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Title: Method and apparatus for producing oxygen and nitrogen and membrane therefor

Abstract

Process and apparatus for the separation and purification of oxygen and nitrogen as well as a novel membrane useful therein are disclosed. The process utilizes novel facilitated transport membranes to selectively transport oxygen from one gaseous stream to another, leaving nitrogen as a byproduct. In the method, an oxygen carrier capable of reversibly binding molecular oxygen is dissolved in a polar organic membrane which separates a gaseous feed stream such as atmospheric air and a gaseous product stream. The feed stream is maintained at a sufficiently high oxygen pressure to keep the oxygen carrier in its oxygenated form at the interface of the feed stream with the membrane, while the product stream is maintained at a sufficiently low oxygen pressure to keep the carrier in its deoxygenated form at the interface of the product stream with the membrane. In an alternate mode of operation, the feed stream is maintained at a sufficiently low temperature and high oxygen pressure to keep the oxygen carrier in its oxygenated form at the interface of the feed stream with the membrane and the product stream is maintained at a sufficiently high temperature to keep the carrier in its deoxygenated form at the interface ofmore » the product stream with the membrane. Under such conditions, the carrier acts as a shuttle, picking up oxygen at the feed side of the membrane, diffusing across the membrane as the oxygenated complex, releasing oxygen to the product stream, and then diffusing back to the feed side to repeat the process. Exceptionally and unexpectedly high O.sub.2 /N.sub.2 selectivity, on the order of 10 to 30, is obtained, as well as exceptionally high oxygen permeability, on the order of 6 to 15.times.10.sup.-8 cm.sup.3 -cm/cm.sup.2 -sec-cmHg, as well as a long membrane life of in excess of 3 months, making the process commercially feasible.« less

Inventors:
 [1];  [1]
  1. (Bend, OR)
Issue Date:
Research Org.:
Bend Research Inc
OSTI Identifier:
865595
Patent Number(s):
4542010
Assignee:
Bend Research, Inc. (Bend, OR) RLO
DOE Contract Number:  
AC06-79ER10337
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; producing; oxygen; nitrogen; membrane; process; separation; purification; novel; useful; therein; disclosed; utilizes; facilitated; transport; membranes; selectively; gaseous; stream; leaving; byproduct; carrier; capable; reversibly; binding; molecular; dissolved; polar; organic; separates; feed; atmospheric; air; product; maintained; sufficiently; pressure; oxygenated; form; interface; deoxygenated; alternate; mode; operation; temperature; conditions; shuttle; picking; diffusing; complex; releasing; repeat; exceptionally; unexpectedly; selectivity; 10; 30; obtained; permeability; 15; times; -8; cm; -cm; -sec-cmhg; life; excess; months; commercially; feasible; oxygenated form; atmospheric air; polar organic; deoxygenated form; process utilizes; gaseous stream; product stream; feed stream; gaseous product; gaseous feed; oxygen pressure; oxygen carrier; molecular oxygen; releasing oxygen; transport membrane; carrier capable; binding molecular; leaving nitrogen; process commercially; alternate mode; reversibly binding; membrane useful; facilitated transport; commercially feasible; producing oxygen; novel membrane; useful therein; organic membrane; /423/95/96/422/436/

Citation Formats

Roman, Ian C., and Baker, Richard W. Method and apparatus for producing oxygen and nitrogen and membrane therefor. United States: N. p., 1985. Web.
Roman, Ian C., & Baker, Richard W. Method and apparatus for producing oxygen and nitrogen and membrane therefor. United States.
Roman, Ian C., and Baker, Richard W. Tue . "Method and apparatus for producing oxygen and nitrogen and membrane therefor". United States. https://www.osti.gov/servlets/purl/865595.
@article{osti_865595,
title = {Method and apparatus for producing oxygen and nitrogen and membrane therefor},
author = {Roman, Ian C. and Baker, Richard W.},
abstractNote = {Process and apparatus for the separation and purification of oxygen and nitrogen as well as a novel membrane useful therein are disclosed. The process utilizes novel facilitated transport membranes to selectively transport oxygen from one gaseous stream to another, leaving nitrogen as a byproduct. In the method, an oxygen carrier capable of reversibly binding molecular oxygen is dissolved in a polar organic membrane which separates a gaseous feed stream such as atmospheric air and a gaseous product stream. The feed stream is maintained at a sufficiently high oxygen pressure to keep the oxygen carrier in its oxygenated form at the interface of the feed stream with the membrane, while the product stream is maintained at a sufficiently low oxygen pressure to keep the carrier in its deoxygenated form at the interface of the product stream with the membrane. In an alternate mode of operation, the feed stream is maintained at a sufficiently low temperature and high oxygen pressure to keep the oxygen carrier in its oxygenated form at the interface of the feed stream with the membrane and the product stream is maintained at a sufficiently high temperature to keep the carrier in its deoxygenated form at the interface of the product stream with the membrane. Under such conditions, the carrier acts as a shuttle, picking up oxygen at the feed side of the membrane, diffusing across the membrane as the oxygenated complex, releasing oxygen to the product stream, and then diffusing back to the feed side to repeat the process. Exceptionally and unexpectedly high O.sub.2 /N.sub.2 selectivity, on the order of 10 to 30, is obtained, as well as exceptionally high oxygen permeability, on the order of 6 to 15.times.10.sup.-8 cm.sup.3 -cm/cm.sup.2 -sec-cmHg, as well as a long membrane life of in excess of 3 months, making the process commercially feasible.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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