Arthur Dent
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Glassware identification question
Last Friday, I acquired this interesting piece of glassware at my favorite lab supply store. Paid $20 for it so I couldn't resist! I actually bought
it primarily because it's just a lovely piece of glassware:
It's described as a pear-shaped flask with an integrated claisen vigreux still head.
http://www.glasscolabware.com/laboratory-glassware/products....
it has 14/23 taper joints, it's Quickfit Pyrex and it's in very good shape. it's a bit dirty, especially around the vigreux part, but nothing that a
good bath in Pirhana won't take care of.
I happen to have a tiny liebig condenser with 14/23 joints at both ends that fits this gizmo perfectly. My question is, what can I do with it, aside
from putting it on top of my computer for display at the office?
More specifically, what is the usual purpose of this piece of glassware in a laboratory setting? I imagine that its main purpose must be in distilling
refining organic compounds in small quantities, I figure that I would fit a thermometer on top of the pear-shape flask, and that I connect a condenser
on the angled spout, but what about the neck above the vigreux section? Do I put another vigreux column? A vacuum adapter? A lovely arrangement of
flowers?
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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entropy51
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The thermometer normally goes at the top of the column, although you could put one both places. You want to know the temperature of the vapor leaving
the column and entering the condenser.
Please tell me where the heck you live that you have a store that sells gems like this. Some of us might relocate.
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matei
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Claisen flasks are used for vacuum distillations. The ground joint on top of the flask is for inserting a capillary tube and the one above the column
is for the thermometer. You'll have to put a vacuum adapter at the end of the condenser.
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Arthur Dent
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thanks for the feedback. So this thing should be used in an enclosed vacuum system, that's good to know.
As I mentioned, I have a tiny liebig that fits perfectly, and I also have a 14/23 vacuum adapter with a glass stopcock, but unfortunately, I have no
receiving flasks at all that have a 14/23 joint... that must not be something easy to locate... Oh and I have no thermometers with ground glass joints
at all.
Oh well, it will nicely adorn the top of my computer at the office until I find the accessories that will complement this mini-apparatus.
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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Magpie
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I'm not sure what you mean by "enclosed." To clarify, the vacuum is pulled at the tubulation (nipple) on the vacuum adapter. A ground glass receiver
flask must also be attached to the vacuum adapter to complete the sealing of the system.
The single most important condition for a successful synthesis is good mixing - Nicodem
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Arthur Dent
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I used the wrong term, by enclosed, I meant "sealed" and able to work in a vacuum environment. I checked my labware collection and it appears I have
everything needed for a sealed vacuum system after all!!!
I had a few small 14/23 flasks and a 14/23 thermometer adapter, the vacuum adapter is 19, but I soon found a spiffy little 19 to 14 adapter, yay!
So with my small plastic vacuum aspirator, I should be all set to do some fun vacuum distilling! I guess that the pear-shaped flask portion of the
apparatus must be dipped in a water bath or a sand bath? I imagine I can't use an open flame to this apparatus...
Robert
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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matei
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The vacuum adapter should look something like this:
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Arthur Dent
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@ matei: Yeah I know, I have a 19/22 and a 24/40 like the adapter you suggest... but I might have a challenge finding one in 14/23.
But I imagine that the setup above might be adequate for basic open system distilling, I realise that a vacuum port above the distilling flask might
suck out some of the material i'm trying to distill. 
Oh well, back to the drawing board...
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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spirocycle
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just collect your condenser to a claisen before the recovery flask and use your vacuum adapter
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jamit
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Can someone help me identify these glassware piece and what they are called and used for? thank you.
   
   
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jamit
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more help need identifying these glassware... thanks!
      
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jamit
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JUST ONE MORE GLASSWARE TO BE IDENTIFIED. THANK YOU.
  
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phlogiston
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You should number the images.
Bottom item looks like a Potter-Elvehjem homogeniser tube.
It is used to homogenise biological tissue or cells.
The top item might be the insert for it, but teflon ones are much more common and its shape would be unusual.
weighing boats?
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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jamit
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Thanks Phlogston! I think you're right about the Potter-Elvehjem homogeniser and the insert.
Any idea what the others glassware might be?
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watson.fawkes
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I've also seen these described for use as desiccant boats, containing P2O5, for making
ultra-dry gases.
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Mailinmypocket
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I stumbled across this post on Chemicalforums and am curious, does anyone know what the piece of glass is?
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Dr.Bob
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The top right photo is just a variety of T and Y fittings, for connecting tubing together. Top left on the second set looks like a jacketed filter
frit or column.
Second from top, left most on second set is a sample holding tube. Material can be condensed into the tube and the screw closed to seal the tube.
The last set of photos looks like some sort of electrochemistry apparatus. Might want to google the name on the apparatus.
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jamit
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thanks Dr. Bob. I'm so glad you're a member here! I always find your comments to be most helpful and informative. And of course, you seem to know
a lot about lab equipment.
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Mailinmypocket
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Any clue what this thing is for? It has a female 19/22 connection and a Büchner funnel type style but with one small hole in the glass. I'm stumped
as to what this is called or used for!
 
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Dr.Bob
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Mail,
I have seen these used to dry samples in vials by putting the vial on top of a large rubber stopper, then putting the lightly greased open end over
it, and hooking the glass joint to a inlet adapter hooked to a vacuum source. Not sure if that is what they are made for, but I have seen type of
use a few times now. poor man's desiccator.
I need to get photos of some stuff that I have left to sell, but don't know what it is. I have a fair number of odd things that I can't figure out
myself. Trying to go throiugh the left over boxes of random stuff for the third time, running out of some normal stuff, but I have lots of crazy
things that I can't figure out.
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jock88
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Quote: Originally posted by Dr.Bob  | Mail,
........running out of some normal stuff, but I have lots of crazy things that I can't figure out. |
Yippee.
Just the type of items I need for my round tower lab.
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Mailinmypocket
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That is actually an ingenious way to use this thing Dr Bob, Until now it's been useless!
It must at least be interesting to go through all kinds of odd and likely custom made pieces, looking forward to seeing some pictures of what you've
got 
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HgDinis25
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Can someone please tell me what are quickfit cones used for?
I'm refering to this:
http://www.scilabware.com/Joints/Cones/Quickfit-cones/p-75-7...
It has a quickfit socket but has an open end. I also have one like that but is shaped into a ~85º curve. What is is used for?
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forgottenpassword
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You can use it as a drying tube, but such things are often used by glassblowers to make custom parts. I do a little glassworking myself and have lots
of similar tubes just for the ground glass end. Double ended cones and sockets are quite common too, you just have to snap them in half and attach it
to a custom piece, so that it is compatible with the rest of the glassware.
[Edited on 30-11-2014 by forgottenpassword]
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