B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/25
B01D 53/04 (2006.01) B01D 53/047 (2006.01) C01B 3/56 (2006.01)
Patent
CA 1098051
ABSTRACT OF THE DISCLOSURE An improved selective adsorption process is provided for the separation of gaseous mixtures. The process includes a number of steps. The first step includes passing a feed gas mixture containing components A and B successively at a first pressure through two adsorption beds selective for com- ponent A until the evolving adsorption front of component A substantially reaches the outflow end of the first adsorption bed or has only insubstantially penetrated into the second adsorption bed; discharging an A-free product gas from the outflow end of the second adsorption bed; then interrupting the feeding of the feed gas mixture to the first adsorption bed. The second step includes expanding both adsorption beds in the adsorption direction to a lower pressure sufficient so that proportions of unadsorbed component A emerge from the first adsorption bed, and so that such emerged proportions from the first adsorption bed are adsorbed in the second ad- sorption bed; and withdrawing an A-free gas from the second adsorption bed. The next step involves at the same pressure as in the second step, conducting a further gaseous mixture in the adsorption direction through both adsorption beds, the partial pressure of component A in the further gaseous mixture being higher than in the feed gas; interrupting the feeding of the of the further gaseous mixture before the breakthrough of component A through the second adsorption bed; and withdrawing an A-free gas from the second adsorption bed. The next step involves disconnecting both adsorption beds from one another, and expanding the first adsorption bed loaded substantially completely with component A to recover component A; and substantially simultaneously expanding the Abstract ... (cont'd) second adsorption bed, partially loaded with component A, in a countercurrent direction to the adsorption process and passing a purge gas in that countercurrent direction through the expanded second adsorption bed to desorb compon- ent A. The final step includes reconnecting both adsorption beds with each other and charging the same to the first pres- sure of the first step. This improved process provides for the separation of gaseous mixtures into at least two com- ponents in a purity and in a yield not attained by means of the prior art processes.
271057
Linde Aktiengesellschaft
Marcus & Associates
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