greenyppols - 2-5-2005 at 05:10
Which would you prefer? Ceramic or Borosilicate glass Raschig rings? For overall use?
I've seen the glass ones on ebay and I was curious of opinions here.
Rings
MadHatter - 2-5-2005 at 14:51
If you're using these in a reflux column, I would go with the glass rings. However, if reflux
is your goal, I found that glass beads from the local arts and craft shops work well and are cheaper.
greenyppols - 3-5-2005 at 03:25
Thanks.
I have 6mm ceramic rings which I found that work fine as boiling stones. I figured more porous the better. When I noticed the glass ones on Ebay,
which look like anyone could make 'em with enough patience, I was just wondering what anyone else thought, 'cause they seemed to cost mucho
$$$ to me.
The rings are currently sometime used in a fractionating column..essential oil distiller...I just snag a few when I need 'em.
Esplosivo - 3-5-2005 at 04:56
For my fractionating column I use the glass pieces of roughly 4x4mm from a broken glass bottle (place in a bag or two, and break it, no extra details
needed 
). It is fairly efficient and surely much cheaper.
If you have the patience (and some skill) you could make some glass rachig rings from glass rods IIRC. Check out the book recently posted on the threa
'books' regarding glass manipulation for laboratory purposes. Hope this helps.
unionised - 4-5-2005 at 01:23
I'm sure they both work fine. Glass has the advantages that its totally non-porous so you can clean it easily and it's clear so you can see
if it's clean.
Mahlzahn - 4-5-2005 at 06:34
Don`t exist modern resist rings for a
reflux column ?
polyuretane rings 
?
[Edited on 4-5-2005 by Mahlzahn]