It's hard for me imagine how they would attach. They resemble some metal clips I've seen but are not identical.
cyanureeves - 11-6-2013 at 13:26
they sure do look like keck clips but all them put together spell out " allah is great" where did you get those because they are expensive. i have
been thinking about buying a pair because i ruin at least one every time i distill nitric acid.
[Edited on 6-11-2013 by cyanureeves]Endimion17 - 11-6-2013 at 15:08
Don't use keck clips when you distill volatile mineral acids, it's simple as that. Keck clips are used to ensure that some parts of the apparatus
don't fall off and not for stopping fumes escaping the joints.
You use Keck clips between the cooler and the receiver and the receiving flask and the receiver, that's basically it. The clamps and the stands should
take care the rest is tight.
(BTW I love the spelling reference, good one, you earn One Internet )GammaFunction - 11-6-2013 at 15:59
Yes, they look like Keck clips, but there are similar clips available for ball joints. So I'm wondering if anyone recognizes this particular shape.
I'm not sure if they're called Keck clips, but they're certainly used for the same purpose. I purchased one like that because I needed a metal #24
clip, and this style was the only one sold individually. IMO they're inferior to "modern" keck clips, they're a pain in the ass to use and can scratch
up your glassware.Dr.Bob - 12-6-2013 at 05:23
Yes, these do the same function as Keck clips, their advantage is that they are more resistant to certain solvents and also to higher temps. If you
are heating your glassware to higher temps, the Kecks will melt, I have done that, so be careful, I try never to depend on them holding the apparatus
together, especially under weight (eg, don't hang a flask on the vacuum adapter, then fill it with 500 ml of DCM and expect it to hold the weight.)
But for most uses, the plastic ones are fine and less scratching. ElizabethGreene - 13-6-2013 at 08:17
I've never been able to get them on the joint. The wire is very stiff. Perhaps they weren't made to the right specification, or my joints are odd.
They are tight as shit. You really have to use a lot of force.Sublimatus - 13-6-2013 at 10:49
I figure they'd probably fit if I really tried hard, but as a general rule I tend to look for alternatives when the solution comes down to being
forceful. Especially in the lab -- as in the case of frozen joints -- the thought of breaking expensive ground glass apparatus keeps me from acting
bullish and impatient.jock88 - 14-6-2013 at 12:06
You could try heating one of them to a (say) dull red and this will remove some of the springyness?Pyro - 15-6-2013 at 08:09
it will make them a lot more prone to bending though!
)