PROCESS FOR SEPARATING A MIXED GAS INTO OXYGEN AND NITROGEN UNDER LOW TEMPERATURE AND LOW PRESSURE CONDITIONS

摘要

A process for separating a mixing gas into oxygen and nitrogen under low temperature and low pressure conditions which comprises introducing a mixed gas comprising chiefly oxygen and nitrogen into at least two adsorption towers, each packed with sodium faujasite typical of which is Na-X, at a temperature not higher than room temperature under conditions of an atmospheric pressure to 3 ata thereby causing the nitrogen in the mixed gas to be selectively adsorbed, collecting highly pure oxygen or an oxygen-enriched gas from the outlet of the adsorption towers, and reducing the pressure of the at least two adsorption towers, in which the nitrogen gas been adsorbed, to a level of from 0.08 to 0.5 ata, to cause the nitrogen gas to be desorbed and the sodiumfaujasite to be regenerated.