Recovery of carbon dioxide from gas mixtures

Details Recovery of carbon dioxide from gas mixtures Recovery of carbon dioxide from gas mixtures

F - Mech Eng,Light,Heat,Weapons

25

J

162/100, 162/109

F25J 3/00 (2006.01) B01D 53/22 (2006.01) C01B 31/20 (2006.01) F25J 3/02 (2006.01)

Patent

CA 1236766

RECOVERY OF CARBON DIOXIDE FROM GAS MIXTURES ABSTRACT Carbon dioxide is recovered from gas mixtures containing it in a concentration not greater than the equilibrium concentration at the freezing temperature of the mixture, by concentrating the carbon dioxide in the mixture to a level between said equilibrium concentration and 98% by volume of the mixture by membrane separation and thereafter distilling the concentrate at subambient temperature and recovering carbon dioxide as a liquid bottoms product of the distillation, the overhead from the distillation preferably being returned to the membrane separation step.

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