Patent ID: 9492781
Filing Date: 2016-11-15
CPC Classification: A23L,A23V,A61K,A61L,A61M,B01D,C02F,F17D,Y10T

Claim Text:
1. A method, comprising: compressing in a device an ambient air flow comprising oxygen and nitrogen to form a compressed air flow; transporting said compressed flow through an adsorbent bed and adsorbing at least a portion of said nitrogen to form an oxygen-enriched gas flow; wherein the pressure drop across said adsorbent bed during said transporting is less than about 50 kPa; removing said oxygen-enriched gas flow to form an oxygen-enriched product; transporting said oxygen-enriched product to a first vessel and a second vessel; retaining a defined volume of oxygen-enriched product in said second vessel; desorbing from said adsorbent bed said portion of said nitrogen; purging said adsorbent bed with at least a portion of said oxygen-enriched product from said first vessel and without oxygen-enriched product from said second vessel; repeating said previous steps until a predetermined pressure is achieved in said second vessel; and purging any remaining volume of said oxygen-enriched product from said first vessel through said adsorbent bed and an air storage vessel upon shutdown.