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US 4,451,270 AGranted
Absorption process for producing oxygen and nitrogen and solution therefor
AssigneeBend Research, Inc.
InventorIan C. Roman
Life of this patent
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AssigneeBend Research, Inc.
InventorIan C. Roman
Estimating the term…
Process for the separation and purification of oxygen and nitrogen is disclosed which utilizes solutions of oxygen carriers to selectively absorb oxygen from a gaseous stream, leaving nitrogen as a byproduct. In the process, an oxygen carrier capable of reversibly binding molecular oxygen is dissolved in a solvent solution, which absorbs oxygen from an oxygen-containing gaseous feed stream such as atmospheric air and desorbs oxygen to a gaseous product stream. The feed stream is maintained at a sufficiently high oxygen pressure to keep the oxygen carrier in its oxygenated form during absorption, while the product stream is maintained at a sufficiently low oxygen pressure to keep the carrier in its deoxygenated form during desorption. In an alternate mode of operation, the carrier solution is maintained at a sufficiently low temperature and high oxygen pressure to keep the oxygen carrier in its oxygenated form during absorption, and at a sufficiently high temperature to keep the carrier in its deoxygenated form during desorption. Under such conditions, exceptionally high oxygen concentrations on the order of 95% to 99% are obtained, as well as a long carrier lifetime in excess of 3 months, making the process commercially feasible.
A process for the separation and purification of oxygen and nitrogen comprising:
A process for the separation and purification of oxygen comprising:
A process for the separation and purification of oxygen and nitrogen comprising:
A process for the separation and purification of oxygen comprising:
A solution useful for the separation of oxygen and nitrogen from atmospheric air comprising a solvent or solvent mixture, an axial base and an oxygen carrier, said solvent or solvent mixture being capable of dissolving the axial base and the oxygen carrier when they are present together, said axial base being capable of providing a coordinating atom to the oxygen carrier, and said oxygen carrier being a mutual-containing complex having any of the structures ##STR27## wherein M is a metal selected from cobalt, iron, copper, nickel, manganese, ruthenium or rhodium;
A solution useful for the separation of oxygen and nitrogen from atmospheric air comprising a solvent or solvent mixture and a pentacoordinate oxygen carrier, said solvent or solvent mixture being capable of dissolving said pentacoordinate oxygen carrier, and said pentacoordinate oxygen carrier being a metal-containing complex having any of the structures ##STR30## wherein M is a metal selected from cobalt, iron, copper, nickel, manganese, ruthenium or rhodium;
Dependencies are inferred from the claim text.