Patent ID: 6536233
Filing Date: 2003-03-25
Classification: B01D,F25J,Y10S

Abstract:
A process for the production of ultra-pure oxygen comprising the steps of:introducing a mixture containing oxygen into a distillation column and producing a bottom product rich in oxygen; withdrawing an intermediate flow, substantially free from impurities heavier than oxygen, at a level of the column located above the point of introduction of said mixture, the point of withdrawal being separated from the point of introduction by a distillation section; sending the flow withdrawn to an oxygen purification column which produces at its bottom ultra-pure oxygen; and distributing a reflux liquid over said section by means of a distributor comprising perforations for the passage of liquid and openings for the passage of gas, wherein there is a predetermined non-uniformity of the distribution of the reflux liquid over the upper surface of said section in at least one localized region of the surface.