04639257 is referenced by 83 patents and cites 13 patents.

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 subjecting the gas mixture to membrane separation and recovering from the membrane separation a permeate having a carbon dioxide concentration between the equilibrium concentration and 98% (by volume), distilling said permeate at subambient temperature above the freezing temperature of the permeate and recovering substantially pure carbon dioxide as a liquid bottoms product of the distillation. Carbon dioxide is recovered from gas mixtures containing it in a high concentration by supplying the gas mixture at superatmospheric pressure and distilling said gas mixture at sub-ambient temperature in a distillation column, recovering substantially pure carbon dioxide as a liquid bottoms product of the distillation, warming the overhead stream from the distillation to a temperature suitable for membrane separation, passing the overhead stream at superatmospheric pressure over a membrane which is selectively permeable for carbon dioxide and thereafter recycling carbon dioxide-rich permeate for recompression and feeding to the distillation column.

Title
Recovery of carbon dioxide from gas mixture
Application Number
675292
Publication Number
4639257
Application Date
July 15, 1985
Publication Date
January 27, 1987
Inventor
David I Limb
Stockport
GB
Melvyn Duckett
Stockport
GB
Agent
Browdy and Neimark
Assignee
Costain Petrocarbon
GB
IPC
B01D 53/22
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