ncurses - 23-2-2007 at 21:34
I have a normal pyrex graham condenser, and I want to make liquid oxygen. Could I do this by running gaseous oxygen through the coil and using liquid
nitrogen as the coolant, or is liquid nitrogen cold enough that the temperature difference will break the glass?
12AX7 - 23-2-2007 at 21:55
Not if you cool it down slow enough. LN2 isn't much cooler than LO2 but it'll work.
Tim
not_important - 23-2-2007 at 23:55
But you'll boil off the LN2 sooo fast from the heat leakage from the outside world, I hope you have a really large container for storing the liquid
nitrogen.
If you can get LN2, usually you can get liquid air. Starting with that you can make a fractionating setup that sits in the mouth of a dewar / large
thermos of liquid air, selective evaoporation of nitrogen results in an every increasing concentration of oxygen in the remaining liquid.
But then if you can get LN2 and liquid air, you generally can get LOX.
[Edited on 24-2-2007 by not_important]
bereal511 - 24-2-2007 at 10:14
Question: what do you need the liquid oxygen for?
Levi - 24-2-2007 at 12:39
He's probably building a spaceship in his barn like The Astronaut Farmer. 