the approximate composition of the air today
is 78.08%
nitrogen
20.95 oxygen
0.93%
argon
0.04% caron dioxied
and between 0-4% water vapour
nitrogen , argon ,and oxygen
can be separated from the air by liquefaction
followed by fractional distillaiton
firstly the air is filtered
to remove dust
it is then
cooled to minus 200-degree Celsius at which temperature air is a liquid
as it is cooled
water vapour condenses, and it is removed b absorbent filters carbon dioxide is then removed at -79 degrees Celcius
when it freezes , the oxygen liquifies at -183 degrees celsius
argon at -186 C and nitrogen at minus 196.C
the liquid nitrogen argon and oxygen
are then seperated by fractional distillation lets have a look at this process in detail
first as we said before the air is cooled to -200 degrees