered: 22-10-2010
Member Is Offline
Mood: entropic
|
|
Wowzer!
Usually when I go to my local Renaissance store (Goodwill) near my house, I see the occasional beaker, but rarely any glassware worthy of my
attention. Obviously, It's not the place really for high-end laboratory equipment!
But this caught my attention this morning!!! I could not pass these up!!!
From Kimax, two very large graduated cylinders, one is 500 ml, the other is a 1.5 l behemoth !!! What are those doing at Renaissance? Pretty happy
finding these!
--- Art is making something out of nothing and selling it. - Frank Zappa ---
|
|
|
Morgan
International Hazard
Posts: 1705
Registered: 28-12-2010
Member Is Offline
Mood: No Mood
|
|
I bought a few of these quartz tubes for 16 dollars each plus shipping just to tinker with and was wondering what they might be used for. They each
came in sealed double plastic bags and have an etched number on them so they don't seem your ordinary UV quartz sleeve. The open end is a thicker
quartz not some plastic adapter. There's a similar 27.5 inch tube on eBay for $407.00 --
(Xycarb Ceramics 10320565 Quartz Tube 27.5")
The open end is a 2.12" outer diameter and the rest 1.49" OD.
   
[Edited on 13-4-2024 by Morgan]
|
|
|
| Pages:
1
..
17
18
19
20 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
