Adsorptive separation process
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United States of America Patent
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May 14, 1991
Grant Date -
N/A
app pub date -
May 16, 1989
filing date -
Sep 16, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An adsorptive separation process of the present invention relates to a process for separating hydrogen and/or helium by a pressure swing adsorption process using four or more adsorbent beds. Each adsorbent bed manipulates the individual steps of adsorption, equal depressurization, cocurrent depressurization, countercurrent depressurization, purging, equal pressurization, product pressurization and raw gas pressurization while sequentially switching them and carries out the raw gas pressurization step for applying pressure with raw gas as the final step for pressuring the adsorbent bed to the adsorbent pressure. Accordingly, a variation in pressure and flow rate can be suppressed, product can be attained stably, and the amount of product can be increased.
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