Recycling of used perfluorosulfonic acid membranes

Liquid purification or separation – Processes – Separating

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C210S774000, C423S022000, C423S017000, C423S020000, C423S049000, C588S407000

Reexamination Certificate

active

11089547

ABSTRACT:
A method for recovering and recycling catalyst coated fuel cell membranes includes dissolving the used membranes in water and solvent, heating the dissolved membranes under pressure and separating the components. Active membranes are produced from the recycled materials.

REFERENCES:
patent: 2710799 (1955-06-01), Leopard
patent: 3060162 (1962-10-01), van den Berg et al.
patent: 3309518 (1967-03-01), Weiss
patent: 3853755 (1974-12-01), Ganci
patent: 4266036 (1981-05-01), Baczek et al.
patent: 4433082 (1984-02-01), Grot
patent: 4434116 (1984-02-01), Covitch
patent: 4453991 (1984-06-01), Grot
patent: 4526904 (1985-07-01), Kishida et al.
patent: 4687755 (1987-08-01), Green
patent: 4762952 (1988-08-01), Green
patent: 4775452 (1988-10-01), Kuninaga et al.
patent: 5133843 (1992-07-01), Eisman
patent: 5393388 (1995-02-01), Herrmann et al.
patent: 5393389 (1995-02-01), Herrmann et al.
patent: 5423957 (1995-06-01), Herrmann et al.
patent: 5431823 (1995-07-01), Gofer
patent: 5436086 (1995-07-01), Seymour et al.
patent: 5498321 (1996-03-01), Arnold et al.
patent: 5718984 (1998-02-01), Iwase et al.
patent: 5755951 (1998-05-01), Kroner et al.
patent: 5779763 (1998-07-01), Pinnau et al.
patent: 5840643 (1998-11-01), Park et al.
patent: 5876785 (1999-03-01), Kroner et al.
patent: 5899393 (1999-05-01), Kroner et al.
patent: 5955394 (1999-09-01), Kelly
patent: 6214190 (2001-04-01), Fache et al.
patent: 6793799 (2004-09-01), Ozawa et al.
patent: 2003/0099322 (2003-05-01), Ozawa et al.
patent: 2004/0121210 (2004-06-01), Hamrock et al.
patent: 2005/0211630 (2005-09-01), Grot et al.
patent: 2006/0144791 (2006-07-01), Debe et al.
patent: 2006/0147791 (2006-07-01), Debe et al.
patent: 2006/0183006 (2006-08-01), Liu et al.
patent: 2003026650 (2003-01-01), None
patent: WO 192383 (2001-12-01), None
Nafion(Reg. TM) from http://en.wikipedia.org/wiki/Nafion; 5 pages.
Nafion(Reg. TM) Physical and Chemical Properties; from: http://www.permapure.com/TechNotes/Nafion%20physical%20&%20chemical.htm; 3 pages.
“Safe Handling and Use of Perfluorosulfonic Acid;” from http://www.dupont.com/fuelcells/pdf/dfc301.pdf; 3 pages.
Benson, M., et al. (2000). “The Recovery Mechanism of Platinum Group Metals from Catalytic Converters in Spent Automotive Exhaut Systems.”Resources, Conservation and Recycling, 31, 1.
Bhakta, P. N. H. (1994). “Recent Technology and Trends in Automotive Recycling.”J. Met., Feb., 36.
Gebel, G. (2000). “Structural Evolution of Water Swollen Perfluorosulfonated Ionomers from Dry Membrane to Solution.”Polymer, 41, 5829-5838.
Handley, C., et al. (2002). “Impact of the European Union Vechicle Waste Directive on End-of-Life Options for Polymer Electrolyte Fuel Cells.”J. Power Sources, 106, 344.
Hoffmann, J. E. (1988). “Recovering Platinum-Group Metals from Auto Catalysts.”Journal of Metals(June), 40.
Wernick, I. K, and Themelis, N. J. (1998). “Recycling Metals for the Environment.”Ann. Rev. Energy Environ., 23, 465.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Recycling of used perfluorosulfonic acid membranes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recycling of used perfluorosulfonic acid membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recycling of used perfluorosulfonic acid membranes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3848612

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.