Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: interesting sep. funnel adaptation
Pyro
International Hazard
*****




Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline

Mood: No Mood

[*] posted on 12-10-2012 at 09:21
interesting sep. funnel adaptation


hello,
last week some of my new toys arrived :)
a 50 cm vigreux column and a few sep. funnels.
the interesting thing is that the sep. funnels have a small horizontal groove in the ground glass top, just deep enough to make a small opening, end the stoppers have a vertical groove from the bottom to the middle. it took me a while to figure out what they were, but then when i was washing them it cane to me! if you align the two cuts they form a small opening so that air can get in the body of the sep. funnel so that the liquid inside can drain out. and if you want to invert it you turn the stopper so that the cuts are not aligned and it's water/chemical proof.

Has anybody come across this before?

sep funnel 1.jpg - 183kBsep funnel 2.jpg - 185kBsep funnel 3.jpg - 178kB




all above information is intellectual property of Pyro. :D
View user's profile View All Posts By User
Ephesian
Hazard to Self
**




Posts: 97
Registered: 14-8-2012
Member Is Offline

Mood: No Mood

[*] posted on 12-10-2012 at 09:32


Pretty cool euh? Sep funnels have come a long way :)
View user's profile View All Posts By User
Hexavalent
International Hazard
*****




Posts: 1555
Registered: 29-12-2011
Location: Wales, UK
Member Is Offline

Mood: Pericyclic

[*] posted on 12-10-2012 at 09:32


Yea, I once had a few density bottles that had them. I only noticed it until the iodine I had in one of them started coming out of the opening!



"Success is going from failure to failure without loss of enthusiasm." Winston Churchill
View user's profile View All Posts By User
Dave Angel
Hazard to Others
***




Posts: 128
Registered: 22-3-2005
Location: UK
Member Is Offline

Mood: 0 K

[*] posted on 12-10-2012 at 09:44


I wonder if the intended purpose of the adaptation is to prevent pressure build up from volatile solvents and gas-evolving reactions during shaking. An adaptation to save one the effort of taking the stopper out seems a little excessive!



Find your nearest fellow mad scientists! Add yourself to the Science Madness Hackspace map today!
View user's profile View All Posts By User
Pyro
International Hazard
*****




Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline

Mood: No Mood

[*] posted on 12-10-2012 at 12:04


nope dave angel. whatever you are using would leak out. I think it is so you can let something drain out without taking out the stopper. for something like, say:Br2



all above information is intellectual property of Pyro. :D
View user's profile View All Posts By User
kristofvagyok
International Hazard
*****




Posts: 659
Registered: 6-4-2012
Location: Europe
Member Is Offline

Mood: No Mood

[*] posted on 13-10-2012 at 11:24


Yep, we got a few like that in the lab, but I never liked to work with them.... If you work fast and you miss the right position then your reaction could easily end on you.



I have a blog where I post my pictures from my work: http://labphoto.tumblr.com/
-Pictures from chemistry, check it out(:

"You can’t become a chemist and expect to live forever."
View user's profile Visit user's homepage View All Posts By User
Pyro
International Hazard
*****




Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline

Mood: No Mood

[*] posted on 13-10-2012 at 11:45


odd. seems an eastern european thing. i got these from poland. nobody else seems to have heard of them!



all above information is intellectual property of Pyro. :D
View user's profile View All Posts By User
mr.crow
International Hazard
*****




Posts: 884
Registered: 9-9-2009
Location: Canada
Member Is Offline

Mood: 0xFF

[*] posted on 13-10-2012 at 20:24


I kind of like it. Don't have to take the stopper off while separating. But then again there are two things to screw up instead of one (the stopcock being open).

That cut in the glass looks really nasty and would weaken the joint. Don't want the top snapping off while using it!

My 1L crummy Bomex funnel was advertised as having something like that but didn't. Maybe the ebay store changed their supplier.




Double, double toil and trouble; Fire burn, and caldron bubble
View user's profile View All Posts By User
Dr.Bob
International Hazard
*****




Posts: 2015
Registered: 26-1-2011
Location: USA - NC
Member Is Offline

Mood: No Mood

[*] posted on 19-10-2012 at 07:31


Cute, I have seen similar things a few times before, but not often, and mostly on custom made items. But this one is different that what I have seen, which is usually two holes that have to line up. A few glass stopcocks I have seen have those types of holes drilled into the stopcock itself, I guess to make a 3 way from a 2 way or such.
View user's profile View All Posts By User
Pyro
International Hazard
*****




Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline

Mood: No Mood

[*] posted on 19-10-2012 at 07:39


True Mr crow. But luckily you don't put the joint of a sep funnel under extreme conditions like you would a distillation joint, so i hope i will be fine.
but i am quite pissed off at the seller for selling these as new, but it was less than 10$ for two so even if I lose them I will be ok.




all above information is intellectual property of Pyro. :D
View user's profile View All Posts By User
Salmo
Harmless
*




Posts: 42
Registered: 20-9-2012
Member Is Offline

Mood: No Mood

[*] posted on 24-10-2012 at 23:48


Useless, gas is evacuated from the main valve just bringing the funnel upside down.
View user's profile View All Posts By User
Pyro
International Hazard
*****




Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline

Mood: No Mood

[*] posted on 26-10-2012 at 07:34


we (at least I did) meant when it's right way up you can open the stopcock without taking off the stopper. normally it would build up a vacuum and flow very slowly and unevenly or even stop



all above information is intellectual property of Pyro. :D
View user's profile View All Posts By User

  Go To Top