Modified poly(phenylene oxide) based membranes for enhanced fluid separation

Patent 5348569 Issued on September 20, 1994. Estimated Expiration Date:

June 30, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Praxair Technology, Inc.

Application

No. 083594 filed on 06/30/1993

US Classes:

95/45, Selective diffusion of gases through substantially solid barrier (e.g., semipermeable membrane, etc.)95/51, Carbon dioxide or carbon monoxide permeates barrier95/53, Helium permeates barrier95/54, Oxygen permeates barrier95/55, Hydrogen permeates barrier96/13Ring containing organic compound

Examiners

Primary: Spitzer, Robert

Attorney, Agent or Firm

Pak; Chung K.

Foreign Patent References

1197196 CA 11/13/1985
263672 CS 08/13/1989
0099187 EP 01/13/1984
0181850 EP 05/13/1986
0277834 EP 08/13/1988
0298531 EP 01/13/1989
0394505 EP 10/13/1990
0404416 EP 12/13/1990
100917 JP 05/13/1988
137703 JP 06/13/1988
264102 JP 11/13/1988
305904 JP 12/13/1988

International Classes

B01D 053/22
B01D 069/12

Abstract

The present invention relates to composite membranes and membranes which are formed from modified poly(phenylene oxide) polymers having improved film forming properties and separation characteristics. The present invention further relates to poly(phenylene oxide) polymer and modified poly(phenylene oxide) polymer, having improved membrane forming characteristics and processes for producing the same.

Other References

Journal of Membrane Science, vol. 64, "Formation of Asymmetric Hollow Fiber Membranes for Gas Separation," by Smid et al, pp. 121-127, 1991
Chemical Abstract No. 236575Y, vol. 112, No. 14 "Hollow Poly (Phenylene Oxide) Fibers and Process for Manufacturing Them," by Pechocova et al, p. 7, 1990
Ind. Eng. Chem. Res., vol. 28, No. 6, 1989 "Analysis and Construction of Multilayer Composite Membranes to the Separation of Gas Mixture," by Kevin A. Lundy et al. (Reprinted from ISEC Research 1989. 28. 742)
Journal of Applied Polymer Science, vol. 20 (1976) "Sulfonated Polysulfone" by A. Noshay et al, pp. 1885-1903
George Odian, "Principles of Polymerization," 2nd Edition, A. Wiley-Interscience Publication, John Wiley & Sons, pp. 22-23
Journal of Applied Polymer Science, vol. 29, p. 4029, 1984
"Research and Development of NS-1 and Related Polysulfone Hollow Fibers for Reverse Osmosis Desalination of Sea Water," PB 248, 666; the Office Water Research and Technology Contract No. 14-30-3165, U.S. Dept. of the Interior, 1975
"Research on Advanced Membranes for Reverse Osmosis," an annual report to the Office of Saline Water, U.S. Dept. of the Interior, Contract No. 14-30-2999, 1973
Research and Development Progress Report No. 697, Contract No. 14-30-2627 to the U.S. Dept. of Interior, "Development of Polyphenylene Oxide Membranes," by Chludzinski et al, Jun. 1971
Psaiination vol. 36, (1981), "Asymetric Reverse Osmosis and Ultrafiltration Membranes Prepared from Sulfonated Poly Sulfone," by Friedrich et al, pp. 39-62
Journal of Applied Polymer Science, vol. 23, pp. 1509-1503, 1979
"Research on In Situ-Formed Condensation Polymer for Reverse Osmosis Membranes," Final Report to the Office of Water Research and Technology, U.S. Dept. of the Interior, Contract No. 14-34-001-6521, 1978
"Development of a Composite Reverse Osmosis Membrane for Single Pass Sea Water Desalination," Final Report to the office of Water Research Technology, U.S. Dept. of the Interior, Contract No. 14-34-0001.7541, 197