I was wondering if anyone here had any experience with the vacuum sublimation purification of gram quantities of organic materials. More specifically
what kind of apparatus works well, other than a dedicated sublimator. I had wanted to use a coldfinger condenser inside a side-arm filter tube, but i
cant find one that has a socket connection. Any help would be very much appreciated.Magpie - 20-4-2006 at 10:11
I have used a 20mm test tube with side arm equipped with a 13mm test tube as cold finger. The smaller tube is sealed to the larger one with a rubber
adapter. I bought the adapter from a scientific supply house. But IIRC it was hard to find and a bit expensive.The_Davster - 20-4-2006 at 12:29
I sublimated napthalene or camphor, I forget which, in a uni organic lab. I believe I used a 100mL RBF with ice water suspended over a 250mL beaker
in which the compound was placed. Glass wool was stuffed inbetween the flask and beaker for a better seal.leu - 20-4-2006 at 17:18
Quote:
I bought the adapter from a scientific supply house. But IIRC it was hard to find and a bit expensive.
One can freeze a rubber stopper and then drill it out using conventional drills and a drill press instead of paying such prices
