Need some help/tips/links.. anything

[MonsterBengt]

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[MBTN]

You're kidding right? Not that I know how to do this either, but do you have any idea how COLD -230 celcius is? Another 43 degrees lower is absolute 0. I don't know how you intend to get anywhere near that.

[jabby_jabby]

Yes, going that cold seems silly.

I would imagine that since air is a conglomerate of different gasses, you would just have to figure out what the freezing point is of oxygen, and then every other gas present in the air (y'know, hydrogen, helium, etc etc) then figure out where oxygen stands. Then cool the air until almost the point that oxygen freezes (or liquifies, whatever), remove everything that is already solid or liquified, lower the temperature to the freezing/liquifying point of oxygen, then remove the solid/liquid oxygen.

Easy peasy.

Actually, I am talking out of my ass. Is this for a science project or assignment? Or your own morbid curiosity? Or do you need pure oxygen for something? If it's the latterest, go to a medical supply store and see if you can get some oxygen in tanks. That's probably simplest.

[clawhammer]

If I remember correctly from Chemistry, it's not possible to even go below absolute 0.

[jabby_jabby]

Originally Posted by clawhammer

If I remember correctly from Chemistry, it's not possible to even go below absolute 0.

You're right. Absolute zero is the theoretical point where all matter gets as slow as it possibly can, though matter theorietically cannot stop moving (http://www.pa.msu.edu/~sciencet/ask_st/012992.html). It's never been reached. It's just a theoretical number. 0 Kelvin, -273 celcius, -459 farenheit.

[KustmAce]

Someone didnt do there homework...Did they?

[MonsterBengt]

Uhm.. the reason im asking is kinda.. classified 'top-secret', whatever.. but to make the question more specefic, the air is going to be injected thru a 'filter', to come out as pure oxygen, while the rest isn't used. Its the filter I need tips about :P

[2.2 Straight six]

i doubt you can "filter" it, but you can probably make a chemical reaction where oxygen is given off, in fact im sure you can. because i have done one many times in chemistry, i have my chemistry folder downstairs, i'll see if it has the equation in it.

[sameintheend01]

easy...i actually used to do this at work. you can buy liquid oxygen (available for filling up oxygen tanks that old people use).
check this out: http://www.chadtherapeutics.com/home.htm

in the machine, there is this tube coated with beads that air runs through. the nitrogen in the air sticks to those beads and the oxygen comes out.

[MonsterBengt]

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