a process for separating a feed gas mixture into a more strongly adsorbable component and a less strongly adsorbable component in a plurality of adsorbent beds containing an adsorbent selective for the more strongly adsorbable component with two cocurrent depressurizations , first to provide product and then to provide a purge gas , and using a combination of less strongly adsorbable component and feed gas mixture to repressurize the adsorbent bed . oxygen product can be recovered from air at high recovery using the process .