Patent ID: 6030435
Filing Date: 2000-02-29
Classification: B01D

Abstract:
PSA process for the separation of a gaseous flow containing essentially oxygen and nitrogen by preferential adsorption of the nitrogen, at a high adsorption pressure, on at least one bed of adsorbent material inserted in at least one separation zone, said material preferentially adsorbing nitrogen, each bed of adsorbent material being subjected to successive separation cycles, each separation cycle comprising at least:a feed phase comprising an introduction of the gaseous flow at a feed temperature (T.sub.feed) into the separation zone with passage from a low desorption pressure to the high adsorption pressure,a purge phase comprising a desorption of the nitrogen adsorbed on said adsorbent material at a desorption pressure which is below said high adsorption pressure, andregulating the feed temperature (T.sub.feed) of the gaseous flow to be separated and adjusting the high adsorption pressure.