F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
162/104
F25J 3/04 (2006.01)
Patent
CA 1048396
"METHOD AND APPARATUS WITH A SINGLE RECTIFYING COLUMN FOR AIR FRACTIONATION" Abstract of the Disclosure A method for the fractionation of air is described allowing the separation Or oxygen, nitrogen and argon by a single fractionation column from the top of which gaseous nitrogen is drawn and to which liquid nitrogen is recycled, whereas from the bottom of the column li- quid oxygen is drawn which is then heated and recycled into the same, a gaseous product enriched in argon being drawn from an intermediate zone of the fractionation column, The apparatus for carrying out the method com- prises substantially one single rectification column which is connected on its top to a drawing and cooling circuit for gaseous nitrogen and recycling circuit for liquid nitrogen; on its middle zone to the supplying line for compressed, cooled and expanded air to be frac- tionated; and on its bottom to a drawing and heating circuit for liquid oxygen to be partially recycled to the same bottom zone. - 1 -
248810
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