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US 5,225,174 AGranted
Nitrogen sorption
AssigneeBend Research, Inc.
InventorsDwayne T. Friesen, Walter C. Babcock, David J. Edlund, Warren K. Miller
Life of this patent
Estimating the term…
Abstract
Nitrogen-sorbing and -desorbing compositions and methods of using the same are disclosed, which are useful for the selective separation of nitrogen from other gases, especially natural gas.
Claims21
A process for the separation of nitrogen comprising the steps:
- (a) absorbing nitrogen from a nitrogen-containing feed stream containing from 0.1 to 80 vol % nitrogen by contacting said feed stream with a composition comprising a solvent and an organometallic complex, said organometallic complex consisting essentially of a transition metal selected from Mo, W and a metal from Groups 7, 8 and 9, and one or more ligands capable of providing five or six coordinating atoms to said organometallic complex, said solvent being capable of dissolving said organometallic complex to .gtoreq.0.1M;
- and
- (b) desorbing nitrogen from said composition to a product stream wherein the conditions for conducting steps (a) and (b) are selected from one of
- (i) step (a) is conducted at a lower temperature than step (b);
- (ii) step (a) is conducted at a nitrogen partial pressure that is greater than the nitrogen partial pressure of step (b);
- and
- (iii) both (i) and (ii).
4 more elements
A process for the separation of nitrogen comprising the steps:
- (a) absorbing nitrogen from a nitrogen-containing feed stream containing from 0.1 to 80 vol % nitrogen by contacting said feed stream with a solid composition comprising a solid inert matrix and an organometallic complex, the concentration of said organometallic complex being .gtoreq.0.1M relative to said matrix, said organometallic complex consisting essentially of a transition metal selected from Mo, W and a metal from Groups 7, 8 and 9, and one or more ligands capable of providing five or six coordinating atoms to said organometallic complex;
- and
- (b) desorbing nitrogen from said composition to a product stream, wherein the conditions for conducting steps (a) and (b) are selected from one of
- (i) step (a) is conducted at a lower temperature than step (b);
- (ii) step (a) is conducted at a nitrogen partial pressure that is greater than the nitrogen partial pressure of step (b);
- and
- (iii) both (i) and (ii).
4 more elements
Dependencies are inferred from the claim text.