Process for the recovery of nitrogen-rich gases from gases...

Details Process for the recovery of nitrogen-rich gases from gases... Process for the recovery of nitrogen-rich gases from gases...

B - Operations, Transporting

01

D

183/24

B01D 53/02 (2006.01) B01D 53/047 (2006.01) C01B 21/02 (2006.01)

Patent

CA 1098050

ABSTRACT OF THE DISCLOSURE The present process is an improvement of an earlier process wherein a nitrogen enriched gas is obtained from a gas containing oxygen and possibly other components. In that process the feed gas is passed in a continuous flow cycle through an ad- sorber containing carbonaceous molecular sieve coke followed by evacuation of the adsorber, oxygen and possibly other gas components being adsorbed and the discharged nitrogen-enriched gas being col- lected until the continually rising oxygen contents thereof reaches a predetermined limit value whereupon the molecular sieve coke is desorbed of the residual gases prior to the next charging cycle. The present improvement is constituted by the feature that the flow of feed gas through the molecular sieve coke is effected at a con- tinually increasing pressure until a terminal pressure of about 3 to 10 bar has been reached. -1-

290967

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