Two stage pressure swing adsorption process which utilizes an ox

Details Two stage pressure swing adsorption process which utilizes an ox Two stage pressure swing adsorption process which utilizes an ox

1994-01-12

1995-03-07

Spitzer, Robert

Gas separation: processes

Solid sorption

Including reduction of pressure

95117, 95122, 95130, 95138, 95139, B01D 5304

Patent

active

053954270

ABSTRACT:
A two stage pressure swing adsorption process is set forth for producing high purity oxygen from a feed air stream wherein carbon dioxide, water and preferably nitrogen are removed in the first stage and wherein an oxygen selective adsorbent is used to adsorb oxygen in the second stage. The oxygen product is recovered upon depressurization of the second stage. The high purity of the oxygen product is achieved by rinsing the oxygen selective adsorbent with oxygen prior to the depressurization step. A key to the present invention is that the effluent streams from the second stage feed and rinse steps are used to regenerate the first stage adsorbent(s) in a specific regeneration scheme.

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