Recovery process

Details Recovery process Recovery process

B - Operations, Transporting

01

D

183/24

B01D 53/04 (2006.01)

Patent

CA 1313629

ABSTRACT The present invention provides a process for separating a condensable gas from a non-condensable gas by serially switching at least three adsorber beds, which preferentially adsorb the condensable gas, through the following sequential steps: (a) an adsorption step in which a mixture of the condensable and non-condensable gases are passed through the bed and the separated non- condensable gas is withdrawn therefrom; (b) a supercharging step in which a stream relatively rich in the condensable gas is passed through the bed, said stream having an actual volume at least three times that necessary to displace a void volume of the bed; (c) a desorption step in which a vacuum is 34,828-F drawn on the bed and an amount of a non-conden- sable gas is bled through the bed; wherein the non-condensable gas in conjunction with the desorbed condensable gas from step (c) is passed into a vacuum pump and compressed, at least some of the condensable gas is condensed and at least part of the non-condensable gas and remaining condensable gas is then passed to step (b) as the stream relatively rich in the condensable gas; and such that continuous operation of the process with at least one of the beds in the adsorption step is permitted. 34,828-F

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